제출 #2886

#제출 시각아이디문제언어결과실행 시간메모리
2886zyslee다각형 (GA5_polygon)C++98
0 / 100
0 ms1088 KiB
#include<stdio.h>
int main()
{
	int a, b, aa, bb;
	scanf("%d %d", &a, &b);
	aa = (a-1)/2;
	bb = (b+1)/2;
	printf("%d", ((bb*(bb+1)/2)-(aa*(aa+1)/2))*2);
	return 0;
}
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