#include <bits/stdc++.h>
//#define _FORTIFY_SOURCE 0
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("no-stack-protector")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define ull unsigned long long
#define pii pair<ll, ll>
#define mp make_pair
#define ll long long
#define ld long double
#define pb push_back
#define deb(x) cout << #x << " = " << x << endl
#define all(x) x.begin(), x.end()
#define vi vector<ll>
const ll mod = (ll)1e9 + 7;
const ll inf = (ll)1e18;
const long double e = 2.718281828459;
const long double pi = atan2l(0, -1);
using namespace std;
template <class T>
istream& operator>>(istream &in, vector<T> &arr) {
for (T &cnt : arr) {
in >> cnt;
}
return in;
};
struct stree {
vector<ll> t, upd;
stree(ll n) {
t.resize(4 * n, -inf);
upd.resize(4 * n, -inf);
}
void push(ll v, ll d) {
if (upd[v] == -inf) {
return;
}
t[v] = upd[v];
if (d != 0) {
upd[v * 2] = upd[v];
upd[v * 2 + 1] = upd[v];
}
upd[v] = -inf;
}
void update(ll v, ll l, ll r, ll ql, ll qr, ll val) {
push(v, r - l);
if (ql <= l and r <= qr) {
upd[v] = val;
push(v, r - l);
return;
}
if (ql > r or qr < l) {
return;
}
ll mid = (l + r) / 2;
update(v * 2, l, mid, ql, qr, val);
update(v * 2 + 1, mid + 1, r, ql, qr, val);
}
ll get(ll v, ll l, ll r, ll pos) {
push(v, r - l);
if (l == r) {
return t[v];
}
ll mid = (l + r) / 2;
if (pos <= mid) {
return get(v * 2, l, mid, pos);
} else {
return get(v * 2 + 1, mid + 1, r, pos);
}
}
};
void solve() {
ll n, m;
cin >> n >> m;
stree t(n);
vector<pair<ll, pair<ll, ll>>> q;
for (int i = 0; i < m; i++) {
ll l, r, x;
cin >> l >> r >> x;
l--;
r--;
x -= l;
q.pb({x, {l, r}});
}
sort(all(q));
for (int i = 0; i < m; i++) {
t.update(1, 0, n - 1, q[i].second.first, q[i].second.second, q[i].first);
}
for (int i = 0; i < n; i++) {
ll val = t.get(1, 0, n - 1, i);
if (val == -inf) {
cout << "0 ";
} else {
cout << i + val << " ";
}
}
}
int main() {
#ifndef LOCAL
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
#else
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
cout.precision(30);
srand(time(0));
cout.setf(ios::fixed);
solve();
return 0;
}
