ZZ出题人写NTT写成ZZ了吧,全是998244353,不需要取模的东西强行取模搞得我以为答案很大想了好久(指B题) A.任意输出 \([l,r]\) 内的一组满足 \(x \mid y\) 的 \(x, y\) ,保证有答案 我输出了 \(\lfloor \frac{r}{l} \rfloor \times l\) 输出2l也行 int main() { int T; in, T; while (T--) { int l, r; in, l, r; out, l, ' ', r / l * l

感慨 最终就做出来一个题,第二题差一点公式想错了,又是一波掉分,不过我相信我一定能爬上去的 A Find Divisible(思维) 上来就T了,后来直接想到了题解的O(1)解法,直接输出左边界和左边界*2即可 代码 #include <bits/stdc++.h> using namespace std; int main() { ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); long long x,y,t; cin>>t;

Educational Codeforces Round 36 (Rated for Div. 2) F. Imbalance Value of a Tree You are given a tree T consisting of n vertices. A number is written on each vertex; the number written on vertex i is ai. Let's denote the function I(x,?y) as the differ

Educational Codeforces Round 69 (Rated for Div. 2) B - Pillars There are n pillars aligned in a row and numbered from 1 to n. Initially each pillar contains exactly one disk. The i-th pillar contains a disk having radius ai. You can move these disks

原文链接:https://www.cnblogs.com/xwl3109377858/p/11405773.html Educational Codeforces Round 71 (Rated for Div. 2) D - Number Of Permutations You are given a sequence of n pairs of integers: (a1,b1),(a2,b2),…,(an,bn). This sequence is called bad if it is

Educational Codeforces Round 36 (Rated for Div. 2) 题目的质量很不错(不看题解做不出来,笑 Codeforces 920C 题意 给定一个\(1\)到\(n\)组成的数组,只可以交换某些相邻的位置,问是否可以将数组调整为升序的 解题思路 首先如果每个数都能通过交换到它应该到的位置,那么就可以调整为升序的. 但实际上交换是对称的,如果应该在的位置在当前位置前方的数都交换完成,那么整体就是排好序的,因为不可能所有不在相应位置的数都在相应位置的后方.

Codeforces Educational Codeforces Round 44 (Rated for Div. 2) E. Pencils and Boxes 题目连接: http://codeforces.com/contest/985/problem/E Description Mishka received a gift of multicolored pencils for his birthday! Unfortunately he lives in a monochrome w

Educational Codeforces Round 55 (Rated for Div. 2) 链接 A Vasya and Book 傻逼题..注意判边界. #include<cstdio> #include<cstring> #include<algorithm> #include<queue> #include<set> #include<map> #include<vector> #include<cm

get人生第七场CF! 成绩:(exACM) rank AC3/7 Penalty104 rating() 题目:Educational Codeforces Round 58 (Rated for Div. 2) 错题题解: C. Division and Union 原文地址:https://www.cnblogs.com/xht37/p/10260260.html