Merge pull request neetcode-gh#639 from sharansalian/main

Add 54-Spiral-Matrix.kt

Author: Ahmad-A0

kotlin/54-Spiral-Matrix.kt

@@ -0,0 +1,51 @@
+package kotlin
+
+
+fun spiralOrder(matrix: Array<IntArray>): List<Int> {
+    var res = mutableListOf<Int>()
+    var top = 0
+    var right = matrix.first().size
+    var left = 0
+    var bottom = matrix.size
+
+    while (top < bottom && left < right) {
+
+        //get every i in the top row
+        for (i in left until right) {
+            res.add(matrix[top][i])
+        }
+        top += 1
+
+        // get every i in the right col
+        for (i in top until bottom) {
+            res.add(matrix[i][right - 1])
+        }
+        right -= 1
+
+        if (!(left < right && top < bottom)) {
+            break
+        }
+
+        //get every i in the bottom row
+        for (i in right - 1 downTo left) {
+            res.add(matrix[bottom - 1][i])
+        }
+        bottom -= 1
+
+        //get every i in the left col
+        for (i in bottom - 1 downTo top) {
+            res.add(matrix[i][left])
+        }
+
+        left += 1
+
+    }
+
+    return res
+
+}
+
+fun main() {
+    val matrix = arrayOf(intArrayOf(1, 2, 3), intArrayOf(4, 5, 6), intArrayOf(7, 8, 9))
+    println(spiralOrder(matrix))
+}