Getting WA in Make it Divisible problem

Code- Solution: 51410896 | CodeChef
Can anyone please give me a case where my code is failing.
Thanks for help in advance.

if (n == 2) you are printing 12 which is even, they want only odd numbers.

here is my approch
we can come to a general solution for all n

code

ohh, that is a very silly mistake.
Thanks alot for pointing out.

Thank you.

void solve(){
     int n; cin>>n;
     cout << 3;
     for(int i=1;i<n-1;i++) cout << '0';
     if(n>1)cout << 3;
}
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