title: Count Factorial Numbers In A Given Range
signature: func countFactorialNumbersInAGivenRange(low int, high int) int {
test_code: package main
  
  import (
      "fmt"
      "reflect"
      "math"
      "sort"
  )
  
  // SOLUTION CODE
  // ===================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE
  // ===================================
  func validateSolution(actual int, expected int) bool {
      return reflect.DeepEqual(actual,expected)
  }
  
  func driver(low int, high int, expected int) string {
      if validateSolution(PLACEHOLDER_FN_NAME(low, high),expected) {
              return "PASSED"
      }
      return "FAILED"
  
  }
  
  func main() {
  
      // Use imports to avoid undefined errors
      var _ = reflect.DeepEqual
      _ = math.Abs
      _ = sort.Sort
      result := ""
      result = driver(57, 
  	79, 0)
      fmt.Printf("TEST-0...%s\n", result)
      
      result = driver(57, 
  	21, 0)
      fmt.Printf("TEST-1...%s\n", result)
      
      result = driver(31, 
  	37, 0)
      fmt.Printf("TEST-2...%s\n", result)
      
      result = driver(62, 
  	87, 0)
      fmt.Printf("TEST-3...%s\n", result)
      
      result = driver(49, 
  	98, 0)
      fmt.Printf("TEST-4...%s\n", result)
      
      result = driver(82, 
  	76, 0)
      fmt.Printf("TEST-5...%s\n", result)
      
      result = driver(31, 
  	45, 0)
      fmt.Printf("TEST-6...%s\n", result)
      
      result = driver(5, 
  	52, 2)
      fmt.Printf("TEST-7...%s\n", result)
      
      result = driver(76, 
  	43, 0)
      fmt.Printf("TEST-8...%s\n", result)
      
      result = driver(55, 
  	6, 0)
      fmt.Printf("TEST-9...%s\n", result)
      
          
  }
source_py: def count_factorial_numbers_in_a_given_range(low, high):
      fact = 1
      x = 1
      while (fact < low):
          fact = (fact * x)
          x += 1
      res = 0
      while (fact <= high):
          res += 1
          fact = (fact * x)
          x += 1
      return res
source_cpp: int count_factorial_numbers_in_a_given_range(int low, int high) {
    int fact = 1, x = 1;
    while ( fact < low ) {
      fact = fact * x;
      x ++;
    }
    int res = 0;
    while ( fact <= high ) {
      res ++;
      fact = fact * x;
      x ++;
    }
    return res;
  }