IOPAC13K Chocolates

What runtime error is there in this problem???

 #include<stdio.h>
#include<math.h>
int fac(int n){
    int c;
    short unsigned fact=1;
    for (c = 1; c <= n; c++)
    fact = fact * c;
    return fact;
}
int main(void){
    short unsigned T, temp, k=0, i, z, N, ans[100000];
    scanf("%hu", &T);
    for(temp=0; temp<T; temp++){
        scanf("%d", &N);
        for(i=0; i<=N; i++)
            k=k+(fac(N+i)/((fac(N-i))*(fac(i))*(fac(i))));
        z=k%(N*N);
        ans[temp]=(N*N)-z;
    }
    for(temp=0; temp<T; temp++)
        printf("\n%hu", ans[temp]);        
    return 0;
}  

Help ASAP
Thanks in advance
Daksh

Hey Daksh,

Are you even getting the correct outputs for the required inputs using your algorithm? I ran your code on ideone, and used 4 as the number of test cases, 2, 3, 5 and 7 as the inputs, and it gave me the wrong output. Even for 2, the answer from your program is 0, not 1, which is the right answer. Or, am I missing something here?

Also, for a variable of type unsigned short, maximum value is 65535 (0xffff), and the limit of test cases in the problem is given as 1 ≤ T ≤ 10^5, so it will fail in that case. That can be the reason for runtime error.

@oldschoolburke: I had uploaded with long unsigned int, but it still gave runtime error.
And the program gives the correct output. Even for 2, it gives 1 and not 0. Please check this link: http://ideone.com/UyTr0g
I have uploaded the code there and the output is correct. please check

What runtime error is it giving? post your solution link on codechef

my solution link: http://www.codechef.com/viewsolution/1925048

//