Problem Description You are given a tree with N nodes which are numbered by integers 1..N. Eac ...
Problem Description Mex is a function on a set of integers, which is universally used for impartial game theorem. For a non negative integer set S, mex S is defined as the least non negative integer ...
2013-09-15 21:56 16 1218 推荐指数:
Problem Description You are given a tree with N nodes which are numbered by integers 1..N. Eac ...
Mex Time Limit: 15000/5000 MS (Java/Others) Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 623 Accepted Submission(s): 209 ...
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4747 题意:有一组序列a[i](1<=i<=N), 让你求所有的mex(l,r), mex(l,r)表示区间[l,r]中最小的未在序列中出现的非负整数。 思路:冥思苦想半天 ...
思路:分析知道sum(1,i) (1<=i<=n) 具有单调性。每次求出1-i之间的所有可能值, 注意每次增加一个数时对结果的影响,用mp数组维护下就可以!! 代码如下: ...
题意:一个长度为\(n\)的序列\(x\),\(m\)次操作,有两种,一种是对区间\([l,r]\)的数乘上\(w\),一种是询问\([l,r]\)的每个数的欧拉函数之和。 题解: ...
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https://codeforces.com/gym/101981 Problem A. Adrien and Austin 贪心,注意细节 f[x]=1:先手必赢。 f[x]: ...
é 题意: 题目给出一棵树,树上有一些结点是特殊点,问在这些特殊点之间的路径上(包括特殊点在内)一共 ...