NWERC 2025, Problem B: Bisecting Bargain
Original author: Wendy Yi, Michael Zündorf
Source: https://2025.nwerc.eu
Original English problem starts on PDF page 5.
License: Creative Commons Attribution-ShareAlike 4.0 International
https://creativecommons.org/licenses/by-sa/4.0/
Changes: Chinese statement and title; practice problem label; explicit memory limit of 1024 MiB.
Official test inputs, answers, output validators and validator flags are preserved.