#include<cstdio>#include<cstring>#define MAXN 105int N, arr[MAXN][MAXN];int x_used[MAXN][11], y_used[MAXN][11], n_used[MAXN][11];int main() { while(scanf("%d", &N) != EOF) { memset(x_used, 0, sizeof(x_used)); memset(y_used, 0, sizeof(y_used)); memset(n_used, 0, sizeof(n_used)); bool flag = true; for(int i = 0; i < N * N; ++ i) { for(int j = 0; j < N * N; ++ j) { scanf("%d", &arr[i][j]); if(arr[i][j] > 0 && flag) { if(x_used[i][arr[i][j]] == 1) { flag = false; } else { x_used[i][arr[i][j]] = 1; } if(y_used[j][arr[i][j]] == 1) { flag = false; } else { y_used[j][arr[i][j]] = 1; } if(n_used[i / N * N + j / N + 1][arr[i][j]] == 1) { flag = false; } else { n_used[i / N * N + j / N + 1][arr[i][j]] = 1; } } } } if(flag) { printf("CORRECTn"); } else { printf("INCORRECTn"); } } return 0;}
