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;
int N,rj;
string a,b;
string karte[456976];
int main()
{
cin>>N;
for(int i=0;i<N;i++)
{
cin>>a>>b;
karte[i]=a+b;
}
for(int i=0;i<N;i++)
{
for(int j=i+1;j<N;j++)
{
string s=karte[i];
string t=karte[j];
if(s.substr(2,3)==t.substr(0,1))
rj++;
else if(s.substr(0,1)==t.substr(2,3))
rj++;
else if((s[1]+s[3])==(t[0]+t[2]))
rj++;
else if((s[0]+s[2])==(t[1]+t[3]))
rj++;
}
}
cout<<rj;
}
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