Create 0189-rotate-array.java

Author: AP-Repositories

java/0189-rotate-array.java

@@ -0,0 +1,32 @@
+class Solution {
+    public void rotate(int[] nums, int k) {
+        //Do not return anything, modify nums in-place instead
+        k = k % nums.length;
+        int l = 0, r = nums.length - 1;
+        while(l < r) {
+            int tmp = nums[l];
+            nums[l] = nums[r];
+            nums[r] = tmp;
+            l += 1;
+            r -= 1;
+        }
+        l = 0;
+        r = k - 1;
+        while(l < r) {
+            int tmp = nums[l];
+            nums[l] = nums[r];
+            nums[r] = tmp;
+            l += 1;
+            r -= 1;
+        }
+        l = k;
+        r = nums.length - 1;
+        while(l < r) {
+            int tmp = nums[l];
+            nums[l] = nums[r];
+            nums[r] = tmp;
+            l += 1;
+            r -= 1;
+        }
+    }
+}