#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) begin(v),end(v)
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
using ll = long long;
using pii = pair<int, int>;
constexpr ll INF = 1ll<<30;
constexpr ll longINF = 1ll<<60;
constexpr ll MOD = 1000000007;
constexpr bool debug = false;
//---------------------------------//

int main() {
	int x;
	cin >> x;
	if (x >= 50) { puts("0"); return 0; }
	if (x == 2) { puts("1000000"); return 0; }
	double ans = 0;
	const double pi = acos(-1.0);
	FOR(i, x, 51) FOR(j, 2, 10000) ans += 1 / pow(j, i);
	ans *= 1000000;
	printf("%d\n", (int)floor(ans));
}