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DCP-167.c

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#include<stdio.h>

int main()

{

int t,n,i;

scanf("%d",&t);

for(i=1;i<=t;i++){

int sum1,sum2;

scanf("%d",&n);

sum1=n*(n+1)/2;//equation /*both of these line can be writen in same formula*/

sum2=sum1*sum1;//equation

printf("Case %d: %d\n",i,sum2);

}

return 0;

}