Submission #7809

#	Time	Username	Problem	Language	Result	Execution time	Memory
7809		Fakeable	다각형 (GA5_polygon)	C++98	100 / 100	0 ms	1088 KiB

polygon

#include<cstdio>
int main()
{
	long long int n,n_,m,sum=0;
	scanf("%lld %lld",&n,&m);
	if(n==1 && m==1) { printf("0"); return 0; }
	n_=n;
	m/=2;
	if(n%2==0) n=n/2-1;
	else n=n/2;
	sum=m*(m+1)-n*(n+1);
	if(n_<3) sum-=2;
	printf("%lld",sum);
	return 0;
}

• Subtask 1: 60 / 60
• Subtask 2: 10 / 10
• Subtask 3: 30 / 30