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Program.cs
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Program.cs
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using System;
using System.Collections.Generic;
namespace RankTransformOfAnArray
{
class Program
{
static void Main(string[] args)
{
int[] arr = { 100, 100, 100 };
Console.WriteLine(ArrayRankTransform(arr));
}
static int[] ArrayRankTransform(int[] arr)
{
var dict = new Dictionary<int, List<int>>();
var list = new List<int>();
for (int i = 0; i < arr.Length; i++)
{
if (!dict.ContainsKey(arr[i]))
{
dict[arr[i]] = new List<int> { i };
list.Add(arr[i]);
}
else
dict[arr[i]].Add(i);
}
int rank = 1;
list.Sort();
foreach (var num in list)
{
for (int i = 0; i < dict[num].Count; i++)
arr[dict[num][i]] = rank;
rank++;
}
return arr;
}
}
}