UVa1605 Building for UN (构造法)

 1 #include <cstdio>
 2 
 3 int n;
 4 
 5 int main() {
 6     while (scanf("%d", &n) == 1) {
 7         printf("2 %d %d\n", n, n);
 8         for (int i = 0; i < n; i++) {
 9             for (int j = 0; j < n; j++)
10                 putchar(i < 26 ? ‘a‘ + i : ‘A‘ + i - 26);
11                 printf("\n");
12         }
13 
14         printf("\n");
15         for (int i = 0; i < n; i++) {
16             for (int j = 0; j < n; j++)
17                 putchar(j < 26 ? ‘a‘ + j : ‘A‘ + j - 26);
18                 printf("\n");
19         }
20         printf("\n");
21     }
22     return 0;
23 }