How should I practice Robot Final Direction?

Start by reading the full statement, solve the visible examples, then compare the pattern against related TikTok online assessment problems in FastPrep.

Is Robot Final Direction associated with TikTok?

FastPrep tags this as a TikTok online assessment coding practice problem when the problem catalog has that company and stage context.

Robot Final Direction

TikTok● EasyFULLTIMEOA

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Problem statement

A robot starts at position 0 on a number line. Execute the characters of commands in order: L moves the robot one position left, and R moves it one position right.

Return "L" if the final position is left of the starting point, "R" if it is right of the starting point, or the empty string "" if the robot returns to its starting point.

For this exercise, assume the command string may be empty; an empty sequence leaves the robot at its starting point.

Function

finalRobotDirection(commands: String) → String

Examples

Example 1

commands = "LRR"return = "R"

The positions are -1, 0, and 1. The robot finishes to the right.

Example 2

commands = "RLL"return = "L"

The positions are 1, 0, and -1. The robot finishes to the left.

Example 3

commands = "LRRL"return = ""

There are two left moves and two right moves, so the final position is 0.

Constraints

For this exercise, assume 0 <= commands.length <= 10^5.
Every character of commands is L or R.