백준 10813번 자바 - 공 바꾸기

import java.util.Scanner;

public class Main {
    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);

        int N = scanner.nextInt();
        int M = scanner.nextInt();

        int[] arr = new int[N];
        int temp;

        for (int i = 0; i < N; i++) {
            arr[i] = i + 1;
        }
        for (int j = 0; j < M; j++) {
            int I = scanner.nextInt();
            int J = scanner.nextInt();

            temp = arr[I-1];
            arr[I-1] = arr[J-1];
            arr[J-1] = temp;
        }
        for(int k = 0; k <arr.length; k++) {
            System.out.print(arr[k] + " ");
        }
    }
}