public void OJ032_LongestValidParenthesesTest2()
 {
     int result = new OJ032_LongestValidParentheses().LongestValidParentheses(")()())");
     Assert.AreEqual(4, result);
 }
 public void OJ032_LongestValidParenthesesTest1()
 {
     int result = new OJ032_LongestValidParentheses().LongestValidParentheses("(()");
     Assert.AreEqual(2, result);
 }