Solving Course Schedule using Topological sort.

Problem

Detect if courses can finish.

Pattern

This problem demonstrates the Topological sort pattern.

Approach

Kahn’s algorithm or DFS cycle detection.

Solution 

  // Solution for Course Schedule
// Pattern: Topological sort
// O(V+E) time

Complexity

O(V+E) time

Best Practices

  • Identify the pattern before coding — pattern recognition saves time
  • Handle edge cases: empty input, single element, duplicates
  • Use descriptive variable names even in timed interviews
  • Test with the provided examples plus one custom case