C. Bear and String Distance time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Limak is a little polar bear. He likes nice strings - strings of length n, consisting of lowercase English letter…

F. Bear and Fair Set time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Limak is a grizzly bear. He is big and dreadful. You were chilling in the forest when you suddenly met him. It's very u…

E. Zbazi in Zeydabad time limit per test 5 seconds memory limit per test 512 megabytes input standard input output standard output A tourist wants to visit country Zeydabad for Zbazi (a local game in Zeydabad). The country Zeydabad is a rectangular t…

D. Magic Numbers time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Consider the decimal presentation of an integer. Let's call a number d-magic if digit d appears in decimal presentation of…

B. New Skateboard time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Max wants to buy a new skateboard. He has calculated the amount of money that is needed to buy a new skateboard. He left a…

A. Tennis Tournament time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output A tennis tournament with n participants is running. The participants are playing by an olympic system, so the winners mo…

C. Bear and String Distance 题目连接: http://www.codeforces.com/contest/628/problem/C Description Limak is a little polar bear. He likes nice strings - strings of length n, consisting of lowercase English letters only. The distance between two letters is…

CF 628C 题目大意:给定一个长度为n(n < 10^5)的只含小写字母的字符串,以及一个数d,定义字符的dis--dis(ch1, ch2)为两个字符之差, 两个串的dis为各个位置上字符的dis之和,求和给定的字符串的dis为d的字符串,若含有多个则输出任意一个,不存在输出-1 解题思路:简单贪心,按顺序往后,对每一个字符,将其变为与它dis最大的字符(a或者z),d再减去相应的dis, 一直减到d为0,剩余的字母则不变直接输出.若一直到最后一位d仍然大于0,则说明不存在,输出-1. /…

C. Bear and String Distance time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Limak is a little polar bear. He likes nice strings — strings of length n, consisting of lowercase English letter…

原题传送门 我承认,比赛的时候在C题上卡了好久(最后也不会),15min水掉D后(最后还FST了..),看到E时已经只剩15min了.尽管一眼看出是离散化+线段树的裸题,但是没有时间写,实在尴尬. 赛后先照习惯码出线段树,提交上去WA4???看了好久没看出问题,怎么调都不对.这时TJW忽悠我:"我写的可持久化线段树啊,不用离散化了啊."我信了,码出主席树(实话说确实不用想那么多了,无脑动态开点就行了),提交上去TLE18???回头一问TJW:"我FST了啊."我:(…