View Code of Problem 3689

#include<stdio.h>
int main()
{
	int t,k=1;
	scanf("%d",&t);
	while (t--){
	long long a;
	long long b;
	scanf("%lld",&a);
	scanf("%lld",&b);
	if(a>=b)
	{
	printf("Case #%d:\n",k);
	k=k+1;
	printf("%lld\n",a-b);}
	else
	{
	printf("Case #%d:\n",k);
	k=k+1;
	printf("-%lld\n",b-a);}
	}
	return 0;
}