?? 2312.cpp
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/* This Code is Submitted by wywcgs for Problem 2312 on 2006-08-07 at 12:20:03 */
#include <cstdio>
typedef long long int64;
int main()
{
int t, T;
scanf("%d", &T);
for(t = 0; t < T; t++) {
int64 a, b; scanf("%lld %lld", &a, &b);
printf("Scenario #%d:\n%lld\n\n", t+1, (a+b)*(b-a+1)/2);
}
return 0;
}
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