Submission #3932369

---

Source Code Expand

#include <cstdio>

const int mod = 1e9+7;
int n, m;
long long dp[303][303][303];

int main() {
    scanf("%d %d", &n, &m);

    dp[0][1][1] = 1;
    for (int i = 0; i <= m; i++) {
        for (int j = 1; j <= n; j++) {
            for (int k = 1; k <= j; k++) {
                long long now = dp[i][j][k];
                dp[i+1][j+1][k] += now*(n-j)%mod;
                dp[i+1][j][k] += now*(j-k)%mod;
                dp[i+1][j][j] += now*k%mod;
            }
        }
    }

    printf("%lld\n", dp[m][n][n] % mod);

    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:8:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
                           ^

Judge Result