Submission #5485401

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Source Code Expand

///usr/bin/g++ -O2 $0 -o ${0%.cpp} && echo "----------" && ./${0%.cpp}; exit;
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> ii; 

const int N = 1e5 + 10; 
const int mod = 1e9 + 7; 

int n, m, fact[N]; 

int main(int argc, char const *argv[]) {
    fact[0] = 1; 
    for(int i = 1; i < N; ++i) 
        fact[i] = (ll) fact[i - 1] * i % mod; 

    scanf("%d %d", &n, &m); 

    if(abs(n - m) > 1) puts("0"); 
    else {
        ll ans = (ll) fact[n] * fact[m] % mod;
        if(n == m) ans = 2ll * ans % mod; 
        printf("%lld\n", ans); 
    }
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main(int, const char**)’:
./Main.cpp:18:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m); 
                           ^

Judge Result