Interview patterns, made visible

The interview patterns of data structures and algorithms, each one drawn, traced line by line in Python, and explained from brute force up. Free to read.

Patterns and reading

• Two pointers
• Sliding window
• Prefix sums and hashing
• Binary search, on index and on answer
• Tree DFS
• Complexity and amortized analysis
• What Python’s containers cost
• Recursion and the call stack
• How a hash table works
• The method
• The Python kit
• Templates
• Problem index