Geeksforgeeks Solution For " Ball coloring "

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Problem :- Ball coloring  

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Solution :- 

#include <stdio.h>

int main() 
{
int t,i;
unsigned long long int n,no;
scanf("%d",&t);
while(t--)
{
   scanf("%llu",&n);
   no=(n*(n-1));
   printf("%llu\n",(no+2));
}
return 0;
}

Output:-