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"蔚来杯"2022牛客暑期多校训练营6 B题 Eezie and Pie 树上差分 链序
链接：https://ac.nowcoder.com/acm/contest/33191/B来源：牛客网 题目描述 Eezie, a pie maniac, would like to have some pies with her friends on a hot summer day. However, the weather is so hot that she can't go outdoors and has to call for