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답안 #2879

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
2879 2013-08-01T09:22:33 Z cki86201 다각형 (GA5_polygon) C++
100 / 100
 0 ms 1088 KB 
#include<stdio.h>

long long int sum(int x)
{
	if(x<2)return 0;
	x/=2;
	long long int ret=x;
	return ret*(ret+1)-2;
}

int main()
{
	int a,b;scanf("%d%d",&a,&b);
	printf("%lld",sum(b)-sum(a-1));
	return 0;
}

Subtask #1
60.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 1088 KB Output is correct
2 Correct 0 ms 1088 KB Output is correct
3 Correct 0 ms 1088 KB Output is correct
4 Correct 0 ms 1088 KB Output is correct
5 Correct 0 ms 1088 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 1088 KB Output is correct
2 Correct 0 ms 1088 KB Output is correct
3 Correct 0 ms 1088 KB Output is correct
4 Correct 0 ms 1088 KB Output is correct
5 Correct 0 ms 1088 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 1088 KB Output is correct
2 Correct 0 ms 1088 KB Output is correct
3 Correct 0 ms 1088 KB Output is correct
4 Correct 0 ms 1088 KB Output is correct
5 Correct 0 ms 1088 KB Output is correct