Submission #1832892

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int N = 303;
const int inf = (int)1e9 + 7;

int dp[N][N][N];

int mult (int a, int b) {
    return (ll) a * b % inf;
}

int add (int a, int b) {
    a += b;
    if (a >= inf) a -= inf;
}

main() {
    int n, m; 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 l = 1; l <= n; l++) {
                int delta = dp[i][j][l];
                if (delta == 0) continue;
                dp[i + 1][j + 1][l] = mult(delta, (n - j));
                dp[i + 1][j][l] = mult(delta, j - l);
                dp[i + 1][j][j] = mult(delta, l);
            }
        }
    }
    cout << dp[m][n][n];
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:22:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     int n, m; scanf ("%d %d", &n, &m);
                                      ^

Judge Result