Convert Infix to Postfix (Shunting-yard algorithm).

Updated Apr 28, 2026

Short answer

Use a stack to store operators based on precedence rules.

Deep explanation

Intermediate stack problems often involve monotonic properties or expression conversion. Use a stack to store operators based on precedence rules.

Real-world example

Compiler syntax checking for code blocks.

Common mistakes

Using a single variable for min-tracking instead of a stack (fails when min is popped).

Follow-up questions

Time complexity of sorting a stack?

More Stacks interview questions