title: Find Position Given Number Among Numbers Made 4 7
signature: class Solution {
  
      public Integer findPositionGivenNumberAmongNumbersMade47(String n) {
source_py: def find_position_given_number_among_numbers_made_4_7(n):
      i = 0
      j = len(n)
      pos = 0
      while (i < j):
          if (n[i] == '4'):
              pos = ((pos * 2) + 1)
          if (n[i] == '7'):
              pos = ((pos * 2) + 2)
          i = (i + 1)
      return pos
source_cpp: int find_position_given_number_among_numbers_made_4_7(string n) {
    int i = 0, pos = 0;
    while ( n [ i ] != '\0' ) {
      switch ( n [ i ] ) {
        case '4' : pos = pos * 2 + 1;
        break;
        case '7' : pos = pos * 2 + 2;
        break;
      }
      i ++;
    }
    return pos;
  }
question_info.extension: java
question_info.entry_fn_name: findPositionGivenNumberAmongNumbersMade47
question_info.entry_cls_name: Solution
question_info.test_list: [{"idx": 0, "outputs": 2, "inputs": {"n": "7"}}, {"idx": 1, "outputs": 5, "inputs": {"n": "305745689"}}, {"idx": 2, "outputs": 7, "inputs": {"n": "444"}}, {"idx": 3, "outputs": 1, "inputs": {"n": "4"}}, {"idx": 4, "outputs": 5, "inputs": {"n": "2074"}}, {"idx": 5, "outputs": 2, "inputs": {"n": "27"}}, {"idx": 6, "outputs": 8, "inputs": {"n": "447"}}, {"idx": 7, "outputs": 0, "inputs": {"n": "255"}}, {"idx": 8, "outputs": 0, "inputs": {"n": "10000111111011"}}, {"idx": 9, "outputs": 0, "inputs": {"n": "fAKcSDRTNz"}}]
question_info.test_code: import static java.util.Map.entry;  
  import java.util.*;
  import java.lang.*;
  // TESTING CODE 
  // ============================================
  class QuestionEvaluator {
      public static String validateSolution(String 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("7", 2);
          System.out.println(String.format("%s%s","TEST-0...",result));    
      
          result = validateSolution("305745689", 5);
          System.out.println(String.format("%s%s","TEST-1...",result));    
      
          result = validateSolution("444", 7);
          System.out.println(String.format("%s%s","TEST-2...",result));    
      
          result = validateSolution("4", 1);
          System.out.println(String.format("%s%s","TEST-3...",result));    
      
          result = validateSolution("2074", 5);
          System.out.println(String.format("%s%s","TEST-4...",result));    
      
          result = validateSolution("27", 2);
          System.out.println(String.format("%s%s","TEST-5...",result));    
      
          result = validateSolution("447", 8);
          System.out.println(String.format("%s%s","TEST-6...",result));    
      
          result = validateSolution("255", 0);
          System.out.println(String.format("%s%s","TEST-7...",result));    
      
          result = validateSolution("10000111111011", 0);
          System.out.println(String.format("%s%s","TEST-8...",result));    
      
          result = validateSolution("fAKcSDRTNz", 0);
          System.out.println(String.format("%s%s","TEST-9...",result));    
      
      }
  }
  
  class Driver{
      public boolean run(String 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
question_info.test_case_ids: 0 1 2 3 4 5 6 7 8 9
question_info.commands: java __FILENAME__