title: Count Natural Numbers Whose Permutation Greater Number
signature: function countNaturalNumbersWhosePermutationGreaterNumber(n: number): number {
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.entry_cls_name: Solution
question_info.test_code: 
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function convertToString(value: any): string{
      return JSON.stringify(value, function (key, val) {
          if (val instanceof Set) {
              return Array.from(val);
          } return val;});
  }
  
  function validateSolution(actual: number, expected: number): boolean {
      return convertToString(actual) === convertToString(expected);
  }
  
  function driver(n: number, expected:number): string {
      try{
          if (validateSolution(PLACEHOLDER_FN_NAME(n),expected)){
              return "PASSED";
          }
          return "FAILED";
      } catch (error) {
        return error.name;
      }
      
  }
      
  function main(){
    let result = '';
    result = driver(69, 48);
    console.log(`TEST-0...${result}`);
  
    result = driver(72, 48);
    console.log(`TEST-1...${result}`);
  
    result = driver(88, 52);
    console.log(`TEST-2...${result}`);
  
    result = driver(7, 7);
    console.log(`TEST-3...${result}`);
  
    result = driver(66, 45);
    console.log(`TEST-4...${result}`);
  
    result = driver(34, 28);
    console.log(`TEST-5...${result}`);
  
    result = driver(23, 20);
    console.log(`TEST-6...${result}`);
  
    result = driver(37, 31);
    console.log(`TEST-7...${result}`);
  
    result = driver(33, 27);
    console.log(`TEST-8...${result}`);
  
    result = driver(21, 18);
    console.log(`TEST-9...${result}`);
  
  };
  
  main();
question_info.extension: ts
question_info.entry_fn_name: countNaturalNumbersWhosePermutationGreaterNumber
question_info.test_case_ids: 0 1 2 3 4 5 6 7 8 9
question_info.commands: tsc --target es2020 --lib es5,dom,es2015,es2020 __FILENAME__
question_info.commands: node __FILENAME__.js