백준 10813 JAVA

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;

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

        int n = Integer.parseInt(st.nextToken());
        int m = Integer.parseInt(st.nextToken());

        int[] bucket = new int[n];
        for (int k = 0; k < n; k++) {
            bucket[k] = k+1;
        }
        int temp;

        for (int k = 0; k < m; k++) {
            st = new StringTokenizer(br.readLine(), " ");

            int i = Integer.parseInt(st.nextToken()) - 1;
            int j = Integer.parseInt(st.nextToken()) - 1;

            temp = bucket[i];
            bucket[i] = bucket[j];
            bucket[j] = temp;
        }
        for (int number : bucket) {
            bw.write(number + " ");
        }
        bw.flush();
    }
}