Car Fleet, solved two ways

Try:
CALL
1 / 1

Code

The highlighted line runs next. The pill shows the live values in the running call.

Cost

Work done so far, and how the two solutions compare

The highway

Number on each car = its speed; colour = its fleet

Keyboard: ← → step, Space play or pause. target 1–100, up to 8 cars with different positions (0 ≤ position < target) and speeds 1–20. A car that reaches its leader exactly at the target still counts as part of that fleet, which is why the test is ≤, not <.