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  1. Lonely Integer
  2. Discussions

Lonely Integer

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457 Discussions

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  • PThie
     + 0 comments

    Python solution using dictionary instead of Counter method

    def lonelyinteger(a):
    count = {}
    for i in a:
        if i in count:
            count[i] += 1
        else:
            count[i] = 1
    
    out = [ele for ele in count.keys() if count[ele] == 1][0]
    return out

  • amansaini_hitbu1
     + 0 comments

    public static int lonelyinteger(List a) { // Write your code here int unique = 0;

        for(int i : a){
        unique = unique ^ i;
    }
    return unique;
}

  • m_not_root
     + 0 comments
    from collections import Counter
def lonelyinteger(a):
    # Write your code here
    data = Counter(a)
    unique_elements = [key for key, value in data.items() if value == 1]
    print(unique_elements[0])
    return unique_elements[0]

  • m_not_root
     + 0 comments
    from collections import Counter
def lonelyinteger(a):
    # Write your code here
    data = Counter(a)
    unique_elements = [key for key, value in data.items() if value == 1]
    print(unique_elements[0])
    return unique_elements[0]

  • crono7
     + 0 comments

    Java

    public static int lonelyinteger(List<Integer> a) {
    // Write your code here
        Collections.sort(a);
        for(int i = 0; i < a.size(); i += 2){
            if( i == a.size() -1 || a.get(i) != a.get(i + 1))
                return a.get(i);
        }
        return 0;
    }

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