# Tricks for Competitive programming

## IO
- Use Scanner directly and parse input step by step
- Use `input!` macro for any arbitrary inputs (Codeforces, Codechef requires this)
- Or, use `Scanner` or `UnsafeScanner` for parsing input on demand

## dbg! macro
- `dbg!` is so handy, you can place it anywhere in the code, around a variable or even an expression, it outputs the value of expression to stderr. Great for debugging
- `dbg!`, when in doubt, pass the reference