We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
  1. Prepare
  2. Interview Preparation Kit
  3. Sales by Match
  4. Discussions

Sales by Match

Sort by

recency

|

5978 Discussions

|

  • vknakul43
     + 0 comments

    Simple Solution

    Java

            int[] pairs = new int[100];
        int pairCount = 0;
        for (int i: ar)
        pairs[i - 1]++;
        
        for(int i: pairs)
        pairCount += (i / 2);
        
        return pairCount;
    }

    C++

    int sockMerchant(int n, vector<int> ar) {
    vector<int> pairs(100, 0);
    for (int i: ar)
    pairs[i - 1]++;
    int pairCount = 0;
    for (int i = 0; i < 100; i++) {
        pairCount += (pairs[i] / 2);
    }
    return pairCount;
}

  • alban_tyrex
     + 0 comments

    Here is my c++ solution , you can find the video explanation here : https://youtu.be/HPIhFXx_DVM

    int sockMerchant(int n, vector<int> ar) {
    map<int, int>mp;
    int result = 0;
    for(int i = 0; i < ar.size(); i++){
        if(mp[ar[i]]){
            result ++;
            mp.erase(ar[i]);
            continue;
        }
        mp[ar[i]]++;
    }
    return result;
}

  • 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;
}

  • bradencook98
     + 2 comments
    def sockMerchant(n, ar):
    socks = set()
    pairs = 0
    for sock in ar:
        if sock in socks:
            pairs += 1
            socks.remove(sock)
        else:
            socks.add(sock)
    return pairs

  • aliramikhalil773
     + 0 comments

    Here my solution in Python 

    def sockMerchant(n, ar):
    # Write your code here
    pairs = {}
    for num in ar:
        pairs[num] = pairs.get(num, 0) + 1
    pairs_count = sum(count // 2 for count in pairs.values())
    return pairs_count