↓Skip to main content

Two-Pointers

LeetCode 3439: Reschedule Meetings for Maximum Free Time (Sliding Window)
·3 mins
LeetCode Daily Medium Array Sliding-Window Two-Pointers Intervals
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 Brute-Force Frequency-Counting
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 Array Sliding-Window Two-Pointers Hash-Set
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 Variable-Window Two-Pointers Hash-Map
LeetCode Problem Solving - Variable Size Sliding Window with Hash Map
LeetCode 76: Minimum Window Substring
·3 mins
LeetCode Daily Hard String Sliding-Window Variable-Window Two-Pointers Hash-Map
LeetCode Problem Solving - Variable Size Sliding Window with Character Counting
LeetCode 1004: Max Consecutive Ones III
·3 mins
LeetCode Daily Medium Array Sliding-Window Two-Pointers Binary-Array
LeetCode Problem Solving - Variable Size Sliding Window with Zero Counting