Submission #2728

#	Time	Username	Problem	Language	Result	Execution time	Memory
2728		gs13068	다각형 (GA5_polygon)	C++98	100 / 100	0 ms	1088 KiB

polygon

#include<cstdio>

long long get(long long x)
{
  if(x<2)return 0;
  return (x/2)*(x/2+1)-2;
}

int main()
{
  long long a,b;
  scanf("%lld%lld",&a,&b);
  printf("%lld",get(b)-get(a-1));
}

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