class Solution: def maxMoves(self, grid: List[List[int]]) -> int: ans = 0 def traverse(a, b, prevVal): nonlocal count, ans if (a, b) in visited: return visited.add((a, b)) ...
As a weekend project I thought of solving LinkedIn’s Queens game programmatically. (Well idea was to make it solve using ChatGPT, but too many un-knows and thought of solving using classic, vanilla backtracking) For those of you who haven't played (o...
Problem Write a program to solve a Sudoku puzzle by filling the empty cells. (link) A sudoku solution must satisfy all of the following rules: Each of the digits 1-9 must occur exactly once in each row. Each of the digits 1-9 must occur exactly onc...
Introduction Recursion When a function calls itself until a specified condition is met. f(){ print(1); f(); } Stack Space Base Case The condition that stops the recursion is called the base case. //cnt is a global variable f(){ if(...
class Solution: def combinationSum2(self, candidates: List[int], target: int) -> List[List[int]]: candidates.sort() N = len(candidates) ans = set() def checker(currentSum, nextIndex, nums): if currentS...
What is Data Structure? A data structure is a way of organizing data so that it can be used effectively and efficiently. From a code design perspective, we need to pay particular attention to the way data is structured. If data isn’t stored properly,...
1-Recursion-Basic #include "bits/stdc++.h" using namespace std; void solve(int n) { if(n==0) return; solve(n-1); cout<< n << " "; } int main() { ios::sync_with_stdio(false); cin.tie(NULL); int n; cin>>n; solve(n); ...
Backtracking is a powerful and often underrated technique in computer science. It's like a problem-solving Swiss Army knife that can help you find solutions to complex problems efficiently. In this blog, we'll explore what backtracking is, how it wor...
You are given a 2D grid representing a maze where: 'S' represents the starting point, 'E' represents the ending point, '0' represents open paths, and '1' represents walls. You need to find all possible paths from 'S' to 'E' using backtracking. ...
Explain the Problem Given an integer array nums that may contain duplicates, return all possible subsets (the power set). The solution set must not contain duplicate subsets. Return the solution in any order. Example: Input: nums = [1,2,2] Output: [ ...
