↓Skip to main content

Two Pointers

LeetCode 3439: Reschedule Meetings for Maximum Free Time (Sliding Window)
·3 mins
LeetCode Daily Medium Sliding Window Two Pointers Intervals Array
Sliding window over meetings; track total duration in a k-sized window and compute free span between boundaries.
LeetCode 30: Substring with Concatenation of All Words (Brute Force → Counting → Sliding Window)
·3 mins
LeetCode Daily Hard String Sliding Window Two Pointers Hash Map Frequency-Counter Brute-Force
Three approaches: brute force, counting optimization, and sliding window over word-length offsets.
LeetCode 209: Minimum Size Subarray Sum (Sliding Window)
·1 min
LeetCode Daily Medium Array Sliding Window Two Pointers Prefix Sum Binary-Search
Sliding window with two pointers; minimize subarray length where sum ≥ target.
LeetCode 1695: Maximum Erasure Value (Sliding Window)
·1 min
LeetCode Daily Medium Sliding Window Two Pointers Array Hashset
Sliding window with a set and running sum; two pointers to keep the subarray unique.
LeetCode 904: Fruit Into Baskets
·3 mins
LeetCode Daily Medium Sliding Window Hash Map Two Pointers Variable Window
LeetCode Problem Solving - Variable Size Sliding Window with Hash Map
LeetCode 76: Minimum Window Substring
·3 mins
LeetCode Daily Hard Sliding Window String Hash Map Two Pointers Variable Window
LeetCode Problem Solving - Variable Size Sliding Window with Character Counting
LeetCode 1004: Max Consecutive Ones III
·3 mins
LeetCode Daily Medium Sliding Window Array Two Pointers Binary Array
LeetCode Problem Solving - Variable Size Sliding Window with Zero Counting