A. Strange Addition time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Unfortunately, Vasya can only sum pairs of integers (a, b), such that for any decimal place at least one number has digi…

题目链接:http://codeforces.com/problemset/problem/305/A 题目意思:给出一个序列,需要从中选择一些数,这些数需要满足:任意的两个数中每一位至少有一个数满足该位有0.例如,406, 10(可以看成010)是符合条件的: 406, 11 就不符合条件,因为个位上这两个数都不包含0. 一开始想得太过复杂:把整型的数保存到字符数组中,再用strstr函数找出是否有0的存在,但是这样做根本不能解决问题,因为不能得出0的具体位置.并且不能判断出两个数中的不同位至…

http://codeforces.com/problemset/problem/305/A 这题就是意思没看懂,一开始以为只要个位数只要一个为0就能相加,没想到到CF里面提交第三组就过不了,才发现是要各个位上面都要有一个为0的时候才能相加. 题意很重要.... AC代码: #include<iostream> #include<cstdio> #include<algorithm> using namespace std; int main() { int k,i,j…

\(\mathcal{Description}\)   Link.   定义两个数在进行加法时,进位单独作为一位.例如: .   给定一个 \(n\) 为数和 \(m\) 次修改操作,每次修改会修改 \(n\) 位数的某一位数字.在每次修改后求出有多少对数以上述规则相加后的得数为这个 \(n\) 为数.   \(n,m\le5 \times 10^5\). \(\mathcal{Solution}\)   显然的 DDP.   令 \(f_i\) 表示加和为目标数后 \(i\) 为数字的数对数量…

Strange Addition CodeForces - 305A Unfortunately, Vasya can only sum pairs of integers (a, b), such that for any decimal place at least one number has digit 0 in this place. For example, Vasya can sum numbers 505 and 50, but he cannot sum 1 and 4. Va…

A. Strange Addition (目前的做法好像做烦了) 统计数的\(mask\),表示个.十.百位上是否是0,共8种数. 枚举8种数组成的所有情况\(2^8\),记录最大数量. B. Continued Fractions 大数.分数运算. C. Ivan and Powers of Two \(map\)模拟即可. D. Olya and Graph \(i\)和\(i+1\)必然连边. \(i\)要连第二条边的话,只能连向\(i+k+1\),并且对于\(j\ge i+k+1\)不能…

Assume you have an array of length n initialized with all 0's and are given k update operations. Each operation is represented as a triplet: [startIndex, endIndex, inc] which increments each element of subarray A[startIndex ... endIndex] (startIndex…

今天使用SVN提交项目时,出现了这样的提示:"XXX" is scheduled for addition, but is missing.(无关紧要的东西用XXX代替). 看报错说明是这样的:"XXX"已经被列为添加状态,但我们提交时却缺少"XXX"这个. 原因是:之前用SVN提交过的文件/文件夹,被标记为"addition"状态,等待被加入到仓库.虽然你把这个文件删除了,SVN提交的时候还是会尝试提交这个文件,所以就会提示…

1.题目描述: 1175. Strange Sequence Time limit: 1.0 secondMemory limit: 2 MB You have been asked to discover some important properties of one strange sequences set. Each sequence of the parameterized set is given by a recurrent formula: Xn+1 = F(Xn-1, Xn)…

C. Efim and Strange Grade time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Efim just received his grade for the last test. He studies in a special school and his grade can be equal to any po…