摘要：题面:https://www.luogu.org/problem/P1196 阅读全文

摘要：题面:https://www.luogu.org/problemnew/show/P1955 cpp 本题可以把等于的并在一起,碰到不等于的就判断是否矛盾。由于数据比较大，注意要离散化。 Code: include include include include include include in 阅读全文

摘要：题面:https://www.luogu.org/problemnew/show/P1892 cpp 本题可以把朋友并在一起,用一个数组记录敌人,然后把敌人的敌人和自己并在一起即可。 Code: include include include include include include incl 阅读全文

摘要：```cpp // 初始化n个元素 void init(int n) { for(int i=0;i 阅读全文