#include <iostream>
#include <bits/stdc++.h>
using namespace std;
int main(){
vector<int> a{40,20,60};
int c=0;
for(int i=0;i<a.size();i++){
for(int j=0;j<a.size();j++){
if(a[j]!=a[i]){
if((a[j]+a[i])%60==0) c++;
}
}
}
cout<<c/2;
return 0;
}
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