#include<iostream> using namespace std; int main(){ int n; int a[5]={0,1,2,3,4}; int q[5]={0}; cin>>n; for(int i=0;i<n;i++) { int x,y,g; cin>>x>>y>>g; swap(a[x],a[y]); q[a[g]]++; } cout<<max(q[1],max(q[2],q[3])); return 0; }