Optimus Agency | Professional Web Development

🧠

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

🧠

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

Strange Counter

solution.ts

Strange Counter

easy⏱ 15 mintypescriptchallengesproblem-solving-basic-

Exampleinput → output

Input

Output

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

Strange counter: starts at 3 at time 1, decrements each second. When it reaches 1, resets to 2×previous start value. Find value at time t.

Pattern: Cycle 1: times 1-3, values 3,2,1. Cycle 2: times 4-9, values 6,5,4,3,2,1. Cycle 3: times 10-21, values 12,11,...,1. For time t, find which cycle and calculate value.

Example: t=4 → Cycle 2, position 1 → Value = 6 - (4-4) = 6

Input format A single integer t.

Output format The counter value at time t.

Constraints 1 ≤ t ≤ 10¹²

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

Strange Counter

solution.ts

Strange Counter

easy⏱ 15 mintypescriptchallengesproblem-solving-basic-

Exampleinput → output

Input

Output

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

Strange counter: starts at 3 at time 1, decrements each second. When it reaches 1, resets to 2×previous start value. Find value at time t.

Pattern: Cycle 1: times 1-3, values 3,2,1. Cycle 2: times 4-9, values 6,5,4,3,2,1. Cycle 3: times 10-21, values 12,11,...,1. For time t, find which cycle and calculate value.

Example: t=4 → Cycle 2, position 1 → Value = 6 - (4-4) = 6

Input format A single integer t.

Output format The counter value at time t.

Constraints 1 ≤ t ≤ 10¹²

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