title: Count Trailing Zeroes Factorial Number
signature: class Solution {
  
      public Integer countTrailingZeroesFactorialNumber(Integer n) {
test_code: import static java.util.Map.entry;  
  import java.util.*;
  import java.lang.*;
  // TESTING CODE 
  // ============================================
  class QuestionEvaluator {
      public static String validateSolution(Integer n, Integer expected){
          try{
              Driver driver = new Driver();
              if (driver.run(n,expected)){
                  return "PASSED";
              }
              return "FAILED";
              
          } catch (Exception exception_obj){
              return exception_obj.getClass().getSimpleName();
          }
  
      }
      public static void main(String[] args) {
          String result;
          result = validateSolution(9, 1);
          System.out.println(String.format("%s%s","TEST-0...",result));    
      
          result = validateSolution(43, 9);
          System.out.println(String.format("%s%s","TEST-1...",result));    
      
          result = validateSolution(50, 12);
          System.out.println(String.format("%s%s","TEST-2...",result));    
      
          result = validateSolution(32, 7);
          System.out.println(String.format("%s%s","TEST-3...",result));    
      
          result = validateSolution(37, 8);
          System.out.println(String.format("%s%s","TEST-4...",result));    
      
          result = validateSolution(51, 12);
          System.out.println(String.format("%s%s","TEST-5...",result));    
      
          result = validateSolution(33, 7);
          System.out.println(String.format("%s%s","TEST-6...",result));    
      
          result = validateSolution(49, 10);
          System.out.println(String.format("%s%s","TEST-7...",result));    
      
          result = validateSolution(1, 0);
          System.out.println(String.format("%s%s","TEST-8...",result));    
      
          result = validateSolution(75, 18);
          System.out.println(String.format("%s%s","TEST-9...",result));    
      
      }
  }
  
  class Driver{
      public boolean run(Integer n, Integer expected){
  
          PLACEHOLDER_CLS_NAME sol = new PLACEHOLDER_CLS_NAME();
          return validateSolution(sol.PLACEHOLDER_FN_NAME(n),expected);
      }
      
      public boolean validateSolution(Integer actual, Integer expected){
          return actual.equals(expected);
      }
  }
  
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
source_py: def count_trailing_zeroes_factorial_number(n):
      count = 0
      i = 5
      while ((n / i) >= 1):
          count += int((n / i))
          i *= 5
      return int(count)
source_cpp: int count_trailing_zeroes_factorial_number(int n) {
    int count = 0;
    for ( int i = 5;
    n / i >= 1;
    i *= 5 ) count += n / i;
    return count;
  }