rotate-array

rotate-array/sol.go

@@ -0,0 +1,19 @@
+package main
+
+// Time: O(n)
+// Space: O(1) (original array modified)
+func rotate(nums []int, k int) {
+	c, a, l, idx, num := 0, 0, len(nums), 0, nums[0]
+	for c != l {
+		if idx == a && c != 0 {
+			a++
+			idx = a
+			num = nums[idx]
+		}
+		new_idx := (idx + k) % l
+		old_num := nums[new_idx]
+		nums[new_idx] = num
+		idx, num = new_idx, old_num
+		c++
+	}
+}