From 80ae33d3d0b99824d6afd1ce63d9746daf679aac Mon Sep 17 00:00:00 2001
From: Matej Focko <me@mfocko.xyz>
Date: Mon, 14 Apr 2025 13:06:39 +0200
Subject: [PATCH] =?UTF-8?q?cs:=20add=20=C2=AB1534.=20Count=20Good=20Triple?=
=?UTF-8?q?ts=C2=BB?=
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URL: https://leetcode.com/problems/count-good-triplets/
Signed-off-by: Matej Focko <me@mfocko.xyz>
---
cs/count-good-triplets.cs | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
create mode 100644 cs/count-good-triplets.cs
diff --git a/cs/count-good-triplets.cs b/cs/count-good-triplets.cs
new file mode 100644
index 0000000..10aa8f1
--- /dev/null
+++ b/cs/count-good-triplets.cs
@@ -0,0 +1,22 @@
+public class Solution {
+ private IEnumerable<(int, int, int)> Triplets(int n) =>
+ Enumerable.Range(0, n).SelectMany(
+ i => Enumerable.Range(i + 1, n - i - 1).SelectMany(
+ j => Enumerable.Range(j + 1, n - j - 1).Select(
+ k => (i, j, k)
+ )
+ )
+ );
+
+ public int CountGoodTriplets(int[] arr, int a, int b, int c) =>
+ Triplets(arr.Length)
+ .Select(idxs => {
+ var (i, j, k) = idxs;
+ return (arr[i], arr[j], arr[k]);
+ })
+ .Where(nums => {
+ var (x, y, z) = nums;
+ return Math.Abs(x - y) <= a && Math.Abs(y - z) <= b && Math.Abs(x - z) <= c;
+ })
+ .Count();
+}