Submission #7822

#	Time	Username	Problem	Language	Result	Execution time	Memory
7822		gs13073	다각형 (GA5_polygon)	C++98	100 / 100	0 ms	1088 KiB

polygon

#include<stdio.h>

int main()
{
  long long t,a,b;
  scanf("%lld %lld",&a,&b);
  if(b<4){printf("0");return 0;}
  if(a==b){printf("%lld",a%2?0:a);return 0;}
  if(a<4)a=4;
  if(a%2)a++;
  if(b<4)b=4;
  if(b%2)b--;
  a/=2;b/=2;
  t=b*(b+1)/2-a*(a-1)/2;
  printf("%lld",t*2);
  return 0;
}

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