Submission #2101666

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Source Code Expand

#include <cstdio>
#include <iostream>
#define ll long long
using namespace std;
const int mod = 1e9 + 7;
int main()
{
	int n,x,k(0);ll ans(1);
	ios::sync_with_stdio(false);cin.tie(0);
	cin>>n;
	for(register int i(1);i <= n;i++)
	{
		scanf("%d",&x),++k;
		if(x < (k << 1) - 1) {ans *= k,--k;if(ans >= mod) ans %= mod;}
	}
	while(k) {ans *= k,--k;if(ans >= mod) ans %= mod;}
	cout<<ans; 
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:13:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&x),++k;
                     ^

Judge Result