Solving the Watchcow Patrol Problem with Eulerian Circuit
Problem Statement
Farmer John has N farms (2 ≤ N ≤ 10^4) connected by M roads (1 ≤ M ≤ 5×10^4). Multiple roads between the same pair of farms are allowed.
Bassie starts patrolling from farm 1. Every road must be traversed exactly once in each direction, and the path must end back at farm 1.
Output any valid sequence of farms that satisfies the ...
Posted on Tue, 07 Jul 2026 16:41:18 +0000 by tha_mink
Optimized Approaches for Binary Search Tree Diff Calculations and Tree Ancestry Queries
Minimal Absolute Difference in BST
Since an in-order traversal of a binary search tree produces a sorted sequence, the smallest absolute difference between any two nodes corresponds to the minimal gap between adjacent elements in this sequence. The strategy involves tracking the previously visited node and comparing its value with the current n ...
Posted on Sat, 09 May 2026 16:35:48 +0000 by hemoglobina