UVA - 1605 Building for UN （联合国大楼）

#pragma comment(linker, "/STACK:102400000, 102400000")
#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<cctype>
#include<cmath>
#include<iostream>
#include<sstream>
#include<iterator>
#include<algorithm>
#include<string>
#include<vector>
#include<set>
#include<map>
#include<stack>
#include<deque>
#include<queue>
#include<list>
#define Min(a, b) ((a < b) ? a : b)
#define Max(a, b) ((a < b) ? b : a)
typedef long long ll;
typedef unsigned long long llu;
const int INT_INF = 0x3f3f3f3f;
const int INT_M_INF = 0x7f7f7f7f;
const ll LL_INF = 0x3f3f3f3f3f3f3f3f;
const ll LL_M_INF = 0x7f7f7f7f7f7f7f7f;
const int dr[] = {0, 0, -1, 1, -1, -1, 1, 1};
const int dc[] = {-1, 1, 0, 0, -1, 1, -1, 1};
const int MOD = 1e9 + 7;
const double pi = acos(-1.0);
const double eps = 1e-8;
const int MAXN = 10000 + 10;
const int MAXT = 10000 + 10;
using namespace std;
map<int, char> mp;
void init(){
    string s = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
    for(int i = 0; i < 52; ++i){
        mp[i] = s[i];
    }
}
int main(){
    int n;
    init();
    bool flag = true;
    while(scanf("%d", &n) == 1){
        if(flag) flag = false;
        else printf("\n");
        printf("2 %d %d\n", n, n);
        for(int i = 0; i < n; ++i){
            for(int j = 0; j < n; ++j){
                printf("%c", mp[i]);
            }
            printf("\n");
        }
        printf("\n");
        for(int i = 0; i < n; ++i){
            for(int j = 0; j < n; ++j){
                printf("%c", mp[j]);
            }
            printf("\n");
        }
    }
    return 0;
}