#include "bits/stdc++.h" using namespace std; int main(){ int q[105],ans=0,n,a[5],b[5],g[5]; cin>>n; for(int i=0;i<n;i++){ cin>>n[i]>>a[i]>>g[i]; if(g[i]==n[i]&&g[i]==a[i])ans++; } cout<<ans; }