Mind palace

02-22

1541. Minimum Insertions to Balance a Parentheses String

02-15

1614. Maximum Nesting Depth of the Parentheses

01-10

678. Valid Parenthesis String

12-31

921. Minimum Add to Make Parentheses Valid

11-22

301. Remove Invalid Parentheses

11-22

1249. Minimum Remove to Make Valid Parentheses

05-31

20. Valid Parentheses