#include "bits/stdc++.h" using namespace std; int main(){ int ans=0,n,a[5],b[5],g[5]; cin>>n; while(n--){ for(int i=0;i<n;i++){ cin>>a[i]>>b[i]>>g[i]; if(g[i]==a[i]||g[i]==b[i])ans++; } } cout<<ans; }