java 代码

import java.io.BufferedInputStream;
import java.util.Scanner;

/**
 * 判断子序列
 */
public class Main {
    private static final int N = 100010;
    private static int[] a = new int[N];
    private static int[] b = new int[N];

    public static void main(String[] args) {
        Scanner sc = new Scanner(new BufferedInputStream(System.in));
        int n = sc.nextInt();
        int m  = sc.nextInt();

        for (int i = 0; i < n; i++)  a[i] = sc.nextInt();
        for (int i = 0; i < m; i++)  b[i] = sc.nextInt();

        int i = 0, j = 0;
        while (i < n && j < m) {
            if (a[i] == b[j]) i++;
            j++;
        }
        if (i == n) System.out.println("Yes");
        else System.out.println("No");
    }
}