#include<bits/stdc++.h>
using namespace std;
int i,t;
int main(){
    for(i=100000;i<=999999;i++){
        if((i-7)/10+700000==i*4){
            cout<<i;
            break;
        }
    }
     
return 0;}
/**************************************************************
	Problem: 1013
	User: lzc
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/