Go

package main

import (
    "bufio"
    "fmt"
    "os"
)

func isSubsequence(a, b []int) bool {
    var i, j int
    for i < len(a) && j < len(b) {
        if a[i] == b[j] {
            i++
        }
        j++
    }

    return i == len(a)
}

func main() {
    in := bufio.NewReader(os.Stdin)
    var n, m int
    fmt.Fscan(in, &n, &m)

    a, b := make([]int, n), make([]int, m)
    for i := 0; i < n; i++ {
        fmt.Fscan(in, &a[i])
    }
    for i := 0; i < m; i++ {
        fmt.Fscan(in, &b[i])
    }

    if isSubsequence(a, b) {
        fmt.Println("Yes")
    } else {
        fmt.Println("No")
    }
}

C++

#include <iostream>
#include <vector>
using namespace std;

bool isSubsequence(const vector<int>& a, const vector<int>& b) {
    size_t i = 0, j = 0;
    while (i < a.size() && j < b.size()) {
        if (a[i] == b[j]) {
            i++;
        }
        j++;
    }

    return i == a.size();
}

int main() {
    int n, m;
    scanf("%d %d", &n, &m);

    vector<int> a(n), b(m);
    for (int i = 0; i < n; ++i) {
        scanf("%d", &a[i]);
    }
    for (int i = 0; i < m; ++i) {
        scanf("%d", &b[i]);
    }

    if (isSubsequence(a, b)) {
        puts("Yes");
    } else {
        puts("No");
    }

    return 0;
}