import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long X = Long.parseLong(sc.next());
        double money = 100.0;
        double rate = 1.01;

        int count = 0;
        while(money <= X) {
            // 小数点以下切り捨て
            money = Math.floor(money);
            money = money * rate;
            count++;
        }
        System.out.println(count);
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long X = Long.parseLong(sc.next());
        double money = 100.0;
        double rate = 1.01;

        int count = 0;
        while(money <= X) {
            // 小数点以下切り捨て
            money = Math.floor(money);
            money = money * rate;
            count++;
        }
        System.out.println(count);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long X = Long.parseLong(sc.next());
        double money = 100.0;
        double rate = 1.01;

        int count = 0;
        while(money <= X) {
            // 小数点以下切り捨て
            money = Math.floor(money);
            money = money * rate;
            count++;
        }
        System.out.println(count);
    } main {
        Scanner sc = new Scanner(System.in);
        long X = Long.parseLong(sc.next());
        double money = 100.0;
        double rate = 1.01;

        int count = 0;
        while(money <= X) {
            // 小数点以下切り捨て
            money = Math.floor(money);
            money = money * rate;
            count++;
        }
        System.out.println(count);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) long X = Long.parseLong(sc.next()); X Long.parseLong(sc.next()) Long.parseLong Long sc.next() sc.next sc double money = 100.0; money 100.0 double rate = 1.01; rate 1.01 int count = 0; count 0 while(money <= X) {
            // 小数点以下切り捨て
            money = Math.floor(money);
            money = money * rate;
            count++;
        } money <= X money X {
            // 小数点以下切り捨て
            money = Math.floor(money);
            money = money * rate;
            count++;
        } money = Math.floor(money) money Math.floor(money) Math.floor Math money money = money * rate money money * rate money rate 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 sc = new Scanner(System.in);
        long X = Long.parseLong(sc.next());
        double money = 100.0;
        double rate = 1.01;

        int count = 0;
        while(money <= X) {
            // 小数点以下切り捨て
            money = Math.floor(money);
            money = money * rate;
            count++;
        }
        System.out.println(count);
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long X = Long.parseLong(sc.next());
        double money = 100.0;
        double rate = 1.01;

        int count = 0;
        while(money <= X) {
            // 小数点以下切り捨て
            money = Math.floor(money);
            money = money * rate;
            count++;
        }
        System.out.println(count);
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long X = Long.parseLong(sc.next());
        double money = 100.0;
        double rate = 1.01;

        int count = 0;
        while(money <= X) {
            // 小数点以下切り捨て
            money = Math.floor(money);
            money = money * rate;
            count++;
        }
        System.out.println(count);
    }
}