two algorithm problems for USST Lenovo Vup
这是我为上海理工大学第二届“联想杯”全国程序设计邀请赛所出的两道算法题目的标程、测试数据、数据生成器、中英文题面和题解
你可以在牛客网找到这场比赛，2021-lenovo-solution.pdf 是这场比赛所有问题的题解
t1对应的是L题，一道有意思的矩阵快速幂，可惜在比赛中没什么人尝试着做，这道题在我看来比全局最小割简单多了
t2对应的是M题，本来打算作为一个拓扑排序签到，可惜被dfs回溯水过去了，也许可以考虑扩大字符集来卡掉所有的dfs
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