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답안 #7784

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
7784 2014-08-19T10:08:56 Z gs13023 다각형 (GA5_polygon) C++
100 / 100
 0 ms 1088 KB 
#include<cstdio>
long long f(int n)
{
  if(n<4)return 2;
  long long t=n/2;
  return t*(t+1);
}
int main()
{
  int a,b;
  scanf("%d%d",&a,&b);
  printf("%lld",f(b)-f(a-1));
}

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