爆红了，不知道为什么

#include<iostream>
using namespace std;
int main(){
    int n,m;
    cin>>n>>m;
    int ans[n];
    int bns[m];
    for(int i=0;i<n;i++){
        cin>>ans[i];
    }
    int target,left=0,right=n-1,med,b=0,found=0;
    for(int i=0;i<m;i++){
        cin>>target;
        while(left<=right){
            med=(left+right)/2;
            if(target==ans[med]){
                bns[b++]=med;
                found=1;
                break;
            }
            if(target>ans[med]){
                left=med+1;
            }else{
                right=med-1;
            }
        }
        if(!found) bns[b++]=-1;
        left=0;
        right=n-1;
    }
    for(int i=0;i<m;i++){
    cout<<bns[i]<<" ";
    }
    return 0;
}