Math
LeetCode 150: Evaluate Reverse Polish Notation
·2 mins
LeetCode
Daily
Medium
Stack
Data-Structures
Expression-Evaluation
Math
Postfix-Notation
Reverse-Polish-Notation
Solving the Reverse Polish Notation evaluation problem using stack-based approach
LeetCode 1497: Check If Array Pairs Are Divisible by k (Remainder Pairing, Modulo)
·2 mins
LeetCode
Daily
Medium
Array
Hash-Map
Complement
Counting
Math
Modulo
Remainder pairing with a hash map; handle 0 and k/2 remainders carefully.
LeetCode 1071: Greatest Common Divisor of Strings
·2 mins
LeetCode
Daily
Easy
String
Gcd
Math
LeetCode Problem Solving