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Name things for the reader, not the writer.

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🧠

Name things for the reader, not the writer.

Tips & tricks

Open the command palette to jump anywhere
Browse blogs and courses by track
Try the live code playground

Language

Runs in the browser · readline() reads stdin

Explorer

Roman to Integer

solution.ts

Roman to Integer

easy⏱ 15 mintypescriptchallengesproblem-solving-basic-

Exampleinput → output

Input

MCMXCIV

Output

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

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]

Every problem you solve becomes a story you can tell in an interview.

Solving under pressure trains the muscle that's most tested in onsite rounds.
Explaining your approach out loud matters more than reaching the optimal solution.
Consistency wins: 1 challenge daily > 10 challenges on one Saturday a month.

Pro tip:After solving, write 2 lines on what you learned — that's what you'll remember in the interview.

mainIdle

solution.ts

🧠

Name things for the reader, not the writer.

Tips & tricks

Open the command palette to jump anywhere
Browse blogs and courses by track
Try the live code playground

Language

Runs in the browser · readline() reads stdin

Explorer

Roman to Integer

solution.ts

Roman to Integer

easy⏱ 15 mintypescriptchallengesproblem-solving-basic-

Exampleinput → output

Input

MCMXCIV

Output

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

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]

Every problem you solve becomes a story you can tell in an interview.

Solving under pressure trains the muscle that's most tested in onsite rounds.
Explaining your approach out loud matters more than reaching the optimal solution.
Consistency wins: 1 challenge daily > 10 challenges on one Saturday a month.

Pro tip:After solving, write 2 lines on what you learned — that's what you'll remember in the interview.

mainIdle

solution.ts

Optimus Agency | Professional Web Development