Algorithm Practice
Solve LeetCode-style puzzles with arrays, strings, and dynamic programming.
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ArraysAlgorithms
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Level
LeetCode 121: Best Time to Buy and Sell Stock
Find the maximum profit from buying and selling a stock once.
ArraysDynamic Programming
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Level
LeetCode 20: Valid Parentheses
Determine if the input string has valid parentheses ordering.
StringsStacks
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Level
LeetCode 3: Longest Substring Without Repeating Characters
Find the length of the longest substring without repeating characters.
StringsAlgorithms
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Level
LeetCode 53: Maximum Subarray
Find the contiguous subarray with the largest sum.
ArraysDynamic Programming
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Level
LeetCode 70: Climbing Stairs
Calculate the number of ways to climb n stairs, taking 1 or 2 steps at a time.
Dynamic Programming
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