A. Anton and Polyhedrons Anton's favourite geometric figures are regular polyhedrons. Note that there are five kinds of regular polyhedrons: Tetrahedron. Tetrahedron has 4 triangular faces. Cube. Cube has 6 square faces. Octahedron. Octahedron has 8 …

Codeforces Round #404 (Div. 2) 题意:对于 n and m (1 ≤ n, m ≤ 10^18)  找到 1) [n<= m] cout<<n; 2) [n>m]最小的 k => (k -m) * (k-m+1) >= (n-m)*2 成立 思路:二分搜索 #include <bits/stdc++.h> #include <map> using namespace std; #define LL long long…

Codeforces Round #366 (Div. 2) A I hate that I love that I hate it水题 #I hate that I love that I hate it n = int(raw_input()) s = "" a = ["I hate that ","I love that ", "I hate it","I love it"] for i in ran…

Codeforces Round #247 (Div. 2) http://codeforces.com/contest/431  代码均已投放:https://github.com/illuz/WayToACM/tree/master/CodeForces/431 A - Black Square 题目地址 题意:  Jury玩别踩白块,游戏中有四个区域,Jury点每一个区域要消耗ai的卡路里,给出踩白块的序列,问要消耗多少卡路里. 分析:  模拟水题.. 代码: /* * Author: i…

昨晚玩游戏竟然不小心错过了CF..我是有多浪啊. 今天总算趁着下课时间补了,感觉最后两题还是挺有意思的,写个题解. D: 题目大意: 给出一个括号序列,问有多少个子序列 是k个'(' + k个')' 这样的形式.        n<=200000 解法: 对于每个'('的位置,计算以它为最右边的'('的合法子序列数. 假设它左边(包括它)有$l$个'(', 右边有 $r$个')' ,  如果子序列的长度2k, 那么 方案数有$\binom{l-1}{k-1} * \binom{r}{k}= \b…

D. Anton and School - 2 题目连接: http://codeforces.com/contest/785/problem/D Description As you probably know, Anton goes to school. One of the school subjects that Anton studies is Bracketology. On the Bracketology lessons students usually learn differ…

题目链接:http://codeforces.com/contest/785 A. Anton and Polyhedrons time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Anton's favourite geometric figures are regular polyhedrons. Note that there…

A. Anton and Polyhedrons time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output Anton's favourite geometric figures are regular polyhedrons. Note that there are five kinds of regular polyhedrons:…

A. Anton and Polyhedrons 题目链接:http://codeforces.com/contest/785/problem/A 智障水题 实现代码: #include<bits/stdc++.h> using namespace std; int main(){ string s; ,t; cin>>t; while(t--){ cin>>s; if(s=="Tetrahedron") ans+=; else if(s==&quo…

C. Anton and Fairy Tale 题目连接: http://codeforces.com/contest/785/problem/C Description Anton likes to listen to fairy tales, especially when Danik, Anton's best friend, tells them. Right now Danik tells Anton a fairy tale: "Once upon a time, there liv…