From a0fefa018c61806becd81ed791fb09da28115752 Mon Sep 17 00:00:00 2001
From: Noura Algohary <noura.malgohary@gmail.com>
Date: Fri, 28 Apr 2023 01:01:30 +0300
Subject: [PATCH 1/2] add day 27 challenge

---
 .../27- Bulb Switcher (Noura Algohary).cpp           | 12 ++++++++++++
 .../27- Bulb Switcher (Noura Algohary).py            | 11 +++++++++++
 2 files changed, 23 insertions(+)
 create mode 100644 04- April/27- Bulb Switcher/27- Bulb Switcher (Noura Algohary).cpp
 create mode 100644 04- April/27- Bulb Switcher/27- Bulb Switcher (Noura Algohary).py

diff --git a/04- April/27- Bulb Switcher/27- Bulb Switcher (Noura Algohary).cpp b/04- April/27- Bulb Switcher/27- Bulb Switcher (Noura Algohary).cpp
new file mode 100644
index 000000000..961cb34c3
--- /dev/null
+++ b/04- April/27- Bulb Switcher/27- Bulb Switcher (Noura Algohary).cpp	
@@ -0,0 +1,12 @@
+// Author: Noura Algohary
+
+class Solution {
+public:
+    int bulbSwitch(int n) {
+        // bulbs are counted (turned on) when it have odd number of divisors
+        // only numbers with perfect square roots have odd divisors
+        // to count the number of perfect square roots in n,
+        // it must be equal to sqrt(n)
+        return sqrt(n);
+    }
+};
\ No newline at end of file
diff --git a/04- April/27- Bulb Switcher/27- Bulb Switcher (Noura Algohary).py b/04- April/27- Bulb Switcher/27- Bulb Switcher (Noura Algohary).py
new file mode 100644
index 000000000..effb9854e
--- /dev/null
+++ b/04- April/27- Bulb Switcher/27- Bulb Switcher (Noura Algohary).py	
@@ -0,0 +1,11 @@
+# Author: Noura Algohary
+
+class Solution:
+    def bulbSwitch(self, n: int) -> int:
+        # bulbs are counted (turned on) when it have odd number of divisors
+        # only numbers with perfect square roots have odd divisors
+        # to count the number of perfect square roots in n,
+        # it must be equal to sqrt(n)
+
+        return int(n ** 0.5)
+        
\ No newline at end of file

From 03f1976041788310ddb1e87b6f2a3c549c1d1d7a Mon Sep 17 00:00:00 2001
From: 7oSkaaa <ahmed.7oSkaa@gmail.com>
Date: Fri, 28 Apr 2023 01:11:02 +0000
Subject: [PATCH 2/2] Add new daily problem

---
 .github/data/problems.json                   | 4 ++++
 04- April/28- Similar String Groups/.gitkeep | 0
 2 files changed, 4 insertions(+)
 create mode 100644 04- April/28- Similar String Groups/.gitkeep

diff --git a/.github/data/problems.json b/.github/data/problems.json
index a867e1ce9..ada23e045 100644
--- a/.github/data/problems.json
+++ b/.github/data/problems.json
@@ -473,6 +473,10 @@
         {
             "day": "27",
             "title": "Bulb Switcher"
+        },
+        {
+            "day": "28",
+            "title": "Similar String Groups"
         }
     ]
 }
\ No newline at end of file
diff --git a/04- April/28- Similar String Groups/.gitkeep b/04- April/28- Similar String Groups/.gitkeep
new file mode 100644
index 000000000..e69de29bb