wrong answer how?

my code:
codechef gives me wrong anwer
problem_code: (FCTRL2)
for(int j = 0;j<T;j++)
{
cin>>n;

	if((n==1) || (n==0))
	{
		ans = 1;
				
	}
	else
	{
		for(int i = 1; i <=n; ++i)
		{
		        ans = ans * i;
   		}
	}
	
	a[j] = ans;
}

See the range in that problem. Seen? Yes it is 1 to 100. The max factorial calculation done with above logic is 21(even not 22) because no datatype can store such a large value generated after computations so u must consider solving it with array or use Bigint lib in c++.

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Here is the link

https://discuss.codechef.com/questions/7349/computing-factorials-of-a-huge-number-in-cc-a-tutorial

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