import java.util.*;

public class Main {
    public static void main (String[] args) {
        Scanner s = new Scanner(System.in);
          double x = Double.parseDouble(s.next());
          double money = 100;
          int count = 0;
      	while(x > money) {
          money *= 1.01;
          money = Math.floor(money);
          count++;
        }

      	System.out.println(count);
    }
} import java.util.*; util.* java public class Main {
    public static void main (String[] args) {
        Scanner s = new Scanner(System.in);
          double x = Double.parseDouble(s.next());
          double money = 100;
          int count = 0;
      	while(x > money) {
          money *= 1.01;
          money = Math.floor(money);
          count++;
        }

      	System.out.println(count);
    }
} Main public static void main (String[] args) {
        Scanner s = new Scanner(System.in);
          double x = Double.parseDouble(s.next());
          double money = 100;
          int count = 0;
      	while(x > money) {
          money *= 1.01;
          money = Math.floor(money);
          count++;
        }

      	System.out.println(count);
    } main {
        Scanner s = new Scanner(System.in);
          double x = Double.parseDouble(s.next());
          double money = 100;
          int count = 0;
      	while(x > money) {
          money *= 1.01;
          money = Math.floor(money);
          count++;
        }

      	System.out.println(count);
    } Scanner s = new Scanner(System.in); s new Scanner(System.in) double x = Double.parseDouble(s.next()); x Double.parseDouble(s.next()) Double.parseDouble Double s.next() s.next s double money = 100; money 100 int count = 0; count 0 while(x > money) {
          money *= 1.01;
          money = Math.floor(money);
          count++;
        } x > money x money {
          money *= 1.01;
          money = Math.floor(money);
          count++;
        } money *= 1.01 money 1.01 money = Math.floor(money) money Math.floor(money) Math.floor Math money count++ count System.out.println(count) System.out.println System.out System System.out count String[] args args public class Main {
    public static void main (String[] args) {
        Scanner s = new Scanner(System.in);
          double x = Double.parseDouble(s.next());
          double money = 100;
          int count = 0;
      	while(x > money) {
          money *= 1.01;
          money = Math.floor(money);
          count++;
        }

      	System.out.println(count);
    }
} public class Main {
    public static void main (String[] args) {
        Scanner s = new Scanner(System.in);
          double x = Double.parseDouble(s.next());
          double money = 100;
          int count = 0;
      	while(x > money) {
          money *= 1.01;
          money = Math.floor(money);
          count++;
        }

      	System.out.println(count);
    }
} Main
import java.util.*;

public class Main {
    public static void main (String[] args) {
        Scanner s = new Scanner(System.in);
          double x = Double.parseDouble(s.next());
          double money = 100;
          int count = 0;
      	while(x > money) {
          money *= 1.01;
          money = Math.floor(money);
          count++;
        }

      	System.out.println(count);
    }
}