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  1. Lonely Integer
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Lonely Integer

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  • Reshmafredy999
     + 0 comments

    Without count/counter

    def lonelyinteger(a):
    # Write your code here
    new_arr=[]
    for item in a:
        if item in new_arr:
            new_arr.remove(item)
        else:
            new_arr.append(item)
    return new_arr[0]

  • nelarakipaj
     + 0 comments

    Python 3 Solution Readable & Optimised

    def lonelyinteger(a): for i in a: if a.count(i)==1: return i

  • nandun5
     + 0 comments
        public static int lonelyinteger(List<int> a)
    {
        return a.GroupBy(i => i).Single(g => g.Count() == 1).Key;
    }

  • robertstanton95
     + 0 comments

    One liner:

    return [i for i in a if a.count(i) == 1][0]

  • cc2864
     + 0 comments

    counters: def lonelyinteger(a): times = Counter(a)

    q =[k for k in times if times[k]==1]
return q[0]