rotate image solution

Author: yhkee0404

rotate-image/yhkee0404.go

@@ -0,0 +1,14 @@
+func rotate(matrix [][]int)  {
+    for i := range len(matrix) {
+        for j := i + 1; j != len(matrix[i]); j++ { // T(n) = O(n)
+            matrix[i][j], matrix[j][i] = matrix[j][i], matrix[i][j]
+        }
+    }
+    for _, row := range matrix {
+        for i, j := 0, len(row) - 1; i < j; {
+            row[i], row[j] = row[j], row[i]
+            i++
+            j--
+        } 
+    }
+}