QOJ #5439. Meet in the Middle 题解

QOJ #7324. Eulerian Orientation 题解

CF2062H Galaxy Generator 题解

CF2062G Permutation Factory 题解

CF1456E XOR-ranges 题解

CF2066F Curse 题解

[ABC310Ex] Negative Cost 题解

P8523 [IOI 2021] 位移寄存器 题解

CF2077G RGB Walking 题解

CF2077E Another Folding Strip 题解