/*input
6 4
4 4 3
1 2 5
5 6 1
6 6 1
*/
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define int long long
#define double long double
#define f first
#define s second
#define mp make_pair
#define pb push_back
#define RE(i,n) for (int i = 1; i <= n; i++)
#define RED(i,n) for (int i = n; i > 0; i--)
#define REPS(i,n) for(int i = 1; (i*i) <= n; i++)
#define REP(i,n) for (int i = 0; i < (int)n; i++)
#define FOR(i,a,b) for (int i = a; i < b; i++)
#define REPD(i,n) for (int i = n-1; i >= 0; i--)
#define FORD(i,a,b) for (int i = a; i >= b; i--)
#define all(v) v.begin(),v.end()
#define pii pair<int,int>
#define vi vector<int>
#define vvi vector<vi>
#define print(arr) for (auto it = arr.begin(); it != arr.end(); ++it) cout << *it << " "; cout << endl;
#define debug(x) cout << x << endl;
#define debug2(x,y) cout << x << " " << y << endl;
#define debug3(x,y,z) cout << x << " " << y << " " << z << endl;
typedef tree<
int,
null_type,
less<int>,
rb_tree_tag,
tree_order_statistics_node_update>
ordered_set;
const int INF = 1e18+1;
const int MOD = 1e9+7;
const double PI = 3.14159265358979323846264338;
int raise(int a,int n,int m = MOD){
if(n == 0)return 1;
if(n == 1)return a;
int x = 1;
x *= raise(a,n/2,m);
x %= m;
x *= x;
x %= m;
if(n%2)x*= a;
x %= m;
return x;
}
int floor1(int n,int k){
if(n%k == 0 || n >= 0)return n/k;
return (n/k)-1;
}
int ceil1(int n,int k){
return floor1(n+k-1,k);
}
const int N = 3e5+1;
int n,q;
int lazy[4*N];
#define child 2*node
#define mid (l+r)/2
void pushdown(int node,int l,int r){
if(l == r)return;
lazy[child] = max(lazy[child],lazy[node]);
lazy[child+1] = max(lazy[child+1],lazy[node]);
}
void upd(int node,int l,int r,int start,int end,int val){
pushdown(node,l,r);
if(l > end or start > r)return;
if(start <= l and r <= end){
lazy[node] = max(lazy[node],val);
pushdown(node,l,r);
return;
}
upd(child,l,mid,start,end,val);
upd(child+1,mid+1,r,start,end,val);
}
int getval(int node,int l,int r,int ind){
pushdown(node,l,r);
if(l == r)return lazy[node];
if(ind <= mid)return getval(child,l,mid,ind);
return getval(child+1,mid+1,r,ind);
}
void solve(){
cin >> n >> q;
RE(i,4*n)lazy[i] = -INF;
RE(i,q){
int l,r,x;cin >> l >> r >> x;
upd(1,1,n,l,r,x-l);
}
RE(i,n){
int ans = getval(1,1,n,i)+i;
if(ans < 0)ans = 0;
cout << ans << " ";
}
}
signed main(){
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
//freopen(".in","r",stdin);freopen(".out","w",stdout);
int t = 1;
//cin >> t;
while(t--){
solve();
}
return 0;
}
