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Pattern 3 of 15
Master the two pointers technique including fast-slow pointers, converging pointers, and expanding from center. Essential for array, string, and linked list problems in coding interviews.
7
105 min
Master Floyd's tortoise and hare algorithm for cycle detection. Detect cycles in linked lists and find duplicate numbers.
Learn converging two pointers for sorted arrays. Solve two sum, three sum, and container problems efficiently.
Master the expand from center technique for finding palindromic substrings and longest palindrome problems.
Learn to compare strings with backspace characters using two pointers from the end.
Master string reversal techniques including reverse string, reverse words, and reverse vowels using two pointers.
Learn in-place array modification using two pointers. Remove duplicates, move zeroes, and sort colors efficiently.
Master fixed separation two pointers to find nth node from end, middle of list, and similar problems.
Access theory, code examples, and practice problems.
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