title: Remove Minimum Number Elements No Common Element Exist Array
signature: class Solution {
  
      public Integer removeMinimumNumberElementsNoCommonElementExistArray(ArrayList<Integer> a, ArrayList<Integer> b, Integer n, Integer m) {
test_code: import static java.util.Map.entry;  
  import java.util.*;
  import java.lang.*;
  // TESTING CODE 
  // ============================================
  class QuestionEvaluator {
      public static String validateSolution(ArrayList<Integer> a, ArrayList<Integer> b, Integer n, Integer m, Integer expected){
          try{
              Driver driver = new Driver();
              if (driver.run(a, b, n, m,expected)){
                  return "PASSED";
              }
              return "FAILED";
              
          } catch (Exception exception_obj){
              return exception_obj.getClass().getSimpleName();
          }
  
      }
      public static void main(String[] args) {
          String result;
          result = validateSolution(new ArrayList<>(Arrays.asList(4, 7, 10, 12, 12, 24, 29, 38, 45, 51, 53, 54, 59, 68, 72, 73, 85, 86, 88, 92, 92, 95)), new ArrayList<>(Arrays.asList(7, 9, 17, 23, 25, 26, 29, 32, 35, 56, 56, 58, 59, 59, 62, 63, 72, 82, 85, 86, 95, 97)), 15, 13, 3);
          System.out.println(String.format("%s%s","TEST-0...",result));    
      
          result = validateSolution(new ArrayList<>(Arrays.asList(-6, 48, -70, 14, -86, 56, 80, -64, 64, -88, -14, 78, 14, -18, 52, 2, 22, 88)), new ArrayList<>(Arrays.asList(-62, -58, 60, -30, 42, 8, 66, -48, -18, 64, -76, -90, -48, -90, -24, 64, -88, -98)), 15, 9, 2);
          System.out.println(String.format("%s%s","TEST-1...",result));    
      
          result = validateSolution(new ArrayList<>(Arrays.asList(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1)), new ArrayList<>(Arrays.asList(0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1)), 10, 10, 9);
          System.out.println(String.format("%s%s","TEST-2...",result));    
      
          result = validateSolution(new ArrayList<>(Arrays.asList(10, 93, 2, 16, 36, 49, 36, 86, 6, 99, 95, 2)), new ArrayList<>(Arrays.asList(99, 28, 7, 21, 62, 89, 82, 41, 43, 77, 8, 14)), 6, 10, 0);
          System.out.println(String.format("%s%s","TEST-3...",result));    
      
          result = validateSolution(new ArrayList<>(Arrays.asList(-98, -96, -80, -64, -42, -30, -6, 10, 62, 66, 82)), new ArrayList<>(Arrays.asList(-62, -50, -42, 24, 44, 46, 52, 54, 60, 72, 72)), 9, 6, 1);
          System.out.println(String.format("%s%s","TEST-4...",result));    
      
          result = validateSolution(new ArrayList<>(Arrays.asList(1, 1, 0, 1, 1)), new ArrayList<>(Arrays.asList(1, 1, 1, 0, 0)), 4, 2, 4);
          System.out.println(String.format("%s%s","TEST-5...",result));    
      
          result = validateSolution(new ArrayList<>(Arrays.asList(7, 11, 13, 15, 21, 33, 36, 39, 66, 99)), new ArrayList<>(Arrays.asList(23, 36, 42, 44, 62, 65, 70, 78, 82, 89)), 9, 9, 1);
          System.out.println(String.format("%s%s","TEST-6...",result));    
      
          result = validateSolution(new ArrayList<>(Arrays.asList(-40)), new ArrayList<>(Arrays.asList(-98)), 0, 0, 0);
          System.out.println(String.format("%s%s","TEST-7...",result));    
      
          result = validateSolution(new ArrayList<>(Arrays.asList(0, 0, 0, 0, 0, 0, 0, 0, 0, 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, 1, 1, 1, 1, 1, 1, 1)), new ArrayList<>(Arrays.asList(0, 0, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1)), 31, 26, 24);
          System.out.println(String.format("%s%s","TEST-8...",result));    
      
          result = validateSolution(new ArrayList<>(Arrays.asList(79, 91, 31, 16, 28, 45, 37, 43, 73, 73, 76, 28, 71, 60, 64, 60, 99, 36, 47, 38, 65, 34, 22, 94, 84, 51, 72, 45, 71, 2)), new ArrayList<>(Arrays.asList(58, 94, 12, 27, 98, 38, 75, 20, 94, 43, 32, 90, 23, 41, 88, 2, 62, 96, 53, 57, 48, 79, 6, 16, 11, 46, 73, 57, 67, 7)), 18, 18, 1);
          System.out.println(String.format("%s%s","TEST-9...",result));    
      
      }
  }
  
  class Driver{
      public boolean run(ArrayList<Integer> a, ArrayList<Integer> b, Integer n, Integer m, Integer expected){
  
          PLACEHOLDER_CLS_NAME sol = new PLACEHOLDER_CLS_NAME();
          return validateSolution(sol.PLACEHOLDER_FN_NAME(a, b, n, m),expected);
      }
      
      public boolean validateSolution(Integer actual, Integer expected){
          return actual.equals(expected);
      }
  }
  
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
source_py: def remove_minimum_number_elements_no_common_element_exist_array(a, b, n, m):
      countA = dict()
      countB = dict()
      for i in range(n):
          countA[a[i]] = (countA.get(a[i], 0) + 1)
      for i in range(n):
          countB[b[i]] = (countB.get(b[i], 0) + 1)
      res = 0
      for x in countA:
          if (x in countB.keys()):
              res += min(countA[x], countB[x])
      return res
source_cpp: int remove_minimum_number_elements_no_common_element_exist_array(vector<int> a, vector<int> b, int n, int m) {
    unordered_map < int, int > countA, countB;
    for ( int i = 0;
    i < n;
    i ++ ) countA [ a [ i ] ] ++;
    for ( int i = 0;
    i < m;
    i ++ ) countB [ b [ i ] ] ++;
    int res = 0;
    for ( auto x : countA ) if ( countB . find ( x . first ) != countB . end ( ) ) res += min ( x . second, countB [ x . first ] );
    return res;
  }