Refactor

tests/s0032_longest_valid_parentheses.cpp

@@ -5,27 +5,27 @@
 TEST(Problem32, Case1) {
   string i{"(()"};
   int o{2};
-  Solution solution;
+  S0032 solution;
   EXPECT_EQ(solution.longestValidParentheses(i), o);
 }
 
 TEST(Problem32, Case2) {
   string i{")()())"};
   int o{4};
-  Solution solution;
+  S0032 solution;
   EXPECT_EQ(solution.longestValidParentheses(i), o);
 }
 
 TEST(Problem32, Case3) {
   string i{"())"};
   int o{2};
-  Solution solution;
+  S0032 solution;
   EXPECT_EQ(solution.longestValidParentheses(i), o);
 }
 
 TEST(Problem32, Case4) {
   string i{"()(()"};
   int o{2};
-  Solution solution;
+  S0032 solution;
   EXPECT_EQ(solution.longestValidParentheses(i), o);
 }