This problem simulates smashing the two heaviest stones together repeatedly until at most one stone remains. The solution involves iteratively finding the two largest stones in the array, smashing the

Problem: Find customers who purchased all available products. Approach: Group customers by their ID and count the distinct products each bought. Compare this count with the total number of products in

Abstract The problem requires sorting all cells of a given matrix in ascending order of their Manhattan distances to the center point (rCenter, cCenter). The solution is to iterate through all cells,

Abstract: This problem requires determining whether each prefix of a binary array is divisible by 5. By progressively calculating the remainder modulo 5 of each prefix, the problem of excessively larg

This problem requires finding the smallest number composed only of digit '1' that is divisible by a given integer k. The solution leverages modular arithmetic to efficiently compute remainders without

Abstract:This paper explores the pyramid transformation matrix problem, which requires determining whether a complete pyramid can be constructed given a bottom block and allowed triangle pattern rules

Summary: The problem involves counting distinct phone numbers of length n where each digit transition follows the chess knight's move pattern on a phone pad. The solution uses dynamic programming (DP)

Abstract The problem asks to find a pair of attractions (i, j) in a given array of tourist attractions that maximizes the rating values[i] + values[j] + i - j. By splitting the formula into (values[i]

Summary: The problem involves a game where Alice and Bob take turns removing numbers from a chalkboard, with Alice starting first. A player loses if their move makes the XOR of all remaining numbers z

Summary: The problem models a Cat and Mouse game on an undirected graph where players alternate moves. The mouse starts at node 1, the cat at node 2, and the hole is at node 0. The game ends if the ca