From 9c8e14695cd945767820714e6565aae2693ef64f Mon Sep 17 00:00:00 2001
From: Matej Focko <me@mfocko.xyz>
Date: Wed, 2 Oct 2024 21:22:03 +0200
Subject: [PATCH] =?UTF-8?q?cs:=20add=20=C2=AB1331.=20Rank=20Transform=20of?=
 =?UTF-8?q?=20an=20Array=C2=BB?=
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Signed-off-by: Matej Focko <me@mfocko.xyz>
---
 cs/rank-transform-of-an-array.cs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 cs/rank-transform-of-an-array.cs

diff --git a/cs/rank-transform-of-an-array.cs b/cs/rank-transform-of-an-array.cs
new file mode 100644
index 0000000..182b6ad
--- /dev/null
+++ b/cs/rank-transform-of-an-array.cs
@@ -0,0 +1,14 @@
+public class Solution {
+    public int[] ArrayRankTransform(int[] arr) {
+        var unique = new SortedSet<int>();
+        foreach (var x in arr) {
+            unique.Add(x);
+        }
+
+        var ranks = unique.Select((item, index) => (item, index + 1)).ToDictionary();
+        for (int i = 0; i < arr.Length; ++i) {
+            arr[i] = ranks[arr[i]];
+        }
+        return arr;
+    }
+}