But, this solution seems too slow when n<=109n<=109. Is there a better solution for this problem ? +3 TuHoangAnh 2 years ago 4 Comments (3) Show archived | Write comment? TuHoangAnh 2 years ago, # | 0 Auto comment: topic has been updated by TuHoangAnh (previous revision,...
vaaven→Codeforces Round 953 (Div. 2) Arif_NCS13→Need Advice How i can be master on codeforces Kageyama_29→Can someone help me with this problem - E(Div-2 Latest) comingsoon.cpp→Is this problem really a 1600 problem Moody_in_a_hoodie→Python can't handle deep recursion even after ...
1 /** 2 * hdu 3 * Problem#5382 4 * Accepted 5 * Time: 655ms 6 * Memory: 33992k 7 */ 8 #include <algorithm> 9 #include <iostream> 10 #include <cstdlib> 11 #include <cstdio> 12 #include <vector> 13 #include <ctime> 14 using namespace std; 15 typedef bool boolean; 16 17...
https://codeforces.com/problemset/submission/1336/245312849 163 P9999 [Ynoi2000] tmostnrq 有个soft-O(n1.5)的思路是:分块,然后建立每块的虚树。散块直接暴力,整块考虑几种情况: 点在虚树外:往靠近虚树的方向移动。 点在虚树一条虚链上:找下一个到达虚树上点的位置,这个可以对于每条链建立个前缀和数组...
solution idea code →Reply kostka 6 years ago,#| +25 Mhm... nice problem. Do you agree,mnbvmar? →Reply mnbvmar 6 years ago,#^| ←Rev.3→+27 <3 Story: We proposed this exact task (under a tiny bit different constraints, though) to our high school students back in 2015. I was...
Submission #238323535 - Codeforces 93 CF1909G Pumping Lemma 先求出s和t的最长公共后缀的长度l,那么对于s[1,n−l],它一定只能作为串x中的一部分,于是可以把它和t中的一段前缀匹配之后删掉。 此时s是t的一段后缀。考虑y在s和t的出现位置:
Solution Set #4 最近写了不少 AGC,感觉高一的时候做挺合适的,不过高一出于对 ad-hoc 和外星人题的恐惧一直没怎么写。其实古早题还是有不少能做的,希望学弟不要像我一样。 36 2nd ucup Stage 13 Shenyang F Ursa Minor 首先显然用区间内的操作可以组成它们的 gcd 对应的操作。由于序列是环形的,所以还可以...
Problem Solution 对于这种求多个∑∑后面跟个gcd,lcmgcd,lcm的式子一般都要用莫比乌斯反演。 想办法将式子化出[n==1][n==1]形式 过程推导如下: ∑ni=1∑nj=1lcm(Ai,Aj)∑i=1n∑j=1nlcm(Ai,Aj)(以下nn因为与AiAi同阶,所以沿用) =∑ni=1∑nj=1lcm(i,j)×cnti×cntj=∑i=1n∑j=1nlcm(i,j...