Neetcode questions:

Two Pointers

problem	code	solution	my notes
🟢 Valid Palindrome	php
🟡 Two Sum II - Input Array Is Sorted	go
🟡 3Sum	go
🟡 Container With Most Water
🔴 Trapping Rain Water

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Leetcode questions:

Two Pointers

problem	code	solution	my notes
🟢 Move Zeroes	go	slow and fast pointers
🟢 Is Subsequence	python	slow and fast pointers
🟡 Container With Most Water	go	start and end pointers	⭐⭐⭐ creative solution and beautiful proof
🟡 Max Number of K-Sum Pairs	go	start and end pointer	like “two sum” problem

Sliding Window

problem	code	solution	my notes
🟢 Maximum Average Subarray I	go
🟡 1456-Maximum Number of Vowels in a Substring of Given Length	python
🟡 Max Consecutive Ones III	go
🟡 Longest Subarray of 1’s After Deleting One Element	go		very similar to “Max Consecutive Ones III” problem

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notes:

string manipulations:

package main

import "unicode"

func main() {
	unicode.ToLower('A')  // a
	unicode.IsLetter('$') // false
	unicode.IsDigit('w')  // false
}

'#'.isalnum()
'B'.lower()