样例能过，全wa,求大佬帮看下

#include<bits/stdc++.h>
using namespace std;
int search(int arr[], int left, int right, int key) {
    if (left > right)return -1;
    int mid = left + (right - left) / 2;
    if (key >arr[mid]) search(arr, mid + 1, right, key);
    else if (key <arr[mid]) search(arr, left, mid - 1, key);
    else return mid;
}
int main() {
    int n, m, arr[1000010];
    int q;
    int number;
    cin >> n >> m;
    for (int i = 1; i <= n; i++)cin >> arr[i];
    for (int i = 1; i <= m; i++) {
        cin >> q;
        number = search(arr, 0, n, q);
        cout << number << " ";
    }
    return 0;
}