Submission #992457

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Source Code Expand

#include <cstdio>
#include <algorithm>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <cstring>
#include <string>
#include <cmath>
#include <cstdlib>
#include <iostream>

using namespace std;

#define MOD 1000000007
#define ADD(X,Y) ((X) = ((X) + (Y)) % MOD)
typedef long long i64; typedef vector<int> ivec; typedef vector<string> svec;

int N, M;
i64 dp[303][303][303]; // day, unvis, size of 0 unit

int main()
{
	scanf("%d%d", &N, &M);
	for (int i = 0; i <= M; ++i) {
		for (int j = 0; j <= N; ++j) {
			for (int k = 0; k <= N; ++k) {
				dp[i][j][k] = 0;
			}
		}
	}
	dp[0][N - 1][1] = 1;
	for (int i = 0; i < M; ++i) {
		for (int j = 0; j <= N; ++j) {
			for (int k = 0; k <= N; ++k) if (dp[i][j][k]) {
				ADD(dp[i + 1][j][N - j], k * dp[i][j][k]);
				if (j > 0) ADD(dp[i + 1][j - 1][k], j * dp[i][j][k]);
				ADD(dp[i + 1][j][k], (N - k - j) * dp[i][j][k]);
			}
		}
	}
	printf("%lld\n", dp[M][0][N]);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:25:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &M);
                       ^

Judge Result