Submission #7779

#	Time	Username	Problem	Language	Result	Execution time	Memory
7779		qja0950	다각형 (GA5_polygon)	C++98	100 / 100	0 ms	1088 KiB

polygon

#include <stdio.h>

long long a, b;

int main() {
	long long result = 0;
	scanf("%lld %lld", &a, &b);
	if(a%2==1) a++;
	if(a==2) a=4;
	if(b%2==1) b--;

	if(b<a) printf("0");
	else{
		result = (a + b) * ( (b - a) / 2 + 1 ) / 2;
		printf("%lld", result);
	}
}

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