title: Length Longest Sub String Can Make Removed
signature: lengthLongestSubStringCanMakeRemoved(s) {
test_code: import 'dart:convert';
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  bool validateSolution(int actual, int expected){
      return actual.toString() == expected.toString();
  }
  
  String driver(s, int expected){
      try
      {
          if (validateSolution(PLACEHOLDER_FN_NAME(s), expected)){
              return "PASSED";
          }
          return "FAILED";
      }catch(exception_object){
          return exception_object.runtimeType.toString();
      }
  }
  
  int main() {
  
      print("TEST-0...${driver(
          "U", 
          0)
      }");
  
      print("TEST-1...${driver(
          "544", 
          0)
      }");
  
      print("TEST-2...${driver(
          "111", 
          0)
      }");
  
      print("TEST-3...${driver(
          " cDQaNxpRSOe", 
          0)
      }");
  
      print("TEST-4...${driver(
          "42920062459", 
          0)
      }");
  
      print("TEST-5...${driver(
          "00100101", 
          3)
      }");
  
      print("TEST-6...${driver(
          "FiC", 
          0)
      }");
  
      print("TEST-7...${driver(
          "302746335230", 
          0)
      }");
  
      print("TEST-8...${driver(
          "1", 
          0)
      }");
  
      print("TEST-9...${driver(
          "ZBLHiwGreUR ", 
          0)
      }");
  
      return 0;
  }
source_py: def length_longest_sub_string_can_make_removed(S):
      arr = []
      arr.append(['@', (- 1)])
      maxlen = 0
      for i in range(len(S)):
          arr.append([S[i], i])
          while ((len(arr) >= 3) and (arr[(len(arr) - 3)][0] == '1') and (arr[(len(arr) - 2)][0] == '0') and (arr[(len(arr) - 1)][0] == '0')):
              arr.pop()
              arr.pop()
              arr.pop()
          tmp = arr[(- 1)]
          maxlen = max(maxlen, (i - tmp[1]))
      return maxlen
source_cpp: int length_longest_sub_string_can_make_removed(string str) {
    vector < pair < char, int > > arr;
    arr . push_back ( {
      '@', - 1 }
      );
      int maxlen = 0;
      for ( int i = 0;
      i < str . length ( );
      ++ i ) {
        arr . push_back ( {
          str [ i ], i }
          );
          while ( arr . size ( ) >= 3 && arr [ arr . size ( ) - 3 ] . first == '1' && arr [ arr . size ( ) - 2 ] . first == '0' && arr [ arr . size ( ) - 1 ] . first == '0' ) {
            arr . pop_back ( );
            arr . pop_back ( );
            arr . pop_back ( );
          }
          int tmp = arr . back ( ) . second;
          maxlen = max ( maxlen, i - tmp );
        }
        return maxlen;
      }