Problem You are given an array trees where trees[i] = [x i , y i ] represents the location of a tree in the garden. You are asked to fence the entire garden using the minimum length of rope as it is expensive. The garden is …
Problem You are given a string s consisting of lowercase English letters. A duplicate removal consists of choosing two adjacent and equal letters and removing them. We repeatedly make duplicate removals on s u…
Problem There is a grid of size 10^5 \times 10^5 1 0 5 × 1 0 5 , covered completely in railway tracks. Tom is riding in a train, currently in cell (a, b) ( a , b ) , and Jerry is tied up in a different cell (c, d) ( c , d ) ,…