import java.math.BigDecimal;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        BigDecimal X = in.nextBigDecimal();
        BigDecimal yen = new BigDecimal("100");
        BigDecimal rate = new BigDecimal("1.01");
        int count = 0;
        while (yen.compareTo(X)<0){
            yen = new BigDecimal(yen.multiply(rate).toString().split("\\.")[0]);
            count++;
        }
        System.out.print(count);
    }
} import java.math.BigDecimal; BigDecimal java.math import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        BigDecimal X = in.nextBigDecimal();
        BigDecimal yen = new BigDecimal("100");
        BigDecimal rate = new BigDecimal("1.01");
        int count = 0;
        while (yen.compareTo(X)<0){
            yen = new BigDecimal(yen.multiply(rate).toString().split("\\.")[0]);
            count++;
        }
        System.out.print(count);
    }
} Main public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        BigDecimal X = in.nextBigDecimal();
        BigDecimal yen = new BigDecimal("100");
        BigDecimal rate = new BigDecimal("1.01");
        int count = 0;
        while (yen.compareTo(X)<0){
            yen = new BigDecimal(yen.multiply(rate).toString().split("\\.")[0]);
            count++;
        }
        System.out.print(count);
    } main {
        Scanner in = new Scanner(System.in);
        BigDecimal X = in.nextBigDecimal();
        BigDecimal yen = new BigDecimal("100");
        BigDecimal rate = new BigDecimal("1.01");
        int count = 0;
        while (yen.compareTo(X)<0){
            yen = new BigDecimal(yen.multiply(rate).toString().split("\\.")[0]);
            count++;
        }
        System.out.print(count);
    } Scanner in = new Scanner(System.in); in new Scanner(System.in) BigDecimal X = in.nextBigDecimal(); X in.nextBigDecimal() in.nextBigDecimal in BigDecimal yen = new BigDecimal("100"); yen new BigDecimal("100") BigDecimal rate = new BigDecimal("1.01"); rate new BigDecimal("1.01") int count = 0; count 0 while (yen.compareTo(X)<0){
            yen = new BigDecimal(yen.multiply(rate).toString().split("\\.")[0]);
            count++;
        } yen.compareTo(X)<0 yen.compareTo(X) yen.compareTo yen X 0 {
            yen = new BigDecimal(yen.multiply(rate).toString().split("\\.")[0]);
            count++;
        } yen = new BigDecimal(yen.multiply(rate).toString().split("\\.")[0]) yen new BigDecimal(yen.multiply(rate).toString().split("\\.")[0]) count++ count System.out.print(count) System.out.print System.out System System.out count String[] args args public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        BigDecimal X = in.nextBigDecimal();
        BigDecimal yen = new BigDecimal("100");
        BigDecimal rate = new BigDecimal("1.01");
        int count = 0;
        while (yen.compareTo(X)<0){
            yen = new BigDecimal(yen.multiply(rate).toString().split("\\.")[0]);
            count++;
        }
        System.out.print(count);
    }
} public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        BigDecimal X = in.nextBigDecimal();
        BigDecimal yen = new BigDecimal("100");
        BigDecimal rate = new BigDecimal("1.01");
        int count = 0;
        while (yen.compareTo(X)<0){
            yen = new BigDecimal(yen.multiply(rate).toString().split("\\.")[0]);
            count++;
        }
        System.out.print(count);
    }
} Main
import java.math.BigDecimal;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        BigDecimal X = in.nextBigDecimal();
        BigDecimal yen = new BigDecimal("100");
        BigDecimal rate = new BigDecimal("1.01");
        int count = 0;
        while (yen.compareTo(X)<0){
            yen = new BigDecimal(yen.multiply(rate).toString().split("\\.")[0]);
            count++;
        }
        System.out.print(count);
    }
}