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

Sales by Match

  • pt023150
     + 0 comments

    java(8) 

    public static int sockMerchant(int n, List<Integer> ar) {
    // Write your code here

    int sockesPair = 0;
    HashMap<Integer, Integer> map = new HashMap<>();

    for (int i : ar) {
        if (map.containsKey(i)) {
            map.put(i, map.get(i) + 1);
        } else {
            map.put(i, 1);
        }

    }

    for (int i : map.keySet()) {

        sockesPair += (map.get(i) / 2);
    }
    return sockesPair;
}