Submission #7778

#	Time	Username	Problem	Language	Result	Execution time	Memory
7778		gs13105	다각형 (GA5_polygon)	C++98	100 / 100	0 ms	1088 KiB

polygon

#include <stdio.h>
 
int main()
{
    long long a,b,n,s;
    scanf("%lld%lld",&a,&b);
    if(a%2==1)
        a++;
    n=(b-a)/2+1;
    s=n*(a+n-1);
    if(a==2)
        s-=2;
    printf("%lld",s);
    return 0;
}

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