An array is squareful if the sum of every pair of adjacent elements is a perfect square. Given an integer array nums, return the number of permutations of nums that are squareful. Two permutations perm1 and perm2 are different if there is some index i such that perm1[i] != perm2[i].

🧩 Rush01 (42 Paris Piscine) — Sub-millisecond Skyscrapers puzzle solver in C, built with a custom backtracking core and a handcrafted constraint propagation engine.

🚀 Data Structures & Algorithms (DSA) concepts: 🔍 Complexity analysis 🧩 Problem-solving techniques 🖥️ Programming paradigms

Generador eficiente de Sudoku 9x9 en C usando método híbrido (Fisher-Yates + Backtracking)

Logic puzzle solver implementing constraint satisfaction algorithms - 42 School algorithmic thinking project with backtracking and optimization

A C program that solves 9x9 Sudoku puzzles using a recursive backtracking algorithm.

Tracking my progress on 70 essential LeetCode DSA problems — organized by topic with code, solutions, and pattern-based learning.

C++ Sudoku solver, checker, and generator using backtracking and recursion, with modular design, constraint handling, and puzzle generation.

A C-based command-line solver for the 4x4 Skyscrapers puzzle, which finds grid solutions based on visibility clues and unique building heights in each row and column.

This is a simple yet powerful Sudoku Solver implemented in C using backtracking. The program takes an incomplete 9x9 Sudoku puzzle as input (with 0 representing blank cells) and fills it with a valid solution if one exists.

Design and Analysis of Algorithms using C

A terminal-based C program to generate and solve Sudoku puzzles with customizable difficulty using backtracking algorithm.

Sudoku Solver using Bitmasking + Backtracking and Dancing Links in C

Programming labs on recursion, backtracking, combinatorics, greedy algorithms, dynamic programming, and graph algorithms.

DSA using C

Repo to save my practice code for my semester exams

This code solves the skyscraper puzzle using a backtracking algorithm

Homeworks from the course Data Structures and Algorithms (IIC2133) in Pontificia Universidad Catlica de Chile.

A "playground" of backtracking programs

A recursive backtracking solution for the Peg Solitaire puzzle that simulates moves on a 7x7 board, aiming to achieve a single remaining piece in the center after 31 moves.