import java.util.Scanner;
class Main{
 public static void main(String args[]){
   Scanner sc = new Scanner(System.in);
   long x = sc.nextLong();
	long money=100;
   for(int i=1;;i++ ){
     money*=1.01;
     if(money>=x){
       System.out.println(i);
     break;
     }
   }
 }
} import java.util.Scanner; Scanner java.util class Main{
 public static void main(String args[]){
   Scanner sc = new Scanner(System.in);
   long x = sc.nextLong();
	long money=100;
   for(int i=1;;i++ ){
     money*=1.01;
     if(money>=x){
       System.out.println(i);
     break;
     }
   }
 }
} Main public static void main(String args[]){
   Scanner sc = new Scanner(System.in);
   long x = sc.nextLong();
	long money=100;
   for(int i=1;;i++ ){
     money*=1.01;
     if(money>=x){
       System.out.println(i);
     break;
     }
   }
 } main {
   Scanner sc = new Scanner(System.in);
   long x = sc.nextLong();
	long money=100;
   for(int i=1;;i++ ){
     money*=1.01;
     if(money>=x){
       System.out.println(i);
     break;
     }
   }
 } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) long x = sc.nextLong(); x sc.nextLong() sc.nextLong sc long money=100; money 100 for(int i=1;;i++ ){
     money*=1.01;
     if(money>=x){
       System.out.println(i);
     break;
     }
   } int i=1; int i=1; i 1 i++ i++ i {
     money*=1.01;
     if(money>=x){
       System.out.println(i);
     break;
     }
   } {
     money*=1.01;
     if(money>=x){
       System.out.println(i);
     break;
     }
   } money*=1.01 money 1.01 if(money>=x){
       System.out.println(i);
     break;
     } money>=x money x {
       System.out.println(i);
     break;
     } System.out.println(i) System.out.println System.out System System.out i break; String args[] args
import java.util.Scanner;
class Main{
 public static void main(String args[]){
   Scanner sc = new Scanner(System.in);
   long x = sc.nextLong();
	long money=100;
   for(int i=1;;i++ ){
     money*=1.01;
     if(money>=x){
       System.out.println(i);
     break;
     }
   }
 }
}
