#include<bits/stdc++.h>
#include<algorithm>
#include<vector>
using namespace std;

typedef long double db;
const int N = 23333333;
const db ans = 11625907.5798, eps = 1e-4;

int main()
{
	ios::sync_with_stdio(0);cin.tie(0);
	
	for(int v = 0;v <= N / 2;++v)
	{
		int u = N - v;
		db res = -1.0 * u * u / N * log2(1.0 * u / N) - 1.0 * v * v / N * log2(1.0 * v / N);
		if(fabs(res - ans) < eps)
		{
			cout<<v<<endl;
			return 0;
		}
	}
	
	return 0;            
}