shortest path

Evaluate Division

Compute the results of division queries from given equations using graph traversal and depth-first search efficiently.

Network Delay Time

Find the minimum time for a signal to travel to all nodes in a directed graph or determine if it's impossible.

Cheapest Flights Within K Stops

Find the cheapest flight from a source to a destination with at most K stops using graph traversal techniques efficientl…

Reachable Nodes In Subdivided Graph

The Reachable Nodes In Subdivided Graph problem requires efficiently finding the reachable nodes using graph traversal a…

Find the City With the Smallest Number of Neighbors at a Threshold Distance

Find the city with the fewest neighbors within a given threshold distance using dynamic programming.

Minimum Cost to Make at Least One Valid Path in a Grid

Determine the minimum cost to create at least one valid path from the top-left to bottom-right in a directional grid.

Path with Maximum Probability

Find the path with the highest success probability in a graph from a start node to an end node, using edge probabilities…

Number of Restricted Paths From First to Last Node

Solve the problem of finding the number of restricted paths in a weighted undirected graph, leveraging graph algorithms …

Number of Ways to Arrive at Destination

Find the number of ways to travel from intersection 0 to n - 1 in the shortest time, using a graph-based approach.

Second Minimum Time to Reach Destination

Find the second minimum time to reach a destination using BFS while accounting for traffic signal delays in a graph trav…

Minimum Weighted Subgraph With the Required Paths

Find the minimum weighted subgraph that connects three specified nodes in a directed graph with constraints.

Minimum Obstacle Removal to Reach Corner

Find the minimum obstacles to remove in a 2D grid to reach the bottom-right corner using BFS graph traversal techniques.

Minimum Time to Visit a Cell In a Grid

Compute the fastest path in a grid where each cell has a minimum time requirement using BFS and priority queue technique…

Design Graph With Shortest Path Calculator

Implement a dynamic weighted directed graph with efficient shortest path queries and edge additions in real time.

Minimum Cost of a Path With Special Roads

Find the minimum cost path between two points, using special roads or direct moves in a 2D space.

Modify Graph Edge Weights

Modify Graph Edge Weights is a graph problem where you adjust edge weights to match a target shortest path distance.

Number of Possible Sets of Closing Branches

Calculate all valid sets of branch closures while keeping remaining branches within maxDistance using bitmask and graph …

Minimum Cost to Convert String I

This problem asks to calculate the minimum cost to convert a string from source to target using specific character trans…

Minimum Cost to Convert String II

Compute the minimum cost to transform source into target using substring replacements with given costs efficiently using…

Minimum Time to Visit Disappearing Nodes

Determine the minimum time to visit each node in a disappearing-node graph using arrays, graphs, and priority queues eff…

Find Edges in Shortest Paths

Use two Dijkstra runs to mark exactly which edges can appear on at least one shortest path from 0 to n - 1.

Find a Safe Walk Through a Grid

Determine if you can safely traverse a binary grid from top-left to bottom-right using limited health points.

Find Minimum Time to Reach Last Room I

Find Minimum Time to Reach Last Room I challenges you to determine the minimum time to travel in a dungeon with a grid l…

Find Minimum Time to Reach Last Room II

Calculate the minimum time to reach the last room in a grid with alternating move times using array and graph patterns.