Integer to Roman

Greedy subtraction from symbol table.

strings greedy

Implement `to_roman(n: int) -> str`.

Use standard subtractive notation (IV = 4, IX = 9, etc.).

Constraints

1 ≤ n ≤ 3999

Example

>>> to_roman(1994)
"MCMXCIV"

22 points ~22 min

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Hints

Build a list of (value, symbol) pairs in descending order; greedily subtract.

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