摘要:
题目传送门 棘手的操作 题目描述 有N个节点,标号从1到N,这N个节点一开始相互不连通。第i个节点的初始权值为a[i],接下来有如下一些操作: U x y: 加一条边,连接第x个节点和第y个节点 A1 x v: 将第x个节点的权值增加v A2 x v: 将第x个节点所在的连通块的所有节点的权值都增加 阅读全文
摘要:
题目传送门 逃跑的Barn 题目描述 It's milking time at Farmer John's farm, but the cows have all run away! Farmer John needs to round them all up, and needs your hel 阅读全文