From 35030f36952a295deb153331c569973a5ffa764d Mon Sep 17 00:00:00 2001
From: Shambhavi Sharma <60618802+ShambhaviSharma0110@users.noreply.github.com>
Date: Sun, 16 May 2021 22:05:08 +0530
Subject: [PATCH 1/5] added 189

---
 C++/189.Rotate array | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 C++/189.Rotate array

diff --git a/C++/189.Rotate array b/C++/189.Rotate array
new file mode 100644
index 00000000..3630b13e
--- /dev/null
+++ b/C++/189.Rotate array	
@@ -0,0 +1,28 @@
+class Solution {
+public:
+    void rotate(vector<int>& nums, int k) {
+        int n = nums.size();
+        k = k % n;
+        // we first reverse all the elements,[7 6 5 4 3 2 1]
+        for (int i = 0, j = n - 1; i < j; i++, j--) {
+            swap(nums[i], nums[j]);
+        }
+       // then we reverse the set of elements sized k for example [7 6 5 4 3 2 1] = [ 5 6 7 4 3 2 1] 
+        for (int i = 0, j = k - 1; i < j; i++, j--) {
+            swap(nums[i], nums[j]);
+        }
+        //finally we reverse the ending elements too = 5 6 7 1 2 3 4
+        for (int i = k, j = n - 1; i < j; i++, j--) {
+            swap(nums[i], nums[j]);
+        }
+    }
+};
+/*
+Input: nums = [1,2,3,4,5,6,7], k = 3
+Output: [5,6,7,1,2,3,4]
+
+Example 2:
+
+Input: nums = [-1,-100,3,99], k = 2
+Output: [3,99,-1,-100]
+*/

From 53219fb53d94793eb840862f0484139f044ff708 Mon Sep 17 00:00:00 2001
From: Shambhavi Sharma <60618802+ShambhaviSharma0110@users.noreply.github.com>
Date: Sun, 16 May 2021 22:10:22 +0530
Subject: [PATCH 2/5] added 189

---
 C++/189.Rotate array | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/C++/189.Rotate array b/C++/189.Rotate array
index 3630b13e..9da5258c 100644
--- a/C++/189.Rotate array	
+++ b/C++/189.Rotate array	
@@ -17,6 +17,9 @@ public:
         }
     }
 };
+
+Time complexity:O(n)
+Space Complexity:O(1)
 /*
 Input: nums = [1,2,3,4,5,6,7], k = 3
 Output: [5,6,7,1,2,3,4]

From f4f33fef86a9ae8d4fda9f2267d224a791170ce2 Mon Sep 17 00:00:00 2001
From: Shambhavi Sharma <60618802+ShambhaviSharma0110@users.noreply.github.com>
Date: Mon, 17 May 2021 11:28:21 +0530
Subject: [PATCH 3/5] Update 189.Rotate array

---
 C++/189.Rotate array | 1 +
 1 file changed, 1 insertion(+)

diff --git a/C++/189.Rotate array b/C++/189.Rotate array
index 9da5258c..890f5eb0 100644
--- a/C++/189.Rotate array	
+++ b/C++/189.Rotate array	
@@ -1,3 +1,4 @@
+difficulty level: Easy
 class Solution {
 public:
     void rotate(vector<int>& nums, int k) {

From bbff35623c22e843c61fc23e423ba05e28a5cec8 Mon Sep 17 00:00:00 2001
From: Shambhavi Sharma <60618802+ShambhaviSharma0110@users.noreply.github.com>
Date: Mon, 17 May 2021 11:33:47 +0530
Subject: [PATCH 4/5] added 189

---
 C++/{189.Rotate array => 189.Rotate-array} | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 rename C++/{189.Rotate array => 189.Rotate-array} (97%)

diff --git a/C++/189.Rotate array b/C++/189.Rotate-array
similarity index 97%
rename from C++/189.Rotate array
rename to C++/189.Rotate-array
index 890f5eb0..faed77b3 100644
--- a/C++/189.Rotate array	
+++ b/C++/189.Rotate-array
@@ -1,4 +1,4 @@
-difficulty level: Easy
+difficulty level: Medium
 class Solution {
 public:
     void rotate(vector<int>& nums, int k) {

From 72a3c2eaef8aa213c66f72b5b8e6a165d98dd0e5 Mon Sep 17 00:00:00 2001
From: Shambhavi Sharma <60618802+ShambhaviSharma0110@users.noreply.github.com>
Date: Mon, 17 May 2021 11:34:40 +0530
Subject: [PATCH 5/5] added 189

---
 C++/{189.Rotate-array => 189.Rotate-array.cpp} | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename C++/{189.Rotate-array => 189.Rotate-array.cpp} (100%)

diff --git a/C++/189.Rotate-array b/C++/189.Rotate-array.cpp
similarity index 100%
rename from C++/189.Rotate-array
rename to C++/189.Rotate-array.cpp