题目大意：给你L到N的范围，要求你求这个范围内的所有整数的立方和。
Sample Input
2 //T
1 3
2 5
Sample Output
Case #1: 36
Case #2: 224
# include <iostream>
# include <cstdio>
# include <cstring>
# include <algorithm>
# include <cmath>
# define LL long long
using namespace std ; int main ()
{
//freopen("in.txt","r",stdin) ;
int T ;
cin>>T ;
int Case = ;
while(T--)
{
Case++ ;
LL a , b ;
cin>>a>>b ;
LL i , sum = ;
for (i = a ; i <= b ; i++)
sum += i*i*i ;
cout<<"Case #"<<Case<<": "<<sum<<endl ;
} return ;
}