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  1. Ice Cream Parlor
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Ice Cream Parlor

  • jimiwills
     + 0 comments
    public static List<int> IcecreamParlor(int m, int[] arr)
{
    var pairs = arr.Select((x, i) => (x, i)).OrderBy(p => p.x).ToArray();
    arr = pairs.Select(p => p.x).ToArray();
    var idxs = pairs.Select(p => p.i+1).ToArray();
    var i=0;
    var j=arr.Length-1;
    while(true){
        var v = arr[i] + arr[j];
        if(v == m) return new List<int>{idxs[i], idxs[j]}.Order().ToList();
        if(v > m) j--;
        if(v < m) i++;
    }
}