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  • 第三届 山东省ACM省赛

    Solved ID PID Title Accepted Submit
      A 2407 Impasse (+) 0 0
      B 2410 Mine Number 3 19
      C 2412 Fruit Ninja I 4 19
      D 2414 An interesting game 1 6
      E 2416 Fruit Ninja II 8 13
      F 2415 Chess 1 1
      G 2413 n a^o7 ! 10 14
      H 2411 Pixel density 9 36
      I 2409 The Best Seat in ACM Contest 10 20
      J 2408 Pick apples 7 45

    A Impasse (+)

    :http://www.sdutacm.org/sdutoj/showproblem.php?pid=2407&cid=1744


    B:Mine Number

    http://www.sdutacm.org/sdutoj/problem.php?action=showproblem&problemid=2410

    只要是第一行确定了,全部棋局也就确定了,dfs搜索第一行的情况,然后后面的直接根据上一行而定,这样最后就能得出整个矩阵了,第一行最多20个,也就是复杂度为2^20,不会超时,并且中间还会有剪枝。

    但是苦逼的是当时模拟的时候感觉dfs没什么用,只要第一行确定了其他就能确定的话,我直接二进制分解获得第一行就行了,但是这样做了好久,却不是TL就是WR,至今不知道为何,以后有时间了再看吧。。。(顺便也贴下第一次二进制分解的错误方法。。)

    #include <iostream>  
    #include <cstdio>  
    #include <string>  
    #include <cstring>  
    #define MAX 500  
    using namespace std;  
    char ch[100][100],res[100][100];  
    int T,n,m;  
    int dir[][2]= {{-1,0},{1,0},{0,-1},{0,1},{0,0}};  
    int mark=0;  
      
    bool OK(int x,int y){  
      int tempx,tempy;  
      for(int i=0;i<5;i++){  
        tempx=x+dir[i][0],tempy=y+dir[i][1];  
        if( (tempx<0 || tempx>=n || tempy<0 || tempy>=m) || ch[tempx][tempy]>='1')  
            continue;  
        else return false;  
      }  
      return true;  
    }  
      
    void update(int x,int y,int num){  
      for(int i=0;i<4;i++){  
         int tempx=dir[i][0]+x , tempy=dir[i][1]+y;  
              if( tempx >= 0 && tempx < n && tempy>=0 &&tempy<m )  
                  ch[tempx][tempy]+=num;  
        }  
      ch[x][y]+=num;  
    }  
      
      
    void printres(){  
      for(int i=0; i<n; i++)  
        {  
            for(int j=0; j<m; j++)  
                printf("%c",res[i][j]);  
            printf("
    ");  
        }  
    }  
      
      
    bool judge(){  
      for(int i=0;i<m;i++)  
        if(ch[n-1][i]!='0')  
          return false;  
      return true;  
    }  
      
    void dfs(int x,int y){  
      if(y>=m) x++,y=0;  
      if( x==n && y==0 ){  
        if(judge()){  
            printres();  
            mark=1;  
        }  
      }  
      if( x<0 || x>=n || mark==1) return ;  
      if(x==0){  
          if( OK(x,y) ){  
                update(x,y,-1);  
                res[x][y]='*';  
                dfs(x,y+1);  
                update(x,y,1);  
                res[x][y]='?';  
          }  
          res[x][y]='.';  
          dfs(x,y+1);  
        return ;  
      }  
      
      if( ch[x-1][y] !='0' && ch[x-1][y] !='1' )  
        return ;  
      if(ch[x-1][y]=='1'){  
        res[x][y]='*';  
        update(x,y,-1);  
        dfs(x,y+1);  
        update(x,y,1);  
        res[x][y]='?';  
      }  
    else{
      res[x][y]='.';  
      dfs(x,y+1); 
    } 
      return ;  
    }  
      
      
    int main ()  
    {  
        char dev[100];  
        int coun=1;  
        scanf("%d",&T);  
        while(T--)  
        {  
            mark=0;  
            scanf("%d%d",&n,&m);  
            for(int i=0; i<n; i++)  
                scanf("%s",&ch[i]);  
            printf("Case %d:
    ",coun++);  
            dfs(0,0);  
        }  
      
        return 0;  
    } 


    二进制分解
    #include <iostream>
    #include <cstdio>
    #include <string>
    #include <cstring>
    #define MAX 500
    using namespace std;
    char ch[100][100],temp[100][100],res[100][100];
    int T,n,m;
    int dir[][2]= {{-1,0},{1,0},{0,-1},{0,1}};
    
    bool Ok(int tempm){
      return temp[0][tempm]=='0' || (tempm!=0&&temp[0][tempm-1]=='0') || (tempm+1<m&&temp[0][tempm+1]=='0'); ///|| (1<n&&temp[1][tempm]=='0')
    }
    
    
    int main ()
    {
        char dev[100];
        int coun=1;
        scanf("%d",&T);
        while(T--)
        {
            scanf("%d%d",&n,&m);
            for(int i=0; i<n; i++)
                scanf("%s",&ch[i]);
            int x=(1<<m);
            printf("Case %d:
    ",coun++);
            int last=n-1;
            for(int ss=x-1; ss>=0; ss--)
            {
                int mark=1;
                int tempm=m-1;
                for(int j=0; j<m; j++)
                    res[0][j]='.';
                for(int i=0; i<=n-1; i++)
                    strcpy(temp[i],ch[i]);
    
                int tempss=ss;
                for(; tempss>0; tempm--)
                {
                    if(tempss%2)
                    {
                        res[0][tempm]='*';
                        if(Ok(tempm))
                        {
                            mark = 0;
                            last=2;
                            break;
                        }
                        temp[0][tempm]--;
                        if(tempm-1>=0) temp[0][tempm-1]--;
                        if(tempm+1<m) temp[0][tempm+1]--;
                        if(1<n) temp[1][tempm]--;
                    }
                    tempss/=2;
                }
    
                for(int i=1; i<n  &&  mark  ; i++)
                    for(int j=0; j<m  &&  mark; j++)
                    {
                        if( temp[i-1][j]!='0' && temp[i-1][j]!='1' )
                        {
                            mark=0;
                            last=min(n-1,i+2);
                            break;
                        }
                        res[i][j]='.';
                        if(temp[i-1][j]=='1')
                        {
                            res[i][j]='*';
                            for(int xxx=0; xxx<4; xxx++)
                                if(i+dir[xxx][0]>=0 && i+dir[xxx][0]<m && j+dir[xxx][1]>=0  && j+dir[xxx][1]<m)
                                {
                                    if(temp[  i+dir[xxx][0]  ][ j+dir[xxx][1] ]<='0')
                                    {
                                        mark=0;
                                        last=min(n-1,i+2);
                                        break;
                                    }
                                    temp[  i+dir[xxx][0]  ][ j+dir[xxx][1] ]--;
                                }
                            temp[i][j]--;
                        }
                    }
                if(mark==1)
                {
                    for(int i=0; i<m&&mark; i++) ///判断最后一行
                        if(temp[n-1][i]!='0')
                            mark=0,last=n-1;
    
                    for(int i=0; i<n&&mark; i++)
                    {
                        for(int j=0; j<m; j++)
                            printf("%c",res[i][j]);
                        printf("
    ");
                    }
                    if(mark){
                       break;
                    }
                }
            }
        }
    
        return 0;
    }
    




    CFruit Ninja I

     http://www.sdutacm.org/sdutoj/problem.php?action=showproblem&problemid=2412

    题意:一个切水果游戏。每秒出现一些水果,它们都在一条线上,有好水果和坏水果,好的可以加分,坏的减分,每次连续切好水果三个以上可以分数加倍。每秒只能切一次,每切一次要间隔m秒。问最多得多少分。

    暴力+dp 开始的时候没想到,没什么头绪,因为每一次需要间隔一定的时间,但是没考虑到每个时间点t内的最大值是可求得,这样直接DP就好了。。。

    #include<cstdio>
    #include<cstring>
    #include<cmath>
    #include<cstdlib>
    #include<iostream>
    #include<algorithm>
    #include<vector>
    #include<map>
    #include<queue>
    #include<stack>
    #include<string>
    #include<map>
    #include<set>
    #include<ctime>
    #define eps 1e-6
    #define MAX 10010
    #define INF 0x3f3f3f3f
    #define LL long long
    #define pii pair<string,int>
    #define rd(x) scanf("%d",&x)
    #define rd2(x,y) scanf("%d%d",&x,&y)
    using namespace std;
    struct Stru{
      int time;
      int x;
      int mm;
    }pos[MAX];
    int arr[MAX];
    int dp[MAX];
    
    bool cmp(Stru a,Stru b){
      if(a.time!=b.time) return a.time<b.time;
      return a.x<b.x;
    }
    
    int main()
    {
       int T;
       scanf("%d",&T);
       int n,m,temp,Case=1;
       while(T--){
          scanf("%d%d",&n,&m);
          for(int i=0;i<n;i++){
            scanf("%d%d%d",&pos[i].time,&temp,&pos[i].x);
            pos[i].mm = ( temp == 0 ? 1 : -1);
          }
          memset(arr,0,sizeof(arr));
          sort(pos,pos+n,cmp);
          
          
          int start=pos[0].time,sum=0,seque=0,mmax=0;///start:当前正在判断的时间标志
                                                     ///sum:在start秒里到当前位置能获得的最大的分数
                                                     ///     注意!如果seque统计需要加倍时在seque清0之前是没有Double分数的)
                                                     ///seque:连续的个数(用来最后统计Double分数的)
                                                     ///mmax:当前秒获得的最大分数
                                                     
          ///该部分统计分数的精髓:http://blog.csdn.net/u014665013/article/details/50094365
          for(int i=0;i<n;i++){ ///暴力求每个时间t能获得的最大分数(连续区间最大值)
            if(pos[i].time==start){
               if(pos[i].mm==-1){
                  if(seque>=3) sum+=seque;
                  seque=0;
               }
               else seque++;
               
               sum += pos[i].mm;
               if ( sum+(seque>=3?seque:0) > mmax)
                  mmax = sum+(seque>=3?seque:0);
               else if (sum < 0)
                  sum = 0;
            }
            else{
                arr[ pos[i-1].time ] = mmax;
                start=pos[i].time;
                sum=0,seque=0;
                if(pos[i].mm==1)
                   sum=1,seque=1;
                mmax=sum;
            }
          }
          arr[pos[n-1].time]=mmax;
    
          dp[0]=0;
          for(int i=1;i<=pos[n-1].time;i++){  ///dp最大值 转移方程 dp[i]=dp[i-1],dp[i-m-1]+arr[i]
            if(i>m+1)
                dp[i]=max(dp[i-1],dp[i-m-1]+arr[i]);
            else
                dp[i]=max(dp[i-1],arr[i]);
          }
          printf("Case %d: %d
    ",Case++,dp[pos[n-1].time]);
       }
       return 0;
    }
    


    D  An interesting game

    http://www.sdutacm.org/sdutoj/showproblem.php?pid=2414&cid=1744

    最小费用最大流,开始ps用贪心,每次找出最大高度或者最小高度的插入,然后如果最大高度的能插入则插最大的,否则就插小的,(注意插入时候需要贪心两步)感觉是可以的,但是最终问题出在哪里好像还不知道。

    一个不错的网址:http://www.hardbird.net/%E5%B1%B1%E4%B8%9C%E7%9C%81%E7%AC%AC%E4%B8%89%E5%B1%8A%E7%9C%81%E8%B5%9B-c-%E9%A2%98-an-interesting-game%E8%B4%B9%E7%94%A8%E6%B5%81/

    #include <iostream>
    #include <cstdio>
    #include <algorithm>
    #include <cstring>
    #include <vector>
    #include <queue>
    using namespace std;
    const int maxn=2200;
    const int oo=0x3f3f3f3f;
    struct Edge
    {
        int u, v, cap, flow, cost;Edge(){}
        Edge(int u, int v, int cap, int flow, int cost):u(u), v(v), cap(cap), flow(flow), cost(cost) {}
    };
    struct MCMF
    {
        int n, m, s, t;
        vector<Edge> edge;
        vector<int> G[maxn];
        int inq[maxn], d[maxn], p[maxn], a[maxn];
        void init(int n)
        {
            this->n=n;
            for(int i=0; i<n; i++)
                G[i].clear();
            edge.clear();
        }
        void AddEdge(int u, int v, int cap, int cost)
        {
            edge.push_back(Edge(u, v, cap, 0, cost));
            edge.push_back(Edge(v, u, 0, 0, -cost));
            m=edge.size();
            G[u].push_back(m-2);
            G[v].push_back(m-1);
        }
        bool spfa(int s, int t, int& flow, int& cost)
        {
            memset(d, 0x3f, sizeof d);
            memset(inq, 0, sizeof inq);
            d[s]=0, inq[s]=1, p[s]=0, a[s]=oo;
    
            queue<int> q;
            q.push(s);
            while(!q.empty())
            {
                int u=q.front();
                q.pop();
                inq[u]=0;
                for(int i=0; i<G[u].size(); i++)
                {
                    Edge& e=edge[G[u][i]];
                    if(e.cap>e.flow && d[e.v]>d[u]+e.cost)
                    {
                        d[e.v]=d[u]+e.cost;
                        p[e.v]=G[u][i];
                        a[e.v]=min(a[u], e.cap-e.flow);
                        if(!inq[e.v])
                        {
                            q.push(e.v);
                            inq[e.v]=1;
                        }
                    }
                }
            }
            if(d[t]==oo)return false;
            flow+=a[t];
            cost+=d[t]*a[t];
            int u=t;
            while(u!=s)
            {
                edge[p[u]].flow+=a[t];
                edge[p[u]^1].flow-=a[t];
                u=edge[p[u]].u;
            }
            return true;
        }
        int MinCost(int s, int t)
        {
            int flow=0, cost=0;
            while(spfa(s, t, flow, cost));
            return cost;
        }
    } net;
    
    int a[maxn], b[maxn];
    
    int main()
    {
        int T, kase=0;
        scanf("%d", &T);
        while(T--)
        {
            int n, m, k, ans=0;
            scanf("%d%d%d", &n, &m, &k);
            net.init(n+100);
            memset(b, 0, sizeof b);
            for(int i=0; i<n; i++)
                scanf("%d", a+i);
            for(int i=0; i<m; i++)
            {
                int x;
                scanf("%d", &x);
                b[x]++;
            }
            for(int i=1; i<n; i++)
            {
                ans+=abs(a[i]-a[i-1]);
                net.AddEdge(0, i, 1, 0);
                for(int j=0; j<=30; j++)
                    if(b[j])
                    {
                        int dis=abs(a[i]-j)+abs(a[i-1]-j)-abs(a[i]-a[i-1]);
                        net.AddEdge(i, n+j, 1, -dis);
                    }
            }
            int S=n+50, T=S+1;
            for(int i=0; i<=30; i++)
                if(b[i])
                    net.AddEdge(i+n, T, b[i], 0);
            net.AddEdge(S, 0, k, 0);
            printf("Case %d: %d
    ", ++kase, ans-net.MinCost(S, T));
        }
        return 0;
    } 
    
    
    

    另一个

    /*
    SPFA版费用流
    最小费用最大流,求最大费用最大流只需要取相反数,结果取相反数即可。
    点的总数为N,点的编号0~N-1
    */
    #include<iostream>
    #include<stdio.h>
    #include<string.h>
    #include<queue>
    #include<algorithm>
    using namespace std;
    
    const int MAXN=1500;
    const int MAXM=80000;
    const int INF=0x3f3f3f3f;
    struct Edge{
        int to,next,cap,flow,cost;
    }edge[MAXM];
    int head[MAXN],tol;
    int pre[MAXN],dis[MAXN];
    bool vis[MAXN];
    int N;//节点总个数,节点编号从0~N-1
    void init(int n){
        N=n;
        tol=0;
        memset(head,-1,sizeof(head));
    }
    void addedge(int u,int v,int cap,int cost){
        edge[tol].to=v;
        edge[tol].cap=cap;
        edge[tol].cost=cost;
        edge[tol].flow=0;
        edge[tol].next=head[u];
        head[u]=tol++;
        edge[tol].to=u;
        edge[tol].cap=0;
        edge[tol].cost=-cost;
        edge[tol].flow=0;
        edge[tol].next=head[v];
        head[v]=tol++;
    }
    bool spfa(int s,int t){
        queue<int>q;
        for(int i=0;i<N;i++){
            dis[i]=INF;
            vis[i]=false;
            pre[i]=-1;
        }
        dis[s]=0;
        vis[s]=true;
        q.push(s);
        while(!q.empty()){
            int u=q.front();
            q.pop();
            vis[u]=false;
            for(int i=head[u];i!=-1;i=edge[i].next){
                int v=edge[i].to;
                if(edge[i].cap>edge[i].flow&&dis[v]>dis[u]+edge[i].cost){
                    dis[v]=dis[u]+edge[i].cost;
                    pre[v]=i;
                    if(!vis[v]){
                        vis[v]=true;
                        q.push(v);
                    }
                }
            }
        }
        if(pre[t]==-1)return false;
        else return true;
    }
    //返回的是最大流,cost存的是最小费用
    int minCostMaxflow(int s,int t,int &cost){
        int flow=0;
        cost=0;
        while(spfa(s,t)){
            int Min=INF;
            for(int i=pre[t];i!=-1;i=pre[edge[i^1].to]){
                if(Min>edge[i].cap-edge[i].flow)
                    Min=edge[i].cap-edge[i].flow;
            }
            for(int i=pre[t];i!=-1;i=pre[edge[i^1].to]){
                edge[i].flow+=Min;
                edge[i^1].flow-=Min;
                cost+=edge[i].cost*Min;
            }
            flow+=Min;
        }
        return flow;
    }
    
    int main(){
    
        int T;
        int N2,M,K;
        int X[1005],Y[1005];
        int YNum[40];
        int i,j;
        int sp,sp2;//源点,源点2
        int sc;//汇点
        int sum;
        int tmp;
        int mi_cost;
        int ma_flow;
        int ca=0;
    
        scanf("%d",&T);
    
        while(T--){
    
            scanf("%d%d%d",&N2,&M,&K);
    
            init(N2+50);
    
            for(i=0;i<N2;++i){
                scanf("%d",&X[i]);
            }
            memset(YNum,0,sizeof(YNum));
            for(i=0;i<M;++i){
                scanf("%d",&Y[i]);
                ++YNum[Y[i]];
            }
    
            sum=0;
            for(i=0;i<N2-1;++i){//初始值
                sum=sum+abs(X[i]-X[i+1]);
            }
    
            sp=N2+40;
    
            for(i=0;i<N2-1;++i){//加边
                addedge(sp,i,1,0);//源点到空隙
                for(j=0;j<=30;++j){
                    if(YNum[j]){
                        tmp=abs(X[i]-j)+abs(X[i+1]-j)-abs(X[i]-X[i+1]);
                        addedge(i,N2+j,1,-tmp);//空隙到M个山丘
                    }
                }
            }
    
            sp2=N2+41;
            sc=N2+42;
            addedge(sp2,sp,K,0);
            for(i=0;i<=30;++i){
                if(YNum[i]){
                    addedge(N2+i,sc,YNum[i],0);
                }
            }
    
            ma_flow=minCostMaxflow(sp2,sc,mi_cost);
    
            printf("Case %d: %d
    ",++ca,sum-mi_cost);
        }
    
        return 0;
    }



    #include <iostream>  
    #include <stdio.h>  
    #include <cmath>  
    using namespace std;  
      
    int main()  
    {  
        int T;  
        scanf("%d",&T);  
        int i;  
        for(i=1;i<=T;i++)  
        {  
            int a,b,h;  
            scanf("%d%d%d",&a,&b,&h);  
            double V;  
            V=(4.0/3)*M_PI*a*b*b;  
            if(h>=b)  
            {  
                printf("Case %d: %.3lf
    ",i,V);  
            }  
            else  
            {  
                double v=M_PI*a*b*(b-h)-M_PI*(1.0*a/b)*(1.0/3)*(b*b*b-h*h*h);  
                if(V-v-v>0)  
                printf("Case %d: %.3lf
    ",i,V-v);  
                else  
                printf("Case %d: %.3lf
    ",i,v);  
            }  
        }  
        return 0;  
    }  


    E:Fruit Ninja II 

    #include <iostream>  
    #include <stdio.h>  
    #include <cmath>  
    using namespace std;  
      
    int main()  
    {  
        int T;  
        scanf("%d",&T);  
        int i;  
        for(i=1;i<=T;i++)  
        {  
            int a,b,h;  
            scanf("%d%d%d",&a,&b,&h);  
            double V;  
            V=(4.0/3)*M_PI*a*b*b;  
            if(h>=b)  
            {  
                printf("Case %d: %.3lf
    ",i,V);  
            }  
            else  
            {  
                double v=M_PI*a*b*(b-h)-M_PI*(1.0*a/b)*(1.0/3)*(b*b*b-h*h*h);  
                if(V-v-v>0)  
                printf("Case %d: %.3lf
    ",i,V-v);  
                else  
                printf("Case %d: %.3lf
    ",i,v);  
            }  
        }  
        return 0;  
    }  


    F:Chess



    G:n a^o7 !

    #include <iostream>  
    #include <cstdio>  
    #include <string>  
    #include <cstring>  
    #define MAX 500  
    using namespace std;  
    int main (){  
     char temp1[MAX],temp2[MAX],str[MAX];  
     strcpy(temp1," n5!wpuea^o7!usimdnaevoli");  
     strcpy(temp2," usimdnaevolin5!wpuea^o7!");  
     int Len = strlen(temp1);  
     int T;  
     scanf("%d",&T);  
     getchar();  
     int coun=1;  
     while(T--){  
       gets(str);  
       int len=strlen(str);  
       for(int i=0,j=0;i<len;i++){  
        for(j=0;j<Len;j++)  
           if(str[i]==temp1[j])  
              break;  
         if(j<Len) str[i]=temp2[j];  
       }  
       printf("Case %d: ",coun++);  
       for(int i=len-1;i>=0;i--)  
         printf("%c",str[i]);  
       printf("
    ");  
     }  
    return 0;  
    }  
      


    H:Pixel density

    #include<iostream>
    #include<stdio.h>
    #include<string.h>
    #include<math.h>
    using namespace std;
    
    char str[12345];
    
    char str1[12345];
    char str2[12345];
    
    char num1[12345];
    char num2[12345];
    char num3[12345];
    
    int main(){
    
        int T;
        int i;
        int len;
        int len1,len2;
        int p1,p2;
        int p3,p4;
        int len_num1,len_num2,len_num3;
        int j;
        double a,a1,a2,b,b1,b2,c,c1,c2;
        int p5;
        double Dp;
        double ans;
        int ca=0;
        int p6,p7;
    
        scanf("%d",&T);
        getchar();
        //scanf("%[^
    ]",str);
        //cout<<str<<endl;
    
        while(T--){
            scanf("%[^
    ]",str);
            getchar();
            //printf("");
            //printf("%s
    ",str);
            //cout<<str<<endl;
            len=strlen(str);
            //cout<<len<<endl;
    
            len1=0;
            len2=0;
            len_num1=0;
            len_num2=0;
            len_num3=0;
    
            for(i=0;i<len;++i){
                if(str[i]=='i'){
                    if(str[i+1]=='n'&&str[i+2]=='c'&&str[i+3]=='h'&&
                       str[i+4]=='e'&&str[i+5]=='s'&&str[i+6]==' '){
                           p1=i;
                           j=i-1;
                           while(str[j]==' '){
                                --j;
                           }
                           while(str[j]!=' '){
                                num1[len_num1++]=str[j--];
                           }
                           while(str[j]==' '){
                                --j;
                           }
                           p3=j;
                       }
                }
                if(str[i]=='*'){
                    if(i>=1&&'0'<=str[i-1]&&str[i-1]<='9'){
                        if('0'<=str[i+1]&&str[i+1]<='9'){
                            p2=i;
                            j=i-1;
                            while(str[j]!=' '){
                                num2[len_num2++]=str[j--];
                            }
    
                            j=i+1;
                            while(str[j]!=' '){
                                num3[len_num3++]=str[j++];
                            }
    
                            while(str[j]==' '){
                                ++j;
                            }
                            p4=j;
                        }
                    }
                }
    
            }
    
            for(i=0;i<=p3;++i){
                if(str[i]!=' '){
                    break;
                }
            }
            str1[len1++]=str[i++];
            for(;i<=p3;++i){
                if(str[i]==' '&&str1[len1-1]==' '){
                    continue;
                }
                str1[len1++]=str[i];
            }
            str1[len1]='';
    
    
            for(i=p4;i<len;++i){
                if(str[i]==' '&&str2[len2-1]==' '){
                    continue;
                }
                if('a'<=str[i]&&str[i]<='z'){
                    str2[len2++]=str[i];
                }
                else if('A'<=str[i]&&str[i]<='Z'){
                    str2[len2++]=str[i]+32;
                }
                else{
                    str2[len2++]=str[i];
                }
    
            }
            str2[len2]='';
    
            for(i=len2-1;i>=0;--i){
                if(str2[i]!=' '){
                    len2=i+1;
                    break;
                }
            }
            str2[i+1]='';
    
    /*
            cout<<str1<<endl;
            cout<<str2<<endl;
            cout<<num1<<endl;
            cout<<num2<<endl;
            cout<<num3<<endl;
            */
    
            p5=-1;
            for(i=0;i<len_num1;++i){
                if(num1[i]=='.'){
                    p5=i;
                    break;
                }
            }
            a=0;
            a1=0;
            a2=0;
            if(p5==-1){
                for(i=0;i<len_num1;++i){
                    a1=a1+(num1[i]-'0')*pow(10,i);
                }
            }
            else{
                //a2=0;
                for(i=0;i<p5;++i){
                    a2=a2/10+(num1[i]-'0')/10.0;
                }
                //a1=0;
                for(i=p5+1;i<len_num1;++i){
                    a1=a1+(num1[i]-'0')*pow(10,(i-(p5+1)));
                }
            }
    
    
            //cout<<a2<<endl;
            //cout<<a1<<endl;
            a=a1+a2;
    
            //cout<<"a:"<<a<<endl;
            if(a==0){
                printf("Case %d: The %s of %s's PPI is %.2f.
    ",++ca,str2,str1,0.0);
                continue;
            }
    
            p6=-1;
            for(i=0;i<len_num2;++i){
                if(num2[i]=='.'){
                    p6=i;
                    break;
                }
            }
            if(p6==-1){
                b=0;
                for(i=0;i<len_num2;++i){
                    b=b+(num2[i]-'0')*pow(10,i);
                }
            }
            else{
                b=0;
                b1=0;
                b2=0;
                //cout<<p6<<"***"<<endl;
                for(i=0;i<p6;++i){
                    b2=b2/10+(num2[i]-'0')/10.0;
                    //cout<<"##"<<b2<<endl;
                }
                for(i=p6+1;i<len_num2;++i){
                    b1=b1+(num2[i]-'0')*pow(10,(i-(p6+1)));
                }
                /*
                for(i=p5-1;i>=0;--i){
                    a2=a2/10+(num1[i]-'0')/10.0;
                }
                //a1=0;
                for(i=p5+1;i<len_num1;++i){
                    a1=a1+(num1[i]-'0')*pow(10,(i-(p5+1)));
                }
                */
                b=b1+b2;
    
                //cout<<"b:"<<b<<endl;
            }
    
    
            p7=-1;
            for(i=0;i<len_num3;++i){
                if(num3[i]=='.'){
                    p7=i;
                    break;
                }
            }
            if(p7==-1){
                c=0;
                for(i=0;i<len_num3;++i){
                    c=c*10+(num3[i]-'0');
                }
            }
            else{
                c=0;
                c1=0;
                c2=0;
                for(i=0;i<p7;++i){
                    //c2=c2/10+(num3[i]-'0')/10.0;
                    c1=c1*10+(num3[i]-'0');
                    //cout<<"##"<<c2<<endl;
                }
                for(i=p7+1;i<len_num3;++i){
                    //c1=c1+(num3[i]-'0')*pow(10,(i-(p7+1)));
                    c2=c2/10+(num3[i]-'0')/10.0;
                }
    
                c=c1+c2;
    
                //cout<<"c:"<<c<<endl;
            }
    
    
            //cout<<b<<endl;
            //cout<<c<<endl;
    
            Dp=sqrt(b*b+c*c);
            ans=Dp/a;
    
            //cout<<ans<<endl;
    
            printf("Case %d: The %s of %s's PPI is %.2f.
    ",++ca,str2,str1,ans);
        }
        /*
        33
        ip 00300.00600 inches 00500.00600*00700.00800 IPHone
    
    
    2
    iPhone 4S  3.5 inches 960*640 PHONE
    The new iPad  0009.7 inches 2048*1536 PAD
    
    
        */
    
        return 0;
    }




    I:The Best Seat in ACM Contest

    #include<iostream>
    #include<stdio.h>
    #include<string.h>
    using namespace std;
    
    int dir[4][2]={{-1,0},{1,0},{0,-1},{0,1}};
    
    int main(){
    
        int T;
        int N,M;
        int s[25][25];
        int v[25][25];
        int i,j;
        int a,b;
        int ma,ma_i,ma_j;
        int ca=0;
        int k;
    
        scanf("%d",&T);
    
        while(T--){
            scanf("%d%d",&N,&M);
    
            for(i=0;i<N;++i){
                for(j=0;j<M;++j){
                    scanf("%d",&s[i][j]);
                }
            }
    
            memset(v,0,sizeof(v));
    
            for(i=0;i<N;++i){
                for(j=0;j<M;++j){
                    for(k=0;k<4;++k){
                        a=i+dir[k][0];
                        b=j+dir[k][1];
                        if(a<0||b<0||a>=N||b>=M){
                            v[i][j]-=1;
                            continue;
                        }
                        if(s[a][b]>s[i][j]){
                            v[i][j]=v[i][j]+(s[a][b]-s[i][j]);
                        }
                        else{
                            v[i][j]=v[i][j]-(s[i][j]-s[a][b]);
                        }
                    }
                }
            }
    
            ma=v[0][0];
            ma_i=0;
            ma_j=0;
            for(i=0;i<N;++i){
                for(j=0;j<M;++j){
                    if(v[i][j]>=ma){
                        ma=v[i][j];
                        ma_i=i;
                        ma_j=j;
                    }
                }
            }
    
            printf("Case %d: %d %d %d
    ",++ca,ma,ma_i+1,ma_j+1);
        }
    
        return 0;
    }
    
    
    /**************************************
    	Problem id	: SDUT OJ I 
    	User name	: 666777 
    	Result		: Accepted 
    	Take Memory	: 512K 
    	Take Time	: 0MS 
    	Submit Time	: 2016-04-30 13:53:18  
    **************************************/
    


    J:Pick apples

    #include<iostream>
    #include<stdio.h>
    #include<algorithm>
    #include<string.h>
    using namespace std;
    
    struct node{
        long long S;
        long long P;
        double q;
    }a[3];
    
    bool cmp(node a,node b){
        return a.q>b.q;
    }
    
    int main(){
    
        int T;
        long long V;
        long long sum;
        long long dp[6000];
        long long tmp;
        int i,j;
        int ca=0;
    
    
        scanf("%d",&T);
    
        while(T--){
            scanf("%lld%lld",&a[0].S,&a[0].P);
            a[0].q=(double)(a[0].P)/a[0].S;
            //cout<<a[0].q<<endl;
            scanf("%lld%lld",&a[1].S,&a[1].P);
            a[1].q=(double)(a[1].P)/a[1].S;
            //cout<<a[1].q<<endl;
            scanf("%lld%lld",&a[2].S,&a[2].P);
            a[2].q=(double)(a[2].P)/a[2].S;
            //cout<<a[2].q<<endl;
            scanf("%lld",&V);
    
            sort(a,a+3,cmp);
    
            sum=V%a[0].S;
    
            for(i=1;;++i){
                if(a[0].S*i>=5000){
                    break;
                }
            }
    
            sum=sum+a[0].S*i;
    
            memset(dp,0,sizeof(dp));
    
            for(i=0;i<3;++i){
                for(j=a[i].S;j<=sum;++j){
                    tmp=dp[j-a[i].S]+a[i].P;
                    if(tmp>dp[j]){
                        dp[j]=tmp;
                    }
                }
            }
    
            for(i=sum;;--i){
                if(dp[i]>0){
                    break;
                }
            }
    
            printf("Case %d: %lld
    ",++ca,((V-sum)/a[0].S)*a[0].P+dp[i]);
    
        }
    
        return 0;
    }
    
    
    /**************************************
    	Problem id	: SDUT OJ J 
    	User name	: 666777 
    	Result		: Accepted 
    	Take Memory	: 556K 
    	Take Time	: 0MS 
    	Submit Time	: 2016-04-30 17:44:39  
    **************************************/
    


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  • 原文地址:https://www.cnblogs.com/zswbky/p/6718005.html
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