Toph-Easy Summation

C
#include<stdio.h>
#include<stdlib.h>
int main()
{
   long long int t,n,i=1;

   scanf("%lld",&t);

   for(i=1;i<=t;i++)
   {
       scanf("%lld",&n);
       printf("Case %lld: %lld\n",i,n*n);

   }

   return 0;

}