update 1021.remove-outermost-parentheses.java

Author: marklcrns

1021.remove-outermost-parentheses.java

@@ -98,11 +98,17 @@ public String removeOuterParentheses(String S) {
 			// stacked openings, then it pops off from the stack whenever it finds
 			// closing.
 			if (c == '(') {
-				if (open != 0) sb.append(c);
 				open++;
+				if (open == 1)
+					continue;
 			} else if (c == ')') {
 				open--;
-				if (open != 0) sb.append(c);
+			}
+
+			// If open > 0, Meaning theres, an open outer parenthesis:
+			// Append into buf
+			if (open > 0) {
+				sb.append(c);
 			}
 		}