Submission #2840

#	Time	Username	Problem	Language	Result	Execution time	Memory
2840		ansol4328	다각형 (GA5_polygon)	C++98	0 / 100	0 ms	1088 KiB

polygon

#include<stdio.h>

int main()
{
    long long a, b, sum;

    scanf("%lld %lld",&a,&b);
    if(b%2==1) b--;
    if(b%2==0) sum=(b*(b+1)/2-b/2)/2+b/2;
    printf("%lld",sum-2);
    return 0;
}

• Subtask 1: 0 / 60
• Subtask 2: 0 / 10
• Subtask 3: 0 / 30