D. Generating Sets time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a set Y of n distinct positive integers y1, y2, ..., yn. Set X of n distinct positive integers x1, x2, ...,…

You are given a set Y of n distinct positive integers y1, y2, ..., yn. Set X of n distinct positive integers x1, x2, ..., xn is said to generate set Y if one can transform X to Y by applying some number of the following two operation to integers in X…

D. Generating Sets 题目连接: http://codeforces.com/contest/722/problem/D Description You are given a set Y of n distinct positive integers y1, y2, ..., yn. Set X of n distinct positive integers x1, x2, ..., xn is said to generate set Y if one can transfo…

D. Generating Sets time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a set Y of n distinct positive integers y1, y2, ..., yn. Set X of n distinct positive integers x1, x2, ...,…

H - Generating Sets Time Limit:2000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u Submit Status Description You are given a set Y of ndistinct positive integers y1, y2, ..., yn. Set X of ndistinct positive integers x1, x2, ..., xn is…

D. Generating Sets time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a set Y of n distinct positive integers y1, y2, ..., yn. Set X of n distinct positive integers x1, x2, ...,…

[codeforces722D]Generating Sets 试题描述 You are given a set Y of n distinct positive integers y1, y2, ..., yn. Set X of n distinct positive integers x1, x2, ..., xn is said to generate set Y if one can transform X to Y by applying some number of the fol…

Codeforce 722 D. Generating Sets 解析(思維) 今天我們來看看CF722D 題目連結 題目 略,請直接看原題 前言 真的是沒想到... @copyright petjelinux 版權所有 觀看更多正版原始文章請至petjelinux的blog 想法 觀察到,\(x\times2,x\times2+1\)這兩個運算反過來看就是把任一個數字除以\(2\)(因為整數型別會自動捨去小數點,所以整數型別的\(\frac{x}{2}=\lfloor\frac{x}{2}\r…

time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output You are given a set Y of n distinct positive integers y1, y2, -, yn. Set X of n distinct positive integers x1, x2, -, xn is said to generate set…

题目链接:http://codeforces.com/problemset/problem/486/D 题意: 给你一棵树,n个节点,每个节点的点权为a[i]. 问你有多少个连通子图,使得子图中的max(a[i]) - min(a[i]) <= d. ps.连通子图的定义: 如果一个点集V为一个连通子图,则对于任意两点a,b∈V,有a到b路径上的所有点u∈V. 题解: 因为要保证max(a[i]) - min(a[i]) <= d,所以可以人为地选出一个点rt作为点权最大的点. 这样在求以rt…