title: Count Fibonacci Numbers Given Range Log Time
signature: pub fn count_fibonacci_numbers_given_range_log_time(low: i32, high: i32) -> i32 {
test_code: use std::collections::HashMap;
  use std::collections::HashSet;
  use std::cmp::*;
  use std::collections::*;
  use std::fmt::*; 
  
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  pub fn validate_solution(actual: i32, expected: i32)->bool{
  return actual==expected
  }
  pub fn driver(low: i32, high: i32, expected: i32)->String{
      if validate_solution(PLACEHOLDER_FN_NAME(low, high), expected) {
        return "PASSED".to_string();
      };
      return "FAILED".to_string();
  
  }
  
  fn main() {
      println!("TEST-0...{}", driver(
        76, 43, 
        0
      ));
      
      println!("TEST-1...{}", driver(
        96, 52, 
        0
      ));
      
      println!("TEST-2...{}", driver(
        19, 79, 
        3
      ));
      
      println!("TEST-3...{}", driver(
        36, 2, 
        0
      ));
      
      println!("TEST-4...{}", driver(
        60, 11, 
        0
      ));
      
      println!("TEST-5...{}", driver(
        20, 15, 
        0
      ));
      
      println!("TEST-6...{}", driver(
        76, 4, 
        0
      ));
      
      println!("TEST-7...{}", driver(
        63, 93, 
        1
      ));
      
      println!("TEST-8...{}", driver(
        2, 25, 
        6
      ));
      
      println!("TEST-9...{}", driver(
        41, 39, 
        0
      ));
      
  }
source_py: def count_fibonacci_numbers_given_range_log_time(low, high):
      (f1, f2, f3) = (0, 1, 1)
      result = 0
      while (f1 <= high):
          if (f1 >= low):
              result += 1
          f1 = f2
          f2 = f3
          f3 = (f1 + f2)
      return result
source_cpp: int count_fibonacci_numbers_given_range_log_time(int low, int high) {
    int f1 = 0, f2 = 1, f3 = 1;
    int result = 0;
    while ( f1 <= high ) {
      if ( f1 >= low ) result ++;
      f1 = f2;
      f2 = f3;
      f3 = f1 + f2;
    }
    return result;
  }