Root of the Problem Time Limit: 2 Seconds      Memory Limit: 65536 KB 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 less than…

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…

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…

UVa10025 ? 1 ? 2 ? ... ? n = k problem The problem Given the following formula, one can set operators '+' or '-' instead of each '?', in order to obtain a given k? 1 ? 2 ? ... ? n = k For example: to obtain k = 12 , the expression to be used will be:…

题目链接: POJ:id=3100" style="font-size:18px">http://poj.org/problem? id=3100 ZOJ:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=1818 HDU:pid=2740">http://acm.hdu.edu.cn/showproblem.php?pid=2740 Description Given positive…

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…

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…

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.…

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)…