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  • 【HDU】3255 Farming

      1 #include<cstdio>
      2 #include<cstring>
      3 #include<algorithm>
      4 typedef __int64 LL;
      5 #define MAXN 30010
      6 using namespace std;
      7 struct Plant
      8 {
      9     int x1,y1,x2,y2,s;
     10 };
     11 struct Seg
     12 {
     13     int left,right,high,flag;
     14     friend bool operator<(Seg a,Seg b)
     15     {
     16         if(a.high==b.high)
     17             return a.flag<b.flag;
     18         return a.high<b.high;
     19     }
     20 };
     21 struct node
     22 {
     23     int val,cover;
     24 }tree[MAXN<<3];
     25 Seg s[MAXN<<1];
     26 Plant p[MAXN];
     27 int price[4],X[MAXN<<1];
     28 inline void PushUp(int L,int R,int rt)
     29 {
     30     if(tree[rt].cover)
     31         tree[rt].val=X[R+1]-X[L];
     32     else
     33     {
     34         if(L==R)
     35             tree[rt].val=0;
     36         else
     37             tree[rt].val=tree[rt<<1].val+tree[rt<<1|1].val;
     38     }
     39 }
     40 void Update(int x,int y,int flag,int L,int R,int rt)
     41 {
     42     if(x<=L&&R<=y)
     43     {
     44         tree[rt].cover+=flag;
     45         PushUp(L,R,rt);
     46     }
     47     else
     48     {
     49         int mid=(L+R)>>1;
     50         if(x<=mid)
     51             Update(x,y,flag,L,mid,rt<<1);
     52         if(y>mid)
     53             Update(x,y,flag,mid+1,R,rt<<1|1);
     54         PushUp(L,R,rt);
     55     }
     56 }
     57 int main()
     58 {
     59     LL temp,ans;
     60     int t,n,m,i,j,cnt,nx,x,y,ca=1;
     61     scanf("%d",&t);
     62     while(t--)
     63     {
     64         scanf("%d%d",&n,&m);
     65         m++;
     66         price[0]=0;
     67         for(i=1;i<m;i++)
     68             scanf("%d",&price[i]);
     69         for(i=nx=0;i<n;i++)
     70         {
     71             scanf("%d%d%d%d%d",&p[i].x1,&p[i].y1,&p[i].x2,&p[i].y2,&p[i].s);
     72             p[i].s=price[p[i].s];
     73             X[nx++]=p[i].x1;
     74             X[nx++]=p[i].x2;
     75         }
     76         sort(price,price+m);
     77         sort(X,X+nx);
     78         nx=unique(X,X+nx)-X;
     79         ans=0;
     80         memset(tree,0,sizeof(tree));
     81         for(i=1;i<m;i++)
     82         {
     83             for(j=cnt=0;j<n;j++)
     84             {
     85                 if(p[j].s>=price[i])
     86                 {
     87                     s[cnt].left=p[j].x1;
     88                     s[cnt].right=p[j].x2;
     89                     s[cnt].high=p[j].y1;
     90                     s[cnt++].flag=1;
     91                     s[cnt].left=p[j].x1;
     92                     s[cnt].right=p[j].x2;
     93                     s[cnt].high=p[j].y2;
     94                     s[cnt++].flag=-1;
     95                 }
     96             }
     97             sort(s,s+cnt);
     98             for(temp=j=0;j<cnt;j++)
     99             {
    100                 x=lower_bound(X,X+nx,s[j].left)-X;
    101                 y=lower_bound(X,X+nx,s[j].right)-X;
    102                 Update(x,y-1,s[j].flag,0,nx-2,1);
    103                 if(j+1<cnt)
    104                     temp+=(LL)(s[j+1].high-s[j].high)*tree[1].val;
    105             }
    106             ans+=temp*(price[i]-price[i-1]);
    107         }
    108         printf("Case %d: %I64d\n",ca++,ans);
    109     }
    110     return 0;
    111 }
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  • 原文地址:https://www.cnblogs.com/DrunBee/p/2552690.html
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