#include <bits/stdc++.h>

using namespace std;

#define fst(t) std::get<0>(t)
#define snd(t) std::get<1>(t)
#define thd(t) std::get<2>(t)
#define unless(p) if(!(p))
#define until(p) while(!(p))

using ll = long long;
using P = std::tuple<int,int>;

const int dx[8] = {-1, 1, 0, 0, -1, -1, 1, 1}, dy[8] = {0, 0, -1, 1, -1, 1, -1, 1};

int N;
std::vector<int> A[3];
bool checked[100100];

struct RectangleSet{
    std::map<int, int> rects;

    void add(int x, int y){
        auto it = rects.lower_bound(x);

        if(it != rects.end() && y <= it->second){
            return;
        }

        while(it != rects.begin()){
            auto pr = std::prev(it);

            if(pr->second <= y){
                rects.erase(pr);
            }else{
                break;
            }
        }

        rects[x] = y;
    }

    bool contains(int x, int y){
        auto it = rects.lower_bound(x);

        return it != rects.end() && y <= it->second;
    }
};

void f(int x, int y, int z){
    std::vector<int> indices(N);
    
    std::iota(indices.begin(), indices.end(), 0);
    std::sort(indices.begin(), indices.end(), [&](int i, int j){return A[x][i] < A[x][j];});
    std::reverse(indices.begin(), indices.end());

    RectangleSet rects;
    
    for(int i=0,j=0;i<N;i=j){
        while(j < N && A[x][indices[j]] == A[x][indices[i]]){
            j += 1;
        }
        
        for(int k=i;k<j;++k){
            int t = A[y][indices[k]], u = A[z][indices[k]];

            unless(rects.contains(t, u)){
                continue;
            }

            checked[indices[k]] = 1;
        }

        for(int k=i;k<j;++k){
            int t = A[y][indices[k]], u = A[z][indices[k]];

            rects.add(t, u);
        }
    }
}

int main(){
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    std::cin >> N;

    for(int i=0;i<3;++i){
        A[i].resize(N);
    }

    for(int i=0;i<N;++i){
        std::cin >> A[0][i] >> A[1][i] >> A[2][i];
    }

    f(0, 1, 2);
    f(1, 2, 0);
    f(2, 0, 1);

    for(int i=0;i<N;++i){
        if(!checked[i]){
            std::cout << (i + 1) << std::endl;
        }
    }
}