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CodeTutor - Coding Interview Preparation
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Showing 9 of 89 questions
Valid Palindrome II
Easy
Strings
Two Pointers
Two Pointers
★
LeetCode #680
Valid Palindrome
Easy
Strings
Two Pointers
Two Pointers
★
LeetCode #125
Valid Parentheses
Easy
Strings
Stack
Monotonic Stack
★
LeetCode #20
Valid Parenthesis String
Medium
Strings
Stack
Dynamic Programming
Greedy
★
Dynamic Programming
LeetCode #678
Verifying an Alien Dictionary
Easy
Arrays
Hash Tables
Strings
Two Pointers
★
LeetCode #953
Word Break II
Hard
Strings
Hash Tables
Dynamic Programming
Backtracking
Dynamic Programming
★
LeetCode #140
Word Break
Medium
Dynamic Programming
Hash Tables
Strings
Dynamic Programming
★
LeetCode #139
Word Ladder
Hard
Strings
Hash Tables
Graphs
BFS (Breadth-First Search)
★
LeetCode #127
Word Search II
Hard
Arrays
Recursion
Strings
Trie
★
Backtracking
Matrix Traversal
LeetCode #212
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