title: Print Maximum Shortest Distance
signature: class Solution {
  
      public long PrintMaximumShortestDistance(List<int> a, int n, int k) {
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(long actual, long expected){
              return new JavaScriptSerializer().Serialize(actual) == new JavaScriptSerializer().Serialize(expected);
          }
  
          public string driver(List<int> a, int n, int k, long expected){
              try{
                PLACEHOLDER_CLS_NAME solution_cls = new PLACEHOLDER_CLS_NAME();
                long pred_result = solution_cls.PLACEHOLDER_FN_NAME(a, n, k); 
                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>{2, 27, 66, 89, 96, 96}, 4, 4, 
                  1000000000
              );
              Console.WriteLine(string.Format(
                  "TEST-0...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{84, -38, -56, -20, -98, -40, -16, 22, 20, 98, -56, -32, -44, 30, -58, 26, -44, -32, 50, 46, 92}, 13, 11, 
                  1000000000
              );
              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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 23, 13, 
                  1000000000
              );
              Console.WriteLine(string.Format(
                  "TEST-2...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{20, 71, 66, 58, 74, 2, 63, 13, 1, 36, 28, 83, 24, 20, 85, 30, 59, 56, 8, 97, 58, 28, 28, 42}, 23, 17, 
                  1000000000
              );
              Console.WriteLine(string.Format(
                  "TEST-3...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-94, -88, -86, -68, -66, -64, -28, -12, 4, 18, 22, 28, 32, 34, 34, 40, 44, 46, 60, 68, 72, 78, 80, 84, 88, 96}, 16, 15, 
                  1000000000
              );
              Console.WriteLine(string.Format(
                  "TEST-4...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1}, 8, 13, 
                  1000000000
              );
              Console.WriteLine(string.Format(
                  "TEST-5...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{8, 13, 54, 59, 61, 69, 89, 90, 92}, 4, 8, 
                  1000000000
              );
              Console.WriteLine(string.Format(
                  "TEST-6...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-58, 50, -74, -8, -50, 90, 90, -2, -22, 8, -76, 16, 4, 56, 94, 36, 28, -42, 80, -88, 88, 52, 74, 40, 12, -72, -50, 50, 88, -54, 32, -24, -48, -66, -86, 40, -6, 14, 10, -88, 56, 80, -34}, 27, 42, 
                  4
              );
              Console.WriteLine(string.Format(
                  "TEST-7...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1}, 9, 12, 
                  1000000000
              );
              Console.WriteLine(string.Format(
                  "TEST-8...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{2, 60, 66, 39, 18, 60, 37, 75, 3, 64, 24, 16, 72, 95, 96, 44, 23, 58, 58, 33, 24, 96}, 21, 17, 
                  1000000000
              );
              Console.WriteLine(string.Format(
                  "TEST-9...{0}",
                  result)
              );
          }
      }
  }
  
source_py: def print_maximum_shortest_distance(a, n, k):
      b = dict()
      for i in range(n):
          x = a[i]
          d = min((1 + i), (n - i))
          if (x not in b.keys()):
              b[x] = d
          else:
              b[x] = min(d, b[x])
      ans = (10 ** 9)
      for i in range(n):
          x = a[i]
          if ((x != (k - x)) and ((k - x) in b.keys())):
              ans = min(max(b[x], b[(k - x)]), ans)
      return ans
source_cpp: int print_maximum_shortest_distance(vector<int> a, int n, int k) {
    unordered_map < int, int > b;
    for ( int i = 0;
    i < n;
    i ++ ) {
      int x = a [ i ];
      int d = min ( 1 + i, n - i );
      if ( b . find ( x ) == b . end ( ) ) b [ x ] = d;
      else b [ x ] = min ( d, b [ x ] );
    }
    int ans = INT_MAX;
    for ( int i = 0;
    i < n;
    i ++ ) {
      int x = a [ i ];
      if ( x != k - x && b . find ( k - x ) != b . end ( ) ) ans = min ( max ( b [ x ], b [ k - x ] ), ans );
    }
    return ans;
  }