#include <stdio.h>
int main(void){

  int N,i=0;
  int cookies=1;

  do{
    scanf("%d",&N);
  }while(N<1||N>100000000);

  while(1){
    cookies*=2;
    if(cookies<N){
      i++;
    }
    else{
      break;
    }
  }

  printf("%d\n",i+1);

return 0;
}