Solution-CF268-D2-A

#include <iostream>

using namespace std;

int main()
{
    int numberOfTeams;
    cin>>numberOfTeams;
    int teamUniforms[numberOfTeams][2];
    int guestUniform=0;
    for(int index1=0;index1<numberOfTeams;index1++){
        cin>>teamUniforms[index1][0];
        cin>>teamUniforms[index1][1];
    }
    for(int index2=0;index2<numberOfTeams;index2++){
        for(int index3=index2+1;index3<numberOfTeams;index3++){
            if(teamUniforms[index2][0]==teamUniforms[index3][1] || teamUniforms[index2][1]==teamUniforms[index3][0]){
                guestUniform++;
            }
            if(teamUniforms[index2][0]==teamUniforms[index3][1] && teamUniforms[index2][1]==teamUniforms[index3][0]){
                guestUniform++;
            }
        }
    }
    cout<<guestUniform<<endl;
    return 0;
}