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Data Structures and Algorithms

Homework 1

Files:

  • CS362 HW1.pdf – Assignment
  • Youssef_Amin_HW1.pdf – Written solutions and explanations
  • hw1.py – Python code implementing selected solutions

Topics covered:

  • Minimum-cost flow formulation using linear programming
  • Vendor optimization problem via constraint modeling
  • Local minima search using a binary-search variant
  • Shortest-path algorithms (Bellman–Ford, Dijkstra, Floyd–Warshall)
  • Tree detection using DFS and adjacency lists
  • Network-flow modeling for constrained assignment problems

Homework 2

Files:

  • Module_2__Advanced_Divide_and_Conquer.pdf – Assignment
  • Youssef_Amin_HW2.pdf – Full written solutions and explanations
  • hw2.py – Python implementations of all major problems

Topics covered:

  • Implementing a Stack with a BST – simulating LIFO behavior using an order-tracked Binary Search Tree
  • Combining Heaps – merging two min-heaps in linear time using bottom-up heapify
  • Merging Binary Search Trees – creating a unified in-order traversal in O(m + n) time
  • Linear-Time Selection with Groups of Six – proving Θ(n) complexity via recurrence expansion
  • Longest Increasing Subsequence – dynamic-programming reconstruction using predecessor tracking
  • Sorting by Permutation – constant-space in-place array reordering in O(n) time
  • Double Knapsack Problem – 3-D dynamic-programming approach for optimal dual-capacity allocation
  • Contained Interval Detection – sorting by start and negative endpoints to find nested intervals in O(n log n)

Language: Python 3
Libraries: None required beyond the standard library


Author

Youssef Amin
University of New Mexico
CS 362 – Fall 2025

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This repository contains my solutions to my data structures and algorithms homework

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