import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        long k = Long.parseLong(br.readLine());
        int result = 0;
        double money = 100;
        while (money < k) {
            money = Math.floor(money * 1.01);
            result++;
        }
        System.out.println(result);
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        long k = Long.parseLong(br.readLine());
        int result = 0;
        double money = 100;
        while (money < k) {
            money = Math.floor(money * 1.01);
            result++;
        }
        System.out.println(result);
    }
} Main public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        long k = Long.parseLong(br.readLine());
        int result = 0;
        double money = 100;
        while (money < k) {
            money = Math.floor(money * 1.01);
            result++;
        }
        System.out.println(result);
    } main {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        long k = Long.parseLong(br.readLine());
        int result = 0;
        double money = 100;
        while (money < k) {
            money = Math.floor(money * 1.01);
            result++;
        }
        System.out.println(result);
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) long k = Long.parseLong(br.readLine()); k Long.parseLong(br.readLine()) Long.parseLong Long br.readLine() br.readLine br int result = 0; result 0 double money = 100; money 100 while (money < k) {
            money = Math.floor(money * 1.01);
            result++;
        } money < k money k {
            money = Math.floor(money * 1.01);
            result++;
        } money = Math.floor(money * 1.01) money Math.floor(money * 1.01) Math.floor Math money * 1.01 money 1.01 result++ result System.out.println(result) System.out.println System.out System System.out result String[] args args public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        long k = Long.parseLong(br.readLine());
        int result = 0;
        double money = 100;
        while (money < k) {
            money = Math.floor(money * 1.01);
            result++;
        }
        System.out.println(result);
    }
} public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        long k = Long.parseLong(br.readLine());
        int result = 0;
        double money = 100;
        while (money < k) {
            money = Math.floor(money * 1.01);
            result++;
        }
        System.out.println(result);
    }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        long k = Long.parseLong(br.readLine());
        int result = 0;
        double money = 100;
        while (money < k) {
            money = Math.floor(money * 1.01);
            result++;
        }
        System.out.println(result);
    }
}
