#include <iostream>
#include <string>
#include <cmath>
#include <vector>
#include <set>
#include <map>
#include <stack>
#include <queue>

#define ll long long
#define ld long double
#define mp make_pair
#define all(v) (v).begin(), (v).end()

const ll inf = 1073741823, mod = 998244353;

using namespace std;

void run() {
    ll n, m;
    cin >> n >> m;

    vector<ll> v(n, inf);

    while (m--) {
        ll l, r, x;
        cin >> l >> r >> x;
        l--, r--;

        for (ll i = l; i <= r; i++) v[i] &= x;
    }

    for (ll i = 0; i < n; i++)
        cout << v[i] << ' ';
}


int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    ll tt = 1;
    cin >> tt;

    while (tt--) {
        run();
        cout << "\n\n";
    }

    return 0;
}