update 22

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/_22.java

@@ -37,15 +37,15 @@ public List<String> generateParenthesis(int n) {
             return result;
         }
 
-        void backtrack(List<String> result, String par, int left, int right) {
+        void backtrack(List<String> result, String parenthesis, int left, int right) {
             if (left > 0) {
-                backtrack(result, par + "(", left - 1, right);
+                backtrack(result, parenthesis + "(", left - 1, right);
             }
             if (right > left) {
-                backtrack(result, par + ")", left, right - 1);
+                backtrack(result, parenthesis + ")", left, right - 1);
             }
             if (right == 0) {
-                result.add(par);
+                result.add(parenthesis);
             }
         }
     }