原文链接https://vjudge.net/contest/331993#problem/H Alice and Bob decide to play a funny game. At the beginning of the game they pick n(1 <= n <= 10 6) coins in a circle, as Figure 1 shows. A move consists in removing one or two adjacent coins, leaving

PJ考试可能会用到的数学思维题选讲 by Pleiades_Antares 是学弟学妹的讲义--然后一部分题目是我弄的一部分来源于洛谷用户@ 普及组的一些数学思维题,所以可能有点菜咯别怪我 OI中的数学题--你会你就能做,不会做就是真的做不出来QAQ 鲁迅曾说:一入数学深似海,从此AC是路人. 一些会说到的题目:(都是洛谷编号) 这些题目全都是原来NOIP考过的真题喔 1010 1014 1029 1035 1045 1075 1012 1351 2119 ok咱们开始说 第一题,洛谷P1010

Squats Time Limit: 1000MS   Memory Limit: 262144KB   64bit IO Format: %I64d & %I64u Submit Status Description Pasha has many hamsters and he makes them work out. Today, n hamsters (n is even) came to work out. The hamsters lined up and each hamster e

1003 阶乘后面0的数量 基准时间限制:1 秒 空间限制:131072 KB 分值: 5         难度:1级算法题 n的阶乘后面有多少个0? 6的阶乘 = 1*2*3*4*5*6 = 720,720后面有1个0.   Input 一个数N(1 <= N <= 10^9) Output 输出0的数量 Input示例 5 Output示例 1题目链接:http://www.51nod.com/onlineJudge/questionCode.html#!problemId=1003编程之

Vova has won nn trophies in different competitions. Each trophy is either golden or silver. The trophies are arranged in a row. The beauty of the arrangement is the length of the longest subsegment consisting of golden trophies. Vova wants to swap tw

题目:传送门.(需要下载PDF) 题意:t组数据,每组数据给定一个数ni(1 ≤ ni ≤ 10^18),把ni拆成尽可能多的数,要求每个数的素因子只包含2和3,且这些数不能被彼此整除,输出一共能拆成多少个数,并输出这些数. 题解:根据题意ni = 2^a0*3^b0*+2^a1*3^b1+........+2^ax*3^bx,所以我们按照ai升序,bi降序的顺序求出每一个加数,这样会保证这些数不能被彼此整除.首先打表得知3^40会超过long long,3^39不会,先打出3^39的表存到数组

Crash Time Limit: 1000MS   Memory Limit: 262144KB   64bit IO Format: %I64d & %I64u Submit Status Description During the "Russian Code Cup" programming competition, the testing system stores all sent solutions for each participant. We know th

Elimination Time Limit: 1000MS   Memory Limit: 262144KB   64bit IO Format: %I64d & %I64u Submit Status Description The finalists of the "Russian Code Cup" competition in 2214 will be the participants who win in one of the elimination rounds.

Solution 我又双叒叕去看题解啦$QAQ$, 真的想不到鸭 输入 $a$ 和 $n$ 互质, 所以满足 $a \times i \ mod \ n$ $(0<=i<n)$ 肯定是不重复的 根据这一个性质 , 设 满足条件的子串的开头位置为 $s$ 先不考虑$01$, 仅考虑开头位置上的值 $a*s+b$, 设它为$x$, 则它接下来第 $i$ 位的值为 $x+(i-1)*a$ 若那个位置上的字符为 $0$, 则 $0<=x+(i-1)*a<p$, 反之 $p<=x+(i

题目描述 给定n,a,b,p,其中n,a互质.定义一个长度为n的01串c[0..n-1],其中c[i]==0当且仅当(ai+b) mod n < p.给定一个长为m的小01串,求出小串在大串中出现了几次. 输入 第一行包含整数n,a,b,p,m(2<=n<=10^9,1<=p,a,b,m<n,1<=m<=10^6).n和a互质.第二行一个长度为m的01串. 输出 一个整数,表示小串在大串中出现了几次 样例输入 9 5 6 4 3 101 样例输出 3 提示 假设我

传送门:Problem B https://www.cnblogs.com/violet-acmer/p/9739115.html 题意: 找到最小的包含子序列a的序列s,并且序列s是 p -莫干山序列. 题解: 很容易想到 p = max_ai+1,并且a[1]对应着s[1],不然需要在a[1]前加其他数来使的a[1]->某s[i],肯定比不加的序列要长. 遍历a[ ] 数组,分三种情况讨论 ①a[i] > a[i-1] 此种情况下,a[i-1]--a[i]在s中是连续的一段序列,res +

传送门:Problem A https://www.cnblogs.com/violet-acmer/p/9739115.html 题意: 能否通过横着排或竖着排将 1x p 的小姐姐填满 n x m 的区域内. 题解: 只有当 n*m%p == 0 时才有可能填满,又注意到 p 为质数,故如果 n*m%p == 0, 则 n,m只少有一个是 p 的整倍数. 分两种情况: (1)n*m%p != 0 ,输出 No. (2)n*m%p == 0 ①如果 n%p == 0,可以将 n 分成 n/p

题目链接: http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=2818 题目描述: Given positive integers B and N, find an integer A such that AN is as close as possible to B. (The result A is an approximation to the Nth root of B.) Note that AN may be l

Problem Description Professor Zhang has a number sequence a1,a2,...,an. However, the sequence is not complete and some elements are missing. Fortunately, Professor Zhang remembers some properties of the sequence: 1. For every i∈{1,2,...,n}, 0≤ai≤100.

https://www.hackerrank.com/contests/world-codesprint-6/challenges/bonetrousle 给定一个数n,和k个数,1--k这k个,要求选择b个数,使得这b个数的和等于n. 首先考虑最小值,在1--k中选择前b个数,是最小的,记为mi.最大值,后b个数相加,记为mx 注意到一个东西:如果mi <= n <= mx.那么是绝对可行的.因为mi总能增加1(同时保证满足要求),所以在这个区间里面的,都是可行解. 所以首先从mi开始枚举,

B. Sonya and Exhibition time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Sonya decided to organize an exhibition of flowers. Since the girl likes only roses and lilies, she decided that only

过程很美妙啊 Problem Description Rikka is a high school girl suffering seriously from Chūnibyō (the age of fourteen would either act like a know-it-all adult, or thinks they have special powers no one else has. You might google it for detailed explanation)

http://acm.zju.edu.cn/onlinejudge/showContestProblem.do?problemId=5564   根据它的定义是行最小,列最大. 可以证明鞍点是唯一的. 单独考虑每一个元素的贡献,它能成为鞍点的情况有: 1.在这一行中,<= a[i][j]的元素肯定要删除,那么剩下k1个大于他a[i][j]的,当然a[i][j]本身不能删除 2.在这一列中,>= a[i][j]的元素肯定要删除,那么剩下k2个小于a[i][j]的,当然a[i][j]本身不能删除

/* 参看博客地址:http://blog.csdn.net/oceanlight/article/details/7857713 重点是取完最优的后剩余的rest=n%lcm+lcm;中性价比小的数目num<lcm/性价比小的体积,因为如果大于的话 肯定可以由性价比好的替换. 然后枚举.从体积大的开始枚举次数少. 注意64位 */ #include<stdio.h> #include<string.h> #include<stdlib.h> #define ll

Online Judge:Luogu,Codeforces Round #592 (Div. 2) C Label:数学,思维题, 枚举 题目描述 某球队一共打了\(n\)场比赛,总得分为\(p\),已知赢一场得\(w\)分,平局一场得\(d\)分,输一场不加分也不减分,问一共赢了几场(x),平局了几场(y),输了几场(z)?如果不存在合法方案输出"-1",如果存在多组可能的方案,任意输出一组(Special Judge). 也就是任求一组符合条件的非负整数三元组\((x,y,z)\)

http://codeforces.com/problemset/problem/1009/B B. Minimum Ternary String time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given a ternary string (it is a string which consists only