제출 #4782

#제출 시각아이디문제언어결과실행 시간메모리
4782gs13068다각형 (GA5_polygon)C++98
60 / 100
0 ms1088 KiB
#include<cstdio>

int get(int x)
{
  if(x<2)return 0;
  return (x/2)*(x/2+1)-2;
}
 
int main()
{
  int a,b;
  scanf("%d%d",&a,&b);
  printf("%d",get(b)-get(a-1));
}
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