求改

#include<bits/stdc++.h>
using namespace std;
int s[1000005];
int n=0,m=0,q=0,mid=0,l=0,r=0,cun=-1,t=0;
int main()
{
    cin>>n>>m;
    for(int i=0;i<n;i++)
    {
        cin>>s[i];
    }
    for(int j=0;j<m;j++)
    {
        cin>>q;
        l=1;
        r=n;
        cun=-1;
        while(l<=r)
        {
            mid=(l+r)/2;
            if(s[mid]>q)
            {
                r=mid-1;
                cun=mid;
            }
            else
            {
                l=mid+1;
            }
        }
        if(cun==-1)
        {
            cout<<-1<<" ";
            continue;
        }
        if(s[cun]!=t)
        {
            cout<<-1<<" ";
            continue;
        }
        else
        {
            cout<<cun<<" ";
        }
    }
    return 0;
}