10810.java

import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int N=Integer.parseInt(st.nextToken());
        int M=Integer.parseInt(st.nextToken());
        int[] num = new int[N+1];
        for(int x=0;x<M;x++){
            st = new StringTokenizer(br.readLine());
            int i = Integer.parseInt(st.nextToken());
            int j = Integer.parseInt(st.nextToken());
            int k = Integer.parseInt(st.nextToken());
            for(int y=i;y<=j;y++){
                num[y]=k;
            }
        }
        for(int i=1;i<=N;i++){
            System.out.print(num[i] + " ");
        }
        br.close();
    }
}