| # | Time | Username | Problem | Language | Result | Execution time | Memory | 
|---|---|---|---|---|---|---|---|
| 2816 | gs13105 | 다각형 (GA5_polygon) | C++98 | 0 ms | 1088 KiB | 
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <stdio.h>
int main()
{
	long long a,b,n;
	scanf("%lld%lld",&a,&b);
	if(a%2==1)
		a++;
	n=(b-a)/2+1;
	printf("%lld",n*(a+n-1));
	return 0;
}
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