#include <bits/stdc++.h>
using namespace std;
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n, m;
cin >> n >> m;
vector<vector<long long>> adds(n+2), removes(n+2);
for(int i = 0; i < m; i++){
long long l, r, x;
cin >> l >> r >> x;
long long C = x - l;
adds[l].push_back(C);
removes[r+1].push_back(C);
}
multiset<long long> active;
vector<long long> ans(n+1, 0);
for(int j = 1; j <= n; j++){
for(auto C : adds[j])
active.insert(C);
for(auto C : removes[j]){
auto it = active.find(C);
if (it != active.end())
active.erase(it);
}
if (!active.empty())
ans[j] = j + *prev(active.end());
}
for(int j = 1; j <= n; j++){
cout << ans[j] << (j == n ? '\n' : ' ');
}
}
