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#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cstring>
#include <cassert>
#if __cplusplus > 201103L
#include <initializer_list>
#include <unordered_map>
#include <unordered_set>
#endif
using namespace std;
#ifndef ONLINE_JUDGE
#define DEBUG
#endif
#define inf 0x3F3F3F3F
#define fst first
#define snd second
#define PB push_back
#define SZ(x) (int)((x).size())
#define ALL(x) (x).begin(), (x).end()
#define FOR(i, a, b) for (int _end_ = (b), i = (a); i <= _end_; ++i)
#define ROF(i, a, b) for (int _end_ = (b), i = (a); i >= _end_; --i)
typedef unsigned int uint;
typedef long long int64;
typedef unsigned long long uint64;
typedef long double real;
int64 fpm(int64 b, int64 e, int64 m) { int64 t = 1; for (; e; e >>= 1, b = b * b % m) e & 1 ? t = t * b % m : 0; return t; }
template<class T> inline bool chkmin(T &a, T b) {return a > b ? a = b, true : false;}
template<class T> inline bool chkmax(T &a, T b) {return a < b ? a = b, true : false;}
template<class T> inline T sqr(T x) {return x * x;}
template <typename T> T gcd(T x, T y) {for (T t; x; ) t = x, x = y % x, y = t; return y; }
template<class edge> struct Graph {
vector<vector<edge> > adj;
Graph(int n) {adj.clear(); adj.resize(n + 5);}
Graph() {adj.clear(); }
void resize(int n) {adj.resize(n + 5); }
void add(int s, edge e){adj[s].push_back(e);}
void del(int s, edge e) {adj[s].erase(find(iter(adj[s]), e)); }
vector<edge>& operator [](int t) {return adj[t];}
};
const int n = 1e9;
int64 f[110];
int64 g[110];
int main(int argc, char **argv) {
ios_base::sync_with_stdio(false);
f[1] = 0;
for (int i = 2; i <= 100; ++i) {
f[i] = inf;
for (int j = 1; j < i; ++j)
chkmin(f[i], f[j] + f[i - j] + i + 3 * j);
cout << i << " " << f[i] << endl;
}
g[0] = 1;
for (int i = 1; i <= 100; ++i) {
g[i] = g[i - 1];
if (i >= 4) g[i] += g[i - 4];
// cout << i << " " << f[i] << endl;
}
int64 x = 1, y = 0;
for (int i = 0; i <= 100; ++i) {
int z = x + g[i];
if (x < n && n <= z) {
cout << y + (5 + i) * (n - x) << endl;
break;
}
y += (5 + i) * g[i];
x = z;
}
return 0;
}
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