1. The Pattern-First Approach to LeetCode
Blindly grinding hundreds of random LeetCode questions leads to burnout. Top candidates master algorithmic patterns that solve 90%+ of coding round variations.
2. The 5 Most Frequently Asked Patterns
1. Sliding Window (O(N) Time, O(K) Space)
Identified by: Finding the longest/shortest subarray, substring, or contiguous window satisfying a condition (e.g. "Longest Substring Without Repeating Characters").
Template: Expand right pointer while condition holds; shrink left pointer when constraint is violated.
2. Two Pointers (Converging & Diverging)
Identified by: Sorted arrays, palindrome verification, or pair sum targets (e.g. "Two Sum II", "3Sum", "Trapping Rain Water").
3. Monotonic Stack (O(N) Time)
Identified by: Finding the "next greater element", "previous smaller element", or histogram boundaries (e.g. "Largest Rectangle in Histogram", "Daily Temperatures").
4. Fast & Slow Pointers (Floyd's Cycle Detection)
Identified by: Linked list cycle detection, finding list middle in 1 pass, or cycle starting nodes.
5. 0/1 Knapsack & Longest Increasing Subsequence (DP)
Identified by: Optimization choices where picking item i depends on remaining capacity/state from i-1.
3. Format Your Coding Achievements on Your Resume
Showcase your LeetCode ratings and project implementations using Google's X-Y-Z formula on Vaylo AI Resume Builder.