Easy

LeetCode 20: Valid Parentheses

LeetCode 496: Next Greater Element I

LeetCode 1071: Greatest Common Divisor of Strings

LeetCode 643: Maximum Average Subarray I

LeetCode 1550: Three Consecutive Odds

LeetCode 1399: Count Largest Group

LeetCode 2325: Decode the Message

LeetCode 724: Find Pivot Index

LeetCode 303: Range Sum Query - Immutable

LeetCode 1534: Count Good Triplets