import java.util.Scanner;

public class Main{
 public static void main(String[] args) {
   Scanner kbd =new Scanner(System.in);
   long x=kbd.nextLong();
   long a=100;
   int y=0;

   while(x>a){
   a=(long)Math.floor(a*1.01);
   y=y+1;
}
System.out.println(y);
 }
} import java.util.Scanner; Scanner java.util public class Main{
 public static void main(String[] args) {
   Scanner kbd =new Scanner(System.in);
   long x=kbd.nextLong();
   long a=100;
   int y=0;

   while(x>a){
   a=(long)Math.floor(a*1.01);
   y=y+1;
}
System.out.println(y);
 }
} Main public static void main(String[] args) {
   Scanner kbd =new Scanner(System.in);
   long x=kbd.nextLong();
   long a=100;
   int y=0;

   while(x>a){
   a=(long)Math.floor(a*1.01);
   y=y+1;
}
System.out.println(y);
 } main {
   Scanner kbd =new Scanner(System.in);
   long x=kbd.nextLong();
   long a=100;
   int y=0;

   while(x>a){
   a=(long)Math.floor(a*1.01);
   y=y+1;
}
System.out.println(y);
 } Scanner kbd =new Scanner(System.in); kbd new Scanner(System.in) long x=kbd.nextLong(); x kbd.nextLong() kbd.nextLong kbd long a=100; a 100 int y=0; y 0 while(x>a){
   a=(long)Math.floor(a*1.01);
   y=y+1;
} x>a x a {
   a=(long)Math.floor(a*1.01);
   y=y+1;
} a=(long)Math.floor(a*1.01) a (long)Math.floor(a*1.01) Math.floor Math a*1.01 a 1.01 y=y+1 y y+1 y 1 System.out.println(y) System.out.println System.out System System.out y String[] args args public class Main{
 public static void main(String[] args) {
   Scanner kbd =new Scanner(System.in);
   long x=kbd.nextLong();
   long a=100;
   int y=0;

   while(x>a){
   a=(long)Math.floor(a*1.01);
   y=y+1;
}
System.out.println(y);
 }
} public class Main{
 public static void main(String[] args) {
   Scanner kbd =new Scanner(System.in);
   long x=kbd.nextLong();
   long a=100;
   int y=0;

   while(x>a){
   a=(long)Math.floor(a*1.01);
   y=y+1;
}
System.out.println(y);
 }
} Main
import java.util.Scanner;

public class Main{
 public static void main(String[] args) {
   Scanner kbd =new Scanner(System.in);
   long x=kbd.nextLong();
   long a=100;
   int y=0;

   while(x>a){
   a=(long)Math.floor(a*1.01);
   y=y+1;
}
System.out.println(y);
 }
}
