Submission #3887046

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Source Code Expand

#include<stdio.h>
long long n,mod=1000000007;
int main()
{
    scanf("%lld",&n);
	if(n<=8)
	{printf("0\n");
	return 0;}
	long long ret=(n-6)/2;
	ret%=mod;
	ret=ret*(ret+mod-1);
	ret%=mod;
	if(ret%2==1)
	ret+=mod;
    ret/=2;
	if(n%2==1)
	{ret+=((n-7)/2+1)/2;}
	ret%=mod;
	printf("%lld\n",ret);
	return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:5:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld",&n);
     ^

Judge Result