#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;

int main(){
    int N;
    cin >> N;
    vector<vector<short>> space(10002, vector<short>(10002, -1));
    vector<vector<short>> space_max(10002, vector<short>(10002, -1));
    short P[N], T[N], R[N];
    for(int i = 0; i < N; i++){
        cin >> P[i] >> T[i] >> R[i];
        space[P[i]][T[i]] = max(space[P[i]][T[i]], R[i]);
    }
    for(int i = 10000; i >= 0; i--){
        for(int j = 10000; j >= 0; j--){
            space_max[i][j] = max({space_max[i + 1][j], space_max[i][j + 1], space[i][j]});
        }
    }
    for(int i = 0; i < N; i++){
        if(space[P[i]][T[i]] == R[i] && max(space_max[P[i] + 1][T[i]], space_max[P[i]][T[i] + 1]) < R[i]){
            cout << i + 1 << endl;
        }
    }
}