| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 7780 | gs13023 | 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<cstdio>
long long f(int n)
{
int t=n/2;
return t*(t+1);
}
int main()
{
int a,b;
scanf("%d%d",&a,&b);
printf("%lld",f(b)-f(a-1));
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