修仙场,没脑子,C边界判错一直在写mdzz..D根本没怎么想. 第二天起来想了想D这不是水题吗立马A了.看了看E一开始想分配问题后来发觉想岔了,只需要每次都把树最后分配的点移到最前面就好了. A. Paper Airplanes time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output To make a paper airplane,…
Codeforces Round #383 (Div. 2) A. Arpa's hard exam and Mehrdad's naive cheat 题意 求1378^n mod 10 题解 直接快速幂 代码 #include<bits/stdc++.h> using namespace std; long long quickpow(long long m,long long n,long long k) { long long b = 1; while (n > 0) { if…
BC都被hack的人生,痛苦. 下面是题解的表演时间: A. QAQ "QAQ" is a word to denote an expression of crying. Imagine "Q" as eyes with tears and "A" as a mouth. Now Diamond has given Bort a string consisting of only uppercase English letters of leng…
A - Buying A House 题意:给你n个房间,妹子住在第m个房间,你有k块钱,你想买一个离妹子最近的房间.其中相邻的房间之间距离为10,a[i]=0表示已经被别人买了. 题解:扫一遍更新答案即可. #include<bits/stdc++.h> using namespace std; const int maxn = 105; int mp[maxn]; int n,m,k; int main(){ scanf("%d%d%d",&n,&m,&…