Find lexicographically smallest string and elimination order

You remember two coding questions from an online assessment.

Question 1: Return the lexicographically smallest string after a prefix/suffix reverse

You are given a string s (length n). You may perform at most one operation:

1. Choose an integer k where 1 <= k <= n.
2. Either:
   • Reverse the first k characters of s (reverse a prefix of length k), leaving the rest unchanged, or
   • Reverse the last k characters of s (reverse a suffix of length k), leaving the rest unchanged.

Return the lexicographically (alphabetically) smallest string that can be obtained among:

• doing no operation, and
• doing one valid operation as above.

Output: the smallest resulting string.

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Question 2: Simulate race eliminations using drivers’ history across laps

You are given laps, an array of length n representing a multi-lap race.

• Each laps[i] is an array of pairs [driverName, lapTime].
• lapTime is a positive integer.
• A driver may appear in earlier laps and then be eliminated; eliminated drivers no longer appear in subsequent laps.

Maintain each driver’s history so far using cumulative total time across all completed laps. After each lap is processed:

1. Update each active driver’s cumulative time by adding their time from this lap.
2. Eliminate the slowest active driver, defined as the driver with the largest cumulative total time so far.
   • If there is a tie, break ties by driverName in ascending lexicographic order.

Return the elimination order as an array of driver names, from first eliminated to last eliminated.

Output: string[] elimination order.

Notes / assumptions to make the task well-defined:

• Each lap input includes exactly one entry for each currently-active (not-yet-eliminated) driver.
• There is at least 2 drivers at the start.
• Exactly 1 driver is eliminated after each lap until 1 remains (so total eliminations = initialDrivers - 1).