#include "bits/stdc++.h" using namespace std; int n; char a[4]={'0','x','y','z'}; int wa=0,wb=0,wc=0; int main(){ cin>>n; while(n--){ int i,j,k; cin>>i>>j>>k; swap(a[i],a[j]); if(a[k]=='x')wa++; else if(a[k]=='y')wb++; else wc++; } if(wa>=wb&&wa>=wc)cout<<wa; else if(wb>=wa&&wb>=wc)cout<<wb; else if(wc>=wa&&wc>=wb)cout<<wc; }