import java.util.*;

class tUf {

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

    int n;
    n = sc.nextInt();
    int[] arr = new int[n];
    for (int i = 0; i < n; i++) {
        arr[i] = sc.nextInt();
    }

    //precompute:
    int[] hash = new int[13];
    for (int i = 0; i < n; i++) {
        hash[arr[i]] += 1;
    }

    int q;
    q = sc.nextInt();
    while (q-- != 0) {
        int number;
        number = sc.nextInt();
        // fetching:
        System.out.println(hash[number]);
    }
}

} //Can someone explain the code of fetching

I didn’t understand the purpose of fetching