title: Count Natural Numbers Whose Permutation Greater Number
signature: fun countNaturalNumbersWhosePermutationGreaterNumber(n: Int): Int {
source_py: def count_natural_numbers_whose_permutation_greater_number(n):
      result = 0
      for i in range(1, 10):
          s = []
          if (i <= n):
              s.append(i)
              result += 1
          while (len(s) != 0):
              tp = s[(- 1)]
              s.pop()
              for j in range((tp % 10), 10):
                  x = ((tp * 10) + j)
                  if (x <= n):
                      s.append(x)
                      result += 1
      return result
source_cpp: int count_natural_numbers_whose_permutation_greater_number(int n) {
    int result = 0;
    for ( int i = 1;
    i <= 9;
    i ++ ) {
      stack < int > s;
      if ( i <= n ) {
        s . push ( i );
        result ++;
      }
      while ( ! s . empty ( ) ) {
        int tp = s . top ( );
        s . pop ( );
        for ( int j = tp % 10;
        j <= 9;
        j ++ ) {
          int x = tp * 10 + j;
          if ( x <= n ) {
            s . push ( x );
            result ++;
          }
        }
      }
    }
    return result;
  }
question_info.test_list: [{"idx": 0, "outputs": 48, "inputs": {"n": 69}}, {"idx": 1, "outputs": 48, "inputs": {"n": 72}}, {"idx": 2, "outputs": 52, "inputs": {"n": 88}}, {"idx": 3, "outputs": 7, "inputs": {"n": 7}}, {"idx": 4, "outputs": 45, "inputs": {"n": 66}}, {"idx": 5, "outputs": 28, "inputs": {"n": 34}}, {"idx": 6, "outputs": 20, "inputs": {"n": 23}}, {"idx": 7, "outputs": 31, "inputs": {"n": 37}}, {"idx": 8, "outputs": 27, "inputs": {"n": 33}}, {"idx": 9, "outputs": 18, "inputs": {"n": 21}}]
question_info.extension: kts
question_info.test_code: package main
  
  import kotlin.text.*
  import kotlin.math.*
  
  
  // SOLUTION CODE
  // ===================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE
  // ===================================
  fun validateSolution(actual:Int, expected:Int):Boolean{
    return actual.equals(expected)
  }
  fun driver(n: Int, expected:Int):String {
      try{
        if (validateSolution(PLACEHOLDER_FN_NAME(n), expected)) {
                return "PASSED"
        }
        return "FAILED"
      } catch (e: Exception){
        return e::class.simpleName as String
      }
  
  }
  
  fun main() {
      var result: String = ""
      result = driver(69, 48)
      println("TEST-0...${result}")
      
      result = driver(72, 48)
      println("TEST-1...${result}")
      
      result = driver(88, 52)
      println("TEST-2...${result}")
      
      result = driver(7, 7)
      println("TEST-3...${result}")
      
      result = driver(66, 45)
      println("TEST-4...${result}")
      
      result = driver(34, 28)
      println("TEST-5...${result}")
      
      result = driver(23, 20)
      println("TEST-6...${result}")
      
      result = driver(37, 31)
      println("TEST-7...${result}")
      
      result = driver(33, 27)
      println("TEST-8...${result}")
      
      result = driver(21, 18)
      println("TEST-9...${result}")
      
          
  }
  
  main()
question_info.entry_fn_name: countNaturalNumbersWhosePermutationGreaterNumber
question_info.entry_cls_name: Solution
question_info.test_case_ids: 0 1 2 3 4 5 6 7 8 9
question_info.commands: kotlinc -script __FILENAME__ -no-reflect -nowarn