#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: fzy001
	Language: C++
	Result: Accepted
	Time:3 ms
	Memory:2072 kb
****************************************************************/