#include <bits/stdc++.h> using namespace std; int a[1005],b[1005],c[1005]; int main(){ int n; cin>>n; for(int i = 1;i<=n;i++){ cin>>a[i]>>b[i]>>c[i]; } for(int i = 1;i<=n;i++){ int ans1 = 0; int ans2 = 0; int maxh1 = 0; int maxh2 = 0; for(int j = 1;j<=n;j++){ if(a[j]<a[i]){ if(a[j]>maxh1&&b[j]<b[i]&&c[j]>=b[i]) maxh1 = a[j],ans1 = j; if(a[j]>maxh2&&c[j]>c[i]&&b[j]<=c[i]) maxh2 = a[j],ans2 = j; } } cout<<ans1<<" "<<ans2<<endl; } }