import java.util.Scanner;

import static java.lang.Math.pow;

public class Main { public static void main(String[] args) { //输入k Scanner sc = new Scanner(System.in); int k = sc.nextInt();

    //定义Sn
    double Sn = 0;
    int i = 1, count = 0;
    while (Sn <= k) {
        Sn = Sn + pow(i, -1 );
        i++;
        count++;
    }

    System.out.println(count);
}

}

#include<bits/stdc++.h>
using namespace std;
int main(){
    int k,n=0;
    cin>>k;
    for(double Sn=0;Sn<=k;n++,Sn+=1.0/n);
    cout<<n;
    return 0;
}

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

int main() {
    int k; double sn = 0;
    cin >> k;
    for (int n = 1;; n++) {
        sn += 1.0 / n;
        if (sn > k) {
            cout << n;
            break;
        }
    }
    return 0;
}

#include <stdio.h>
int main()
{
    int k;
    scanf("%d",&k);
    double sum=0;
    int count=0;
    for(int i=1;sum<=k;i++){
        sum+=1.0/i;
        count++;
    }
    printf("%d",count);
    return 0;
}