Each pair bundles cell indices and distance from the closest '0'.Ĥ️⃣ **Seeding BFS:** Next, we loop through the grid, identifying '0' cells. 🚀 Here's a step-by-step guide to demystify the code:ġ️⃣ **Initialization:** We kick things off by defining 'n' and 'm' as the grid's rows and columns, respectively.Ģ️⃣ **Visualizing Vis:** The next step involves creating a 2D vector 'vis' of size 'n x m', acting as our GPS to track cell distances from the nearest '0'.ģ️⃣ **Queue Quest:** We introduce an empty queue 'q' that stores pairs. Hey LinkedIn crew! 👋 Let's unravel the magic behind a C++ implementation using Breadth-First Search (BFS) to conquer the "01 Matrix" challenge. 🔍 **Decoding BFS in C++: Navigating the "01 Matrix"** #leetcode #leetcode2023 #coding #share #logicalthinking #problemsolving #dsa If you want to try out ,the link to the problem is in the comments 💭. This is because the function uses a recursive call stack with a maximum depth of n, and each call to the function takes constant space.
#Leetcode permutations code#
✨Space Complexity: The space complexity of this code is O(n), where n is the size of the input vector nums. This is because there are n! permutations of a vector of size n, and the function generates each permutation by recursively swapping elements, taking O(n) time for each permutation. ✨Time Complexity: The time complexity of this code is O(n*n!), where n is the size of the input vector nums.
I hope this helps you understand how this code works! This generates all possible permutations by recursively swapping elements.
The function then iterates over all elements from index idx to the end of the vector, swapping the element at index i with the element at index idx, calling itself recursively with idx+1, and then swapping the elements back. The base case for the recursion is when idx is equal to the size of nums, in which case the current permutation of nums is added to ans. It takes as input the vector nums, the vector of vectors ans, and an index idx. The function getPermuation is a recursive helper function that generates the permutations. The function permute takes as input a vector of integers nums and returns a vector of vectors ans containing all the permutations of nums.
Here's a step-by-step explanation of the approach: Hey everyone Today I solved problem 46. Permutations on LeetCode using C++.
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