Stack Queue Problems

2 problems in this category

Stack Monotonic Stack

Valid Parentheses

Determine if the input string of brackets is valid.

Easy LeetCode
Time: O(n)
Space: O(n)
Example: "()[]{}" → true
Stack
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Daily Temperatures

For each day, return the number of days to wait for a warmer temperature.

Medium LeetCode
Time: O(n)
Space: O(n)
Example: [73,74,75,71,69,72,76,73] → [1,1,4,2,1,1,0,0]
Stack Monotonic Stack
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