This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
#define endl "\n";
void solve(){
int n, res = 0;
string jeden, dwa;
cin >> n;
vector<string> lista(n, "");
for(int i = 0; i < n; i++){
cin >> jeden >> dwa;
lista[i] += jeden + dwa;
for(int j = i - 1; j >= 0; j--){
if(lista[i][0] == lista[j][2] && lista[i][1] == lista[j][3]) res++;
else if(lista[i][2] == lista[j][0] && lista[i][3] == lista[j][1]) res++;
else if(lista[i][1] == lista[j][0] && lista[i][3] == lista[j][2]) res++;
else if(lista[i][0] == lista[j][1] && lista[i][2] == lista[j][3]) res++;
}
}
cout << res << endl;
}
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
//freopen("input.txt", "r", stdin);
solve();
}
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