KIIT Coding Weekends problem in submission

general
1

in the KIIT Coding Weekends competition I tried the Large Products problem. My code works successfully on CodeBlocks and ideone.com it results in a ‘Wrong Answer’ in the codeChef IDE.
Can anyone try to help me…
here is my code…

#include <iostream>

using namespace std;

int main()
{

long long n;
cin>>n;
long long a[n];
for(long long i=0;i<n;i++)
{
    cin>>a[i];
    
}
long long p=1;
for(long long  i=0;i<n;i++)
{
    p*=a[i];
}
cout<<p+(1000000007)%(1000000007)<<" "<<endl;

}

2

Don’t post questions related to ongoing contest…

3

You should do the modulus at each step of multiplication so that the answer doesn’t become out of bound before we reach the last element . And use unsigned long long int for maximum number that can be stored .