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Roman to Integer

easy⏱ 15 mintypescriptchallengesproblem-solving-basic-

LEARN BY DOINGPut your intuition to work3 steps

Roman to Integer

Choose one small test case. What result do you expect, and why?

Use the lesson’s examples and explanation to check your idea.

Personal reflection. Nothing is sent to an AI service.

Exampleinput → output

Input

MCMXCIV

Output

Sample case — your program reads stdin and prints to stdout.

Starter

Convert a Roman numeral string to an integer.

I=1, V=5, X=10, L=50, C=100, D=500, M=1000

If smaller value before larger, subtract (IV=4). Otherwise add.

Example: 'MCMXCIV' → 1994 (M=1000 + CM=900 + XC=90 + IV=4)

Input format A single line containing a Roman numeral string.

Output format The integer value.

Constraints 1 ≤ s.length ≤ 15, valid Roman numeral in range [1, 3999]

CodeDojo | Learn deeply. Build confidently.