#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,n;
    cin>>n;
    a=n%1000;
    b=n/1000;
    if(a>=b){
    	cout<<a*1000+b;
    }if(a<b){
    	cout<<n;
    }
}
/**************************************************************
	Problem: 1631
	User: sucongyi
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/