主要观点总结
本文是关于一场编程游戏，其中涉及两道题目。第一题是关于数论和编程知识，要求理解并运用数组操作。第二题是关于树的构造和博弈的问题，树的每个节点都有值0或1，两个女孩轮流改变节点的值以最大化或最小化树的得分。
关键观点总结
关键观点1: 理解数论题目的核心思想
该题目要求理解并运用数组操作，包括增加元素值和计算数组范围等。
关键观点2: 掌握树的构造和博弈策略
在树的构造过程中，需要理解节点值的含义以及如何计算树的得分。同时，还需要掌握博弈的策略，包括如何轮流改变节点的值以最大化或最小化得分。
关键观点3: 分析代码逻辑
文章给出了一段代码的实现过程，需要理解代码的逻辑和结构，包括如何处理输入数据、计算得分等。
文章预览
"学如逆水行舟，不进则退" 本文讲述比较一道数论题目，一道博弈论题目。 Codeforces Round 969 (Div. 2)C Dora has just learned the programming language C++! However, she has completely misunderstood the meaning of C++. She considers it as two kinds of adding operations on the array with elements. Dora has two integers and . In one operation, she can choose one of the following things to do. Choose an integer such that , and increase by . Choose an integer such that , and increase by . Note that and are constants , and they can be the same. Let's define a range of array as . For instance, the range of the array is , the range of the array is , and the range of the array is . After any number of operations (possibly, ), Dora calculates the range of the new array. You need to help Dora minimize this value, but since Dora loves exploring all by herself, you only need to tell her the minimized value. 首先，我们要清楚一
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