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  1. Lonely Integer
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Lonely Integer

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461 Discussions

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  • dcruz14
     + 0 comments

    I wanna recieve feedback about my Javascript solution, thxs!:

    function lonelyinteger(a) {
    // Write your code here
    a.sort((a, b) => a - b);
    let aux=0
    for(let i=0;i<a.length;i++){
        if(a[i]!=a[i+1]) aux=a[i]
        else i++
    }
    return aux;

}

  • featuriz
     + 0 comments
    func lonelyinteger(a []int32) int32 {
    // Write your code here
    // var r int32 = 0
    // for _, a := range a{
    //     r ^= a
    // }
    // return r
    var result int32 = 0
    m := make(map[int32]int32)
    for _, v :=range a{
        value, exists := m[v]
        if exists{
            m[v] = value+1
            // fmt.Printf("Exist: key= %d, not= %d", v, value+1)
        }else{
            m[v] = 1
            // fmt.Printf("Newone: key= %d, not= %d", v, 1)
        }
    }
    for key, value := range m{
        if value == 1{
            result = key
        }
    }
    return result
}

  • calancea_bianca1
     + 0 comments
    def lonelyinteger(a):
    # Write your code here
    count_array=[0]*100
    
    for i in a:
        count_array[i]+=1
        
    for i in range(0,len(count_array)):
        if count_array[i]==1:
            return i

  • ryanr99
     + 0 comments

    def lonelyinteger(a): # Write your code here data = Counter(a)

    for key, value in data.items():
    if value == 1:
        return key

  • 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