Submission #2907

#	Time	Username	Problem	Language	Result	Execution time	Memory
2907		zyslee	다각형 (GA5_polygon)	C++98	100 / 100	0 ms	1088 KiB

polygon

#include <stdio.h>
int main()
{
	long long int a, b, ans;
	scanf("%lld %lld", &a, &b);
	if(b<3){
		printf("0");
		return 0;
	}
	if(a<3) a = 3;
	if(a%2==1) a++;
	if(b%2==1) b--;
	if(((b-a)/2+1)%2==0) ans = (a+b)*((b-a)/2+1)/2;
	else ans = a+(a+2+b)*(b-a)/4;
	printf("%lld", ans);
}

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