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  1. Prepare
  2. Algorithms
  3. Implementation
  4. Sales by Match
  5. Discussions

Sales by Match

  • wilson155079
     + 0 comments
        public static int sockMerchant(int n, List<Integer> ar) {
    // Write your code here
        Map<Integer, Integer> map = new HashMap<>();
            
        ar.stream().forEach(val -> {
            if (map.containsKey(val)) {
                map.remove(val);
            } else {
                map.put(val, 1);
            }
        });
        
        return (ar.size() - map.keySet().size()) / 2;
    }