第13届景驰-埃森哲杯广东工业大学ACM程序设计大赛

A 跳台阶

#include<algorithm>
#include<iostream>
#include<vector>
 
 
using namespace std;
 
int main(){
    int T, n;
    cin >> T;
    while(T--){
        cin >> n;
        cout << (int)pow(2, n - 1) << endl;
    }
}

D psd面试

#include<algorithm>
#include<iostream>
#include<vector>
#include<cctype>
#include<cstdio>
#include<cstring>
#include<map>
 
using namespace std;
const int N = 1234 + 5;
int  f[N][N];
int LPS_Length(string s,int len){
    for (int i=len-1;i>=0;i--){
        f[i][i]=1;
        for (int j=i+1;j<len;j++){
            if (s[i]==s[j])
                f[i][j]=f[i+1][j-1]+2;
            else
                f[i][j]=max(f[i][j-1],f[i+1][j]);
        }
    }
    return f[0][len-1];
}
int main(){
    string str;
    while(cin >> str){
        for(auto &c: str) c = toupper(c);
        cout << str.length() - LPS_Length(str, int(str.length())) << endl;
    }
}

E 回旋星空

#include<algorithm>
#include<iostream>
#include<vector>
#include<cstdio>
#include<cstring>
#include<map>
 
using namespace std;
const int N = 1000 + 5;
struct point{
    double x, y;
}p[N];
int n;
void Work(){
 
}
 
double dist(point &p1, point &p2){
    return sqrt((p1.x - p2.x)*(p1.x - p2.x) + (p1.y - p2.y)*(p1.y - p2.y));
}
int main(){
    int T;
    scanf("%d", &T);
    while(T --){
        scanf("%d", &n);
        for(int i = 0; i < n; i++)
            scanf("%lf%lf",&p[i].x,&p[i].y);
        int cnt  = 0;
        for(int i = 0; i < n; i++){
            map<double, int> mat;
            for(int j = 0; j < n; j++){
                    if(i == j) continue;
                    double dis = dist(p[i], p[j]);
                    cnt += mat[dis];
                    mat[dis]++;
            }
        }
        if(cnt == 0)
            printf("WA
");
        else
            printf("%d
", cnt * 2);
    }
}

G 旋转矩阵

#include<algorithm>
#include<iostream>
#include<vector>
#include<cstdio>
#include<cstring>
 
using namespace std;
const int N = 50 + 5;
 
int n, m;
char mat[N][N], op[1000 + 5];
 
 
void Work(){
    int len = strlen(op);
    int cnt = 0;
    for(int i = 0; i < len; i++)
        if(op[i] == 'L') cnt = (cnt + 1) % 4;
        else cnt = (cnt - 1 + 4) % 4;
 
    if(cnt == 0){
        printf("%d %d
", n, m);
        for(int i = 0; i < n; i++){
 
            for(int j = 0; j < m; j++){
                if(mat[i][j] == '-'){
                    if(len & 1) printf("|");
                    else printf("-");
                }else if(mat[i][j] == '|'){
                    if(len & 1) printf("-");
                    else printf("|");
                }else printf("+");
            }printf("
");
        }
    }else if(cnt == 1){
        printf("%d %d
", m, n);
        for(int i =  m - 1; i >= 0; i--){
 
            for(int j = 0; j < n; j++){
                if(mat[j][i] == '-'){
                    if(len & 1) printf("|");
                    else printf("-");
                }else if(mat[j][i] == '|'){
                    if(len & 1) printf("-");
                    else printf("|");
                }else printf("+");
            }printf("
");
        }
    }else if(cnt == 2){
        printf("%d %d
", n, m);
        for(int i =  n - 1; i >= 0; i--){
 
            for(int j = m - 1; j >= 0; j--){
                if(mat[i][j] == '-'){
                    if(len & 1) printf("|");
                    else printf("-");
                }else if(mat[i][j] == '|'){
                    if(len & 1) printf("-");
                    else printf("|");
                }else printf("+");
            }printf("
");
        }
    }else{
        printf("%d %d
", m, n);
        for(int i = 0; i < m; i++){
 
            for(int j = n-1; j >= 0; j--){
                if(mat[j][i] == '-'){
                    if(len & 1) printf("|");
                    else printf("-");
                }else if(mat[j][i] == '|'){
                    if(len & 1) printf("-");
                    else printf("|");
                }else printf("+");
            } printf("
");
        }
    }
}
int main(){
    int T;
    scanf("%d", &T);
    while(T --){
        scanf("%d %d", &n, &m);
        for(int i = 0; i < n; i++)
            scanf("%s", mat[i]);
        scanf("%s", op);
        Work();
        printf("
");
    }
}

I 填空题 

#include<bits/stdc++.h>
 
using namespace std;
 
const int N = 1e4 + 5;
 
int pre[N];
int Find(int x){
    return (pre[x] == x ? x: pre[x] = Find(pre[x]));
}
 
void Merge(int x, int y){
    x = Find(x); y = Find(y);
    if(x != y) pre[y] = x;
}
 
int main(){
  cout << 'a' <<'c' << endl;
}

J 强迫症的序列

#include<algorithm>
#include<iostream>
#include<vector>
 
 
using namespace std;
 
vector<long long> v;
 
 
int main(){
    int n, T;
    long long x;
    scanf("%d", &T);
    while(T--){
        scanf("%d", &n);
        v.clear();
        for(int i = 0; i < n; i++){
            scanf("%lld", &x);
            v.push_back(x);
        }
        sort(v.begin(), v.end());
        long long cnt = 0;
        for(int i = 1; i < n; i++)
            cnt += v[i] - v[0];
 
        long long sum = 0;
 
        for(int i = 0; i < n - 1; i++)
            sum += v[n-2] - v[i];
 
        printf("%lld %lld
", cnt,cnt + v[0]);
    }
 
}

L 用来作弊的药水

#include<algorithm>
#include<iostream>
#include<vector>
 
 
using namespace std;
using LL = long long;
 
 
LL QuickMod(LL x, LL n, LL mod){
    LL ret = 1;
    while(n > 0){
        if(n & 1) ret = ret * x % mod;
        x = x * x %  mod;
        n >>= 1;
    }
    return ret;
}
 
int main(){
    int T;
    LL x, a, y, b;
    cin >> T;
    while(T --){
        cin >> x >> a >> y >> b;
        bool flag = true;
        for(int i = 1; i <= 100; i++){
            LL mod = rand() + 1;
            LL c1 = QuickMod(x, a, mod);
            LL c2 = QuickMod(y, b, mod);
            if(c1 != c2) {flag = false; break; }
        }
        if(flag) cout << "Yes" << endl;
        else cout << "No" << endl;
    }
}