}constintN =1007;intn;inta[N];intf[N][N];inlineintConst(intx,inty){returnmax(a[x], a[y]); }intmain(){ n =read();for(inti=1;i<=n;++i) a[i] =read();memset(f,0x3f,sizeof(f)); f[1][1] =max(a[2],a[3]); f[1][2] =max(a[1],a[3]); f[1][3] =max(...
Codeforces 977D. Divide by three, multiply by two Divide by three, multiply by two Polycarp likes to play with numbers. He takes some integer number x, writes it down on the board, and then performs with it n−1 operations of the two kinds: divide the number x by 3 (x must be ...
题目地址:http://codeforces.com/contest/977/problem/D 官方题解: 题解:按数有多少3的因子排序,如果相同就按从小到大排序。 提示:dfs and similar //math //sortings 1#include<cstdio>2#include<cmath>3#include<algorithm>4#include<cstring>5#include<string>6#include<iostream>7#include8#include<vecto...
We will prove this by this idea: For every pair of points on the same side (upper/lower) of the hull, there exists a way to find a line containing the leftmost/rightmost point and one point from the original pair, with the length longer than the original. We have three cases based o...
To become the king of Codeforces, Kuroni has to solve the following problem. 风骨散人Chiam 2020/10/28 2580 CF思维联系– Codeforces-987C - Three displays ( 动态规划) 对象存储 ACM思维题训练集合 It is the middle of 2018 and Maria Stepanovna, who lives outside Krasnokamensk (a town in Zab...
Divide by three, multiply by two Description Polycarp likes to play with numbers. He takes some integer number xxx, writes it down on the board, and then performs with it n−1n - 1n−1 operations of the two kinds: divide the number xxx by 333 (xxx must be divisible by 333); ...
【Codeforces - 977D】Divide by three, multiply by two(思维构造),题干:Polycarplikestoplaywithnumbers.Hetakessomeintegernumberxx,writesitd
Codeforces Round #479 (Div. 3) D. Divide by three, multiply by two (DFS) 题意:给你一个长度为nn的序列aa.对它重新排列,使得ai+1=ai/3ai+1=ai/3或ai+1=2∗aiai+1=2∗ai.输出重新排列后的序列. 题解:经典DFS,遍历这个序列,对每个数dfs,每次dfs使len+1len+1,当len=nlen=n时,说明这个...
D. Divide by three, multiply by two •题意 给你一个数 x,x 可以执行以下两种操作中的一种得到数 y: y 再执行上述两种操作的一种得到数 z; 接着对 z 得到... 这样依次执行了 n-1 次会得到 n 个数; 现在给你这 n 个数,让你按照上述规则给这 n 个数排序,使得其满足 a1=x...
CodeForces - 977D D. Divide by three, multiply by two dfs路径打印,D.Dividebythree,multiplybytwotimelimitpertest1secondmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputPolycarplikestoplaywithnumbers.Hetakessomeintege