有没有大佬告诉我怎么出错了qwq看了好久没看出来```cpp
#include
#include
using namespace std;
long long a[1000001];
long long b[1000001];
int main()
{
long long n;
cin>>n;
long long m;
cin>>m;
for(long long i=0;i<n;i++)
cin>>a[i];
for(long long i=0;i<m;i++)
cin>>b[i];
int i=0;
while(m--)
{
long long r=n-1;
long long l=0;
int mid=(r+l)/2;
while(1)
{
if(b[i]==a[mid])
{
if(b[i]!=a[mid-1])
{
cout<<mid+1<<" ";
break;
}
else
mid--;
}
if(b[i]<a[mid])
{
if(r!=mid)
{
r=mid;
mid=(r+l)/2;
}
else
{
cout<<-1<<" ";
break;
}
}
if(b[i]>a[mid])
{
if(l!=mid)
{
l=mid+1;
mid=(r+l)/2;
}
else
{
cout<<-1<<" ";
break;
}
}
}
i++;
}
}
