#include <cstdio>
#include <cstdlib>
#include <cstdarg>
#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define xx first
#define yy second
#define pll pair<long long, long long>
#define MOD 1000000007
typedef long long ll;
using namespace std;
mt19937 mt(time(nullptr));
int use_machine(vector<int> x);
int solve(int l, int r) {
if(l==r) return 1;
int m=(l+r)/2;
int left=solve(l, m);
int right=solve(m+1, r);
vector<int> v;
v.pb(l);
v.pb(m+1);
if(use_machine(v)) {
return left+(r-m)-right;
}
else {
return left+right;
}
}
int count_mushrooms(int N) {
return solve(0, N-1);
}
