D. MST Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math notebooks: it is time to sort them out. This time he found an old dusty graph theory notebook with a de ...
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Codeforces Round #599 (Div. 2) D. 0-1 MST Description Ujan has a lot of useless stuff in his drawers, a considerable part of which are his math ...
B. Strange List 题目分析 题意：给你一个长度为n的数组和一个数字x，从第一个元素开始，如果改元素q能被x整除，那么将就在数组后面新增x个(q / x)，直到遇到的元素不能被x整除，求最后数组的元素之和 让我们从样例开始入手分析：样例中的第一个情况数组a为[12]，x为2，数组 ...
You have n gifts and you want to give all of them to children. Of course, you don't want to offend a ...
Young wilderness explorers set off to their first expedition led by senior explorer Russell. Explore ...
题目连接：https://codeforces.com/contest/1323/problem/B 题意：给一个大小为n的a数组，一个大小为m的b数组，c数组是二维数组c[i][j]=a[i]*b[j]，问面积为k的矩形有几个。 题解：先把k的所有因子存入一个数组里，然后遍历因子，表示 ...
B2. Character Swap (Hard Version) This problem is different from the easy version. In this version Ujan makes at most 2𝑛 swaps. In addition ...
B. Lipshitz Sequence Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/601/problem/B Description A function is called ...
B. PIN Codes A PIN code is a string that consists of exactly 4 digits. Examples of possible PIN codes: 7013, 0000 and 0990. Please note that the PIN ...
