#include<iostream> #include<cstdio> using namespace std; int main(){ long long int i,j,n,s=0,max=999999999; cin>>n; long long int x[n+1],y[n+1],t[n+1]; for(i=1;i<=n;i++){ cin>>x[i]>>y[i]>>t[i]; } for(j=1;j<=n;j++){ s=0; t[i]=i; for(i=1;i<=n;i++){ if(x[i]==t[i]){ t[i]=y[i]; } if(y[i]==t[i]){ t[i]=x[i]; } if(t[i]==x[i]){ s++; } if(t[i]==y[i]){ s++; } } if(max<s){ max=s; } } cout<<s; return 0; }