【Codeforces 851D Arpa and a list of numbers】 Arpa的数列要根据GCD变成好数列。 ·英文题,述大意: 给出一个长度为n(n<=5000000)的序列,其中的元素a[i]<=106,然后输入两个数x,y(x,y<=109)现在有两种操作:①支付x的代价删除一个数。②支付y的代价将一个数加1。题目要求支付最少的代价,使得原序列...
Arpa has found a list containingnnumbers. He calls a list bad if and only if it is not empty andgcd (see notes section for more information) of numbers in the list is1. Arpa can perform two types of operations: Choose a number and delete it with costx. Choose a number and increase ...
Codeforces 432 Div. 2-D-Arpa and a list of numbers(枚举倍数求GCD),题意:给你n个数,然后用两种操作使得这n个数的gcd不为1,每种操作有不同的成本,问你最小成本是多少操作1:将这个数删除(花费为x) 操作2:将这个数加一(可以一直加,每加一次花费为y)题解:昨晚
Choose a number and increase it by 1 with cost y. Arpa can apply these operations to as many numbers as he wishes, and he is allowed to apply the second operation arbitrarily many times on the same number. Help Arpa to find the minimum possible cost to make the list good. Input First...
First idea was to set MAGIC=12, this will pass all official test data, but there is counter-example. We can choose some prime P which is not in first 12 primes and put in array a numbers: P, 2P-1, 2P-1, 4P-1, 4P-1, 6P-1, 6P-1, ... and so on while numbers are less ...
Arpa and a list of numbers E. Arpa and a game with Mojtaba http://codeforces.com/contest/851/problem/D 一个错误的贪心方法水过了小数据,没想到还水过了终测(233...) 错误方法: 枚举一个2和倍数在原序列出现次数较多的素数 暴力求需要的花费 自己都能hack自己 301 100000 1 13 13*2-1 13*2-...
Mojtaba and Arpa are playing a game. They have a list ofnnumbers in the game. In a player's turn, he chooses a numberpk(wherepis a prime number andkis a positive integer) such thatpkdivides at least one number in the list. For each number in the list divisible bypk, call itx, th...
For phone numbers and lists of names by sites see the Current Directory of Network Participants. A. INITIAL DISTRIBUTION LIST Note: This list includes all Network Liaisons and others who should receive initial distribution of RFC's, whether sent from NIC or from sites. They will also receive ...
The irreversible component of qI results from photooxidative damage to the PSII reaction center that requires light-dependent protein synth- esis for repair, but now qI is also believed to include a regulated component not involving damage to PSII (Lambrev et al., 2010; Murchie and Niyogi, ...
定义bad list是一个非空的、最大公约数为1的序列。给定一个序列,有两种操作:花费x将一个元素删除、花费y将一个元素加1,问你将这个序列变为good list所需要的最小花费是多少。 【题解】 枚举gcd为i. 这里的枚举,并不是说确切这些数字的gcd就是i; ...