# include<iostream> # include<cstring> using namespace std; int k[100]; int main(){ int n,a,b,c; cin >>n; for(int i=1;i<=n;i++){ cin >>a>>b>>c; k[a]++; k[b]++; k[c]++; } int max=0,l; for(int i=1;i<=n;i++){ if(k[i]<max){ max=k[i]; l=i; } } cout <<l; return 0; }