我的代码：

#include <bits/stdc++.h>
#define ll long long
using namespace std;
ll n,m,a[100005];
int find(int x){
	int left = 1,right = n;
	int middle = (left + right) / 2;
	while(left < right){
		if(a[middle] == x) return middle;
		else if(x < a[middle]) middle = right;
		else middle = left + 1;
	} 
	return -1;
}
int main(){
	cin >> n >> m;
	for(int i = 1;i <= n;i ++){
		cin >> a[i]; 
	}
	for(int i = 1;i <= m;i ++){
		int x;
		cin >> x;
		cout << find(x) << " ";
	}
	return 0;
}

没有输出，求助