Expected die rolls to target
You repeatedly roll a fair k-sided die (faces 1..k) and accumulate the sum. You stop the moment the running total is >= target. Return the expected number of rolls, rounded to 6 decimal places. 1 <= k <= 20, 0 <= target <= 1000.
Implement
expected_rolls(k: int, target: int) → floatExamples
in
[6,1]out1What a strong answer looks like
State your approach and its time/space complexity out loud before you optimize. Handle the edge cases (empty input, duplicates, overflow), and say why you chose this over the brute force. Green tests are the floor, not the grade.
0:00 of about 30 min
solution.py
InputExpectedGot
[6,1]1not run yetsample