UVA 12036

#include <stdio.h>
int main() {
    int t, n, x, Case = 0;
    scanf("%d", &t);
    while(t--) {
        scanf("%d", &n);
        int count[101] = {};
        int i, j, flag = 1;
        for(i = 0; i < n; i++) {
            for(j = 0; j < n; j++) {
                scanf("%d", &x);
                count[x]++;
                if(count[x] > n)
                    flag = 0;
            }
        }
        printf("Case %d: ", ++Case);
        if(flag == 1)   puts("yes");
        else            puts("no");
    }
    return 0;
}