C++ Coding for SriLanka NIC birth year finding

#include<iostream>
using namespace std;
int main()
{
int nu,s,g;
cout<<"Enter the NIC number";
cin>>nu;
// Year
s=nu/10000000%100;
cout<<"You was born in 19"<<s<<endl;
// gender
g=nu/10000%1000;
if (g<500)
{
cout<<"You are male";
}

else if(g>500)
{
cout<<"You are female";
}

return 0;
}