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

int num[1000000];
int answer[100000];
int n;

int find(int input)
{
    int head = 0;
    int tail = n-1;
    while (head <= tail)
    {
        int mid = (head + tail+1) / 2;
        if (input == num[mid]&& num[mid-1]<num[mid])
        {
            return mid+1;
        }
        else if (input > num[mid])
        {
            head = mid + 1;
        }
        else
        {
            tail = mid - 1;
        }
    }
    return -1;
}

int main()
{
    int m;
    cin >> n >> m;
    for (int i = 0; i < n; i++)
    {
        cin >> num[i];
    }

    for (int i = 0; i < m; i++)
    {
        int l;
        cin>>l;
        answer[i] = find(l);
    }

    for (int i = 0; i < m; i++)
    {
        cout << answer[i] << ' ';
    }
    return 0;
}

孩子好不容易写明白二分，然后第一个点就wa了，还下不来输入输出，所以麻烦大佬帮忙看看我呜呜