include <bits/stdc++.h>

using namespace std; using ll = long long int;

int main(){ ios::sync_with_stdio(0); cin.tie(0);

string bit_str;
int n;
cin>>n;
bitset<3000> rows[n];
for (int i = 0; i < n ; ++i) {
    cin>>bit_str;
    for (int j = 0; j < n; ++j) {
        rows[i] = bitset<3000>(bit_str);
    }
}
ll my_subgrids{};
int count;
for (int a = 0; a < n; ++a) {
    for (int b = a+1; b < n; ++b) {
        count = (rows[a]&rows[b]).count();  // Can this be optimised further ??
        my_subgrids+=(count*(count-1))/2;
    }
}
cout<<my_subgrids<<"\n";

return 0;

}