NO.7 ABC276E是道很有趣但是又有点恼人的题...初看就很简单,但是感觉好像也不是很好判断...然后想了半天,一直在bfs和dfs之间纠结,最后发现了一种比较好维护的bfs方法。因为其实如果能形成回路,那么一定存在一个一进一出,所以可以考虑先把出发点四周的四个临近的点标上不同的号,然后进行bfs,如果发现有两个...
https://atcoder.jp/contests/abc143/tasks/abc143_e 双关键字dijkstradijkstra https://atcoder.jp/contests/abc143/tasks/abc143_f 双指针,从大到小求解,求解每次拿ii个时,将出现次数小于等于ii的看做随意放置的填充物,出现次数大于ii的每种每次拿一个。
1). FactorizeMMand computenumi=primeexponentiinumi=primeiexponentiinMM. If someaiaidoes not divideMM, we can ignoreaiai(the exponent of some prime is bigger inaiaithan inMM). For eachaiaithat divides M, let's assign a bitmask to it. The j-th bit will be on ifnumjnumjdividesaiai. I...
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abc167 E - Colorful Blocks 二項係数 abc021 D - 多重ループ 二項係数 agc025 B - RGB Coloring 二項係数, 素因数分解 arc077 D - 11 二項係数 arc116 C - Multiple Sequences 二項係数, 素因数分解 practice2 B - Fenwick Tree Binary Indexed Tree abc038 D - プレゼント Binary ...
W)brute which fits into the time limit pretty easily. foriin[1,H]:forjin[1,W]:if(i,j)isnotcovered:tryto place thenexttilewithits top left corner at(i,j)
Problem Statement The door of Snuke's laboratory is locked with a security code. The security code is a 44-digit number. We say the security code ishard to enterwhen it contains two consecutive digits that are the same. You are given the current security code SS. If SS is hard to ente...
abc出现次数的最大值和最小值相差不超过1 代码 #include <bits/stdc++.h> #define fi first #define se second #define pii pair<int,int> #define pdi pair<db,int> #define mp make_pair #define pb push_back #define enter putchar('\n') #define space putchar(' ') #define eps 1e-8 #...
ABC349 1693+67=17601693+67=1760 A ~ D 都比较顺畅,D 题盲猜lowbitlowbit喜提机房一血,E 题没开long long喜提一发罚时与机房一血 然后就坐着与 F & G 干瞪眼,F 先是用 cdq 尝试水分,后来将不是MM因数的删掉了,还是不行 最后发现MM最多有1313个因数,直接O(213N)≈1.638×109O(213N)≈1.638×10...
Time Limit: 2 sec / Memory Limit: 1024 MB Problem Statement The window of Takahashi's room has a width of A. There are two curtains hung over the window, each of which has a horizontal length of B. (Vertically, the curtains are long enough to cover the whole window.) ...