tijie

#include<bits/stdc++.h>
using namespace std;
int main(){
int n,m;cin>>n>>m;
int a[1031029];
for(int i=1;i<=n;i++){
cin>>a[i];
}int c=-1;
int l=1,r=n,mid;
while(l<=r){
mid=(l+r)/2;
if(a[mid]<=m){
c=a[mid];
l=mid+1;
}else{
r=mid-1;
}
}cout<<c<<"\n";
return 0;
}