Fix: missing the 3rd condition for the question

ref: https://leetcode.com/problems/valid-parentheses/
wingkwong · Oct 10, 2023 · 16f9dfa · 16f9dfa
1 parent 6dfd7f6
commit 16f9dfa
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/tutorials/basic-topics/queue-and-stack.md b/tutorials/basic-topics/queue-and-stack.md
@@ -22,6 +22,7 @@ Stack is the data structure The first item that comes in will be the first to go
 >
 > 1. Open brackets must be closed by the same type of brackets.
 > 2. Open brackets must be closed in the correct order.
+> 3. Every close bracket has a corresponding open bracket of the same type.
 
 To validate a string of parentheses is valid, we must have a corresponding opening bracket when we see a closing bracket. Lets look at some examples:
 
@@ -224,4 +225,4 @@ export const suggestedProblems = [
   },
 ]
 
-<Table title="Suggested Problems" data={suggestedProblems} />
+<Table title="Suggested Problems" data={suggestedProblems} />