Redo q20

Author: Zanger67

my-submissions/e20 v2.java

@@ -0,0 +1,32 @@
+
+class Solution {
+    public boolean isValid(String s) {
+        Stack<Character> temp = new Stack<>();
+
+        for (Character c : s.toCharArray()) {
+            switch (c) {
+                case '[' :
+                case '{' :
+                case '(' :
+                    temp.push(c);
+                    break;
+                case ']' :
+                    if (temp.isEmpty() || temp.pop() != '[')
+                        return false;
+                    break;
+                case '}' :
+                    if (temp.isEmpty() || temp.pop() != '{')
+                        return false;
+                    break;
+                case ')' :
+                    if (temp.isEmpty() || temp.pop() != '(')
+                        return false;
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        return temp.isEmpty();
+    }
+}