Not able to solve this problem during the contest (virtual participation). The first observation is that if we can identify $N-1$ balls of which half is blue and the other half is red, then with these $N - 1$ balls we can identify the color of the re…
国际 C 语言混乱代码大赛(IOCCC, The International Obfuscated C Code Contest)是一项国际编程赛事,从 1984 年开始,每年举办一次(1997年.1999年.2002年.2003年和2006年例外).目的是写出最有创意的最让人难以理解的C语言代码. 获奖者列表 1984 anonymous prints hello world, where read is write 1984 decot prints garbage, weird…
CODE FESTIVAL 2016 qual A A - CODEFESTIVAL 2016 -- #include <bits/stdc++.h> #define fi first #define se second #define pii pair<int,int> #define mp make_pair #define pb push_back #define space putchar(' ') #define enter putchar('\n') #define e…
CODE FESTIVAL 2016 qual B A - Signboard -- #include <bits/stdc++.h> #define fi first #define se second #define pii pair<int,int> #define mp make_pair #define pb push_back #define space putchar(' ') #define enter putchar('\n') #define eps 1e-10…
CODE FESTIVAL 2016 qual C A - CF -- #include <bits/stdc++.h> #define fi first #define se second #define pii pair<int,int> #define mp make_pair #define pb push_back #define space putchar(' ') #define enter putchar('\n') #define eps 1e-10 #defin…
CODE FESTIVAL 2017 qual B B - Problem Set 确实水题,但当时没想到map,用sort后逐个比较解决的,感觉麻烦些,虽然效率高很多.map确实好写点. 用map: #include<iostream> #include<cstdio> #include<cstdlib> #include<map> using namespace std; map<int,int>mp; int main() { int n,…
CODE FESTIVAL 2017 qual B C - 3 Steps 题意:给定一个n个结点m条边的无向图,若两点间走三步可以到,那么两点间可以直接连一条边,已经有边的不能连,问一共最多能连多少条边. 题解:其实我不知道二分图的实际算法,网上有人说这可以看成是否是二分图来做. 有人给出了个性质(没发现>_<):相邻奇数长度的两个点一定能连边 二分图就是一个图的结点分别在两个不相交的集合S,T中,且每条边都在两个集合中.(不严谨说法)如果是二分图,那么能连的边数就是|S|*|T|-m…
M-SOLUTIONS Programming Contest 2020 题解 目录 M-SOLUTIONS Programming Contest 2020 题解 A - Kyu in AtCoder B - Magic 2 C - Marks D - Road to Millionaire E - M's Solution F - Air Safety 题目质量好高啊,做完感觉好难涨智商了诶.(除了某一道程序又臭又长的F) A - Kyu in AtCoder 我们可以放很多个if来判断,但…
