백준 java 10810 1차원배열(공넣기)

https://www.acmicpc.net/problem/10810

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

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

        StringTokenizer st = new StringTokenizer(br.readLine()," ");

        int N = Integer.parseInt(st.nextToken());
        int[] arr = new int[N];
        int M = Integer.parseInt(st.nextToken());

        // i j k
        for(int i=0; i<M;i++){
            st = new StringTokenizer(br.readLine()," ");
            int start = Integer.parseInt(st.nextToken());
            int end = Integer.parseInt(st.nextToken());
            int num = Integer.parseInt(st.nextToken());

            for(int j=start-1; j<end;j++){
                arr[j] = num;
            }
        }
        for(int k=0; k<arr.length;k++){
            bw.write(arr[k]+" ");
        }
        br.close();
        bw.flush();
        bw.close();


    }

### }