title: Count Factorial Numbers In A Given Range
signature: function countFactorialNumbersInAGivenRange($low, $high) {
test_code: <?php
  
  
  // SOLUTION CODE 
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function validateSolution($actual, $expected){
      return serialize($actual) == serialize($expected);
  }
  
  function driver($low, $high, $expected){
      try{
        if (validateSolution(PLACEHOLDER_FN_NAME($low, $high), $expected)){
          return "PASSED";
        }
        return "FAILED";
      }
      catch (Exception $exception_obj) {
        return get_class($exception_obj);
      }
  }
  
  function main(){
      printf("TEST-0...%s\n",driver(
        57, 79, 
        0));
      
      printf("TEST-1...%s\n",driver(
        57, 21, 
        0));
      
      printf("TEST-2...%s\n",driver(
        31, 37, 
        0));
      
      printf("TEST-3...%s\n",driver(
        62, 87, 
        0));
      
      printf("TEST-4...%s\n",driver(
        49, 98, 
        0));
      
      printf("TEST-5...%s\n",driver(
        82, 76, 
        0));
      
      printf("TEST-6...%s\n",driver(
        31, 45, 
        0));
      
      printf("TEST-7...%s\n",driver(
        5, 52, 
        2));
      
      printf("TEST-8...%s\n",driver(
        76, 43, 
        0));
      
      printf("TEST-9...%s\n",driver(
        55, 6, 
        0));
      
  }
  
  main();
  ?>
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;
  }