纯属练习JAVA.... B. Om Nom and Spiders time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Om Nom really likes candies and doesn't like spiders as they frequently steal candies. One day Om Nom fan…

Om Nom and Spiders time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Om Nom really likes candies and doesn't like spiders as they frequently steal candies. One day Om Nom fancied a walk in a…

注意题目给的是一个nxm的park,设元素为aij,元素aij 有4种可能U(上移),D(下移),L(左移),R(右移) 假设第i行第j列元素aij(注意元素的索引是从0开始的) 当aij为D时,此时spiders一直往下移动不可能与Om Nom相遇 当aij为U时,此时spiders向上移动时此时Norm与spider初始位置之间距离是i+1,注意索引是从0开始的 如果i为偶数,i+1为奇数则两者必能在i/2位置相遇 如果i为奇数,当Norm在i/2,sprider在i/2+1,移动时,Nor…

B. Om Nom and Dark Park Time Limit: 1 Sec  Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/526/problem/B Description Om Nom is the main character of a game "Cut the Rope". He is a bright little monster who likes visiting friends living a…

Om Nom is the main character of a game "Cut the Rope". He is a bright little monster who likes visiting friends living at the other side of the park. However the dark old parks can scare even somebody as fearless as Om Nom, so he asks you to hel…

C. Om Nom and Candies 无线超大背包问题 #include <iostream> #include <cstdio> #include <cstring> #include <cmath> #include <algorithm> #include <string> #include <vector> #include <set> #include <map> #include…

B. Om Nom and Dark Park 在满二叉树上的某些边上添加一些值.使得根节点到叶子节点的路径上的权值和都相等.求最少需要添加多少. 我们利用性质解题.   考察兄弟节点.由于他们从跟节点到父节点这路径是相同的,所以需要添加的值为  2*max(lch,rch)-lch-rch;  同时将max(lch,rch)累加到父节点. 思路是最重要的.有时候不是聪不聪明的问题,而是会不会思考的问题. #include <iostream> #include <cstdio>…

ZeptoLab Code Rush 2015 D. Om Nom and Necklace [题意] 给出一个字符串s,判断其各个前缀是否是 ABABA…ABA的形式(A和B都可以为空,且A有Q+1个,B有Q个,Q给定). [官方题解] 对于前缀P,我们可以把它拆成P=SSSS…SSSST,其中T是S的前缀.显然可以用KMP算法,时间复杂度是O(n). 当T=S:P=SSS…S.假设S出现了R次.如果转换为ABABAB…ABABA的形式,A和B是由几个S组成,而且最后的A一定是P的一个后缀.由…

D. Om Nom and Necklace time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output One day Om Nom found a thread with n beads of different colors. He decided to cut the first several beads from this th…

C - Om Nom and Candies 思路:贪心+思维(或者叫数学).假设最大值max(wr,wb)为wr,当c/wr小于√c时,可以枚举r糖的数量(从0到c/wr),更新答案,复杂度√c:否则,假设hr/wr<hb/wr,得到hr*wb<hb*wr,由这个等式可知,在有wb*wr重量限制的情况下,买wb个r糖没有买wr个b糖划算,当需要买超过wb个r糖时,不如去买b糖,可以枚举r糖的数量(从0到wb-1),更新答案,复杂度√c. 代码: #include<bits/stdc++…