cf448D Multiplication Table】的更多相关文章

目录 题目 思路 \(Code\) 题目 CF448D Multiplication Table 思路 二分答案.这个矩阵的每一排都是递增的,所以二分\(ans\),去计算有多少个数等于\(ans\),有多少个数小于\(ans\),如果小于\(ans\)的数不多于\(k-1\)个并且小于等于\(ans\)的数不少于\(k\)个,那么当前\(ans\)就是答案. Q:如何计算小于\(ans\)的数的个数? A: \[\sum_{i=1}^{n}min(\lfloor \frac{ans-1}{i}…
D. Multiplication Table time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Bizon the Champion isn't just charming, he also is very smart. While some of us were learning the multiplication tabl…
题目:http://codeforces.com/problemset/problem/448/D 题意:给出n,m,k,即在一个n*m的二维数组中找第k大的数,第i行第j列的数的值为i*j. 思路:二分答案,每一行中找比它小的数之和(单调函数),作为check的条件来转移. #include<bits/stdc++.h> using namespace std; int n,m; long long k; bool check(long long mid) { ; ;i<=n;i++)…
http://acm.hdu.edu.cn/showproblem.php?pid=4951 2014多校 第八题 1008 2014 Multi-University Training Contest 8 Multiplication table Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 438    Accepted Submi…
A. Multiplication Table Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/577/problem/A Description Let's consider a table consisting of n rows and n columns. The cell located at the intersection of i-th row and j-th column co…
转载请注明出处:viewmode=contents" target="_blank">http://blog.csdn.net/u012860063?viewmode=contents 题目链接:http://codeforces.com/contest/448/problem/D -----------------------------------------------------------------------------------------------…
 D. Multiplication Table time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Bizon the Champion isn't just charming, he also is very smart. While some of us were learning the multiplication t…
二分法判断答案 D. Multiplication Table time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Bizon the Champion isn't just charming, he also is very smart. While some of us were learning the multiplicat…
题目链接:D. Multiplication Table 题意: 给出N×M的乘法矩阵要你求在这个惩罚矩阵中第k个小的元素(1 ≤ n, m ≤ 5·10^5; 1 ≤ k ≤ n·m). 题解: n和m最大都是5e5那矩阵最大就有2e11不能够暴力,其实这里就应该想到要用二分做的,但是我做题的时候脑抽@.@想要推规律,然后就决决了.那么讲一下二分怎么做,就先简单的二分答案在(1-n*m)中二分,然后cheak函数中找所有矩阵中比所给值小的元素,个数大于等于k为成立条件.复杂度(O(n*log(…
Nearly every one have used the Multiplication Table. But could you find out the k-th smallest number quickly from the multiplication table? Given the height m and the length n of a m * n Multiplication Table, and a positive integer k, you need to ret…