title: Maximum Length Subsequence Difference Adjacent Elements Either 0 1
signature: class Solution {
  
      public int MaximumLengthSubsequenceDifferenceAdjacentElementsEither01(List<int> arr, int n) {
test_code: using System;
  using System.Numerics;
  using System.Diagnostics;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  using System.Security.Cryptography;
  using System.Web.UI;
  using System.Web.Script.Serialization;
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  namespace EvaluatePrediction {
      class TestRunner {
          public bool ValidateSolution(int actual, int expected){
              return new JavaScriptSerializer().Serialize(actual) == new JavaScriptSerializer().Serialize(expected);
          }
  
          public string driver(List<int> arr, int n, int expected){
              try{
                PLACEHOLDER_CLS_NAME solution_cls = new PLACEHOLDER_CLS_NAME();
                int pred_result = solution_cls.PLACEHOLDER_FN_NAME(arr, n); 
                if (ValidateSolution(
                      pred_result,
                      expected)){
                  return "PASSED";
                }
                return "FAILED";
              } 
              catch (Exception exception_obj)
              {
                return exception_obj.GetType().FullName;
              }
          }
          static void Main(string[] args) {
              TestRunner runner = new TestRunner();
              String result;
              result = runner.driver(
                  new List<int>{4, 5, 9, 31, 31, 37, 41, 55, 56, 61, 79, 81, 89, 93}, 12, 
                  2
              );
              Console.WriteLine(string.Format(
                  "TEST-0...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-76, 96, -68, -16, 22, -24, -24, 6, 98, -82, 54, -80, 46, 0, 0, -50}, 15, 
                  2
              );
              Console.WriteLine(string.Format(
                  "TEST-1...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 29, 
                  29
              );
              Console.WriteLine(string.Format(
                  "TEST-2...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{97, 93, 43, 51, 15, 33, 13, 96, 39, 89, 78, 25, 45, 6, 64, 54}, 13, 
                  2
              );
              Console.WriteLine(string.Format(
                  "TEST-3...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-98, -78, -72, -70, -68, -58, -56, -54, -46, -44, -38, -34, -30, -24, -18, -16, -14, -12, 2, 6, 8, 8, 10, 10, 16, 24, 26, 28, 40, 42, 44, 56, 58, 62, 66, 66, 78, 86}, 19, 
                  1
              );
              Console.WriteLine(string.Format(
                  "TEST-4...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{1, 1, 0, 1, 0, 0}, 3, 
                  3
              );
              Console.WriteLine(string.Format(
                  "TEST-5...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{7, 8, 10, 11, 12, 15, 16, 16, 19, 21, 23, 23, 23, 25, 26, 35, 38, 43, 46, 47, 51, 52, 53, 57, 60, 61, 66, 67, 69, 74, 75, 81, 83, 84, 88, 92, 94, 98, 98, 99}, 34, 
                  3
              );
              Console.WriteLine(string.Format(
                  "TEST-6...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{14, -40}, 1, 
                  1
              );
              Console.WriteLine(string.Format(
                  "TEST-7...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 38, 
                  38
              );
              Console.WriteLine(string.Format(
                  "TEST-8...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{59, 70, 53}, 1, 
                  1
              );
              Console.WriteLine(string.Format(
                  "TEST-9...{0}",
                  result)
              );
          }
      }
  }
  
source_py: def maximum_length_subsequence_difference_adjacent_elements_either_0_1(arr, n):
      mls = []
      max = 0
      for i in range(n):
          mls.append(1)
      for i in range(n):
          for j in range(i):
              if ((abs((arr[i] - arr[j])) <= 1) and (mls[i] < (mls[j] + 1))):
                  mls[i] = (mls[j] + 1)
      for i in range(n):
          if (max < mls[i]):
              max = mls[i]
      return max
source_cpp: int maximum_length_subsequence_difference_adjacent_elements_either_0_1(vector<int> arr, int n) {
    int mls [ n ], max = 0;
    for ( int i = 0;
    i < n;
    i ++ ) mls [ i ] = 1;
    for ( int i = 1;
    i < n;
    i ++ ) for ( int j = 0;
    j < i;
    j ++ ) if ( abs ( arr [ i ] - arr [ j ] ) <= 1 && mls [ i ] < mls [ j ] + 1 ) mls [ i ] = mls [ j ] + 1;
    for ( int i = 0;
    i < n;
    i ++ ) if ( max < mls [ i ] ) max = mls [ i ];
    return max;
  }