DS — hash map frequency #87

Medium 30 pts New · no attempts yet csharp

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Count frequency of most common element.

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Dictionary<int,int>

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using System;

class Program
{
    static void Main()
    {
        int[] a = { 1, 2, 2, 3, 3, 3 };
        var freq = new System.Collections.Generic.Dictionary<int, int>();
        foreach (var x in a) freq[x] = freq.GetValueOrDefault(x) + 1;
        int bestKey = 0, bestCnt = 0;
        foreach (var kv in freq) if (kv.Value > bestCnt) { bestCnt = kv.Value; bestKey = kv.Key; }
        Console.WriteLine(bestKey);
    }
}

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Explanation

Hash map for frequency counting.

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DS — hash map frequency #87

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