Description You are given a sequence a1, a2, …, an consisting of different integers. It is required to split this sequence into the maximum number of subsequences such that after sorting integers in each of them in increasing order, the total
Description A New Year party is not a New Year party without lemonade! As usual, you are expecting a lot of guests, and buying lemonade has already become a pleasant necessity. Your favorite store sells lemonade in bottles of n different
這個題二分做,對於確定x更新次,我們可以確定是否能夠更新,如果滿足任意a[i]<x && ∑(x-a[i]) >=x就滿足情況。對x來說x越大,越快讓每個人更新好,這樣就有個單調性,就可以用二分來做。 這題也沒想到二分做,做題要考慮多方面的解題思路把。說穿了還是題刷的不夠多,理解的不夠深刻。 /*If I get TLE , it is good.If I get AC,it's NICE !*/#include
Description Petya loves lucky numbers. Everybody knows that lucky numbers are positive integers whose decimal representation contains only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not. Let
Description Snark and Philip are preparing the problemset for the upcoming pre-qualification round for semi-quarter-finals. They have a bank of n problems, and they want to select any non-empty subset of it as a problemset. k experienced
這場多災多難啊。。fst了交錯程式了刪了stdio.h結果重裝cpp什麼的各種慘 A. Brain's Photos 出現C M Y中的任意一個就是彩色,否則黑白 B. Bakery 很容易得到答案肯定是一條邊的長度 枚舉邊,找一端是倉庫一端不是的,取最小值即可 C. Pythagorean Triples 可以分n奇偶直接構造 偶數:n^2-1,n^2+1 奇數:n^2/2,n^2/2+1 D. Persistent Bookcase 我們把所有操作建成樹,然後直接dfs後回溯即可
Description Given A,B,C, You should quickly calculate the result of A^B mod C. (1<=A,C<=1000000000,1<=B<=10^1000000). Input There are multiply testcases. Each testcase, there is one line contains three integers
Description With hands joined, go everywhere at a speed faster than our thoughts! This time, the Fire Sisters — Karen and Tsukihi — is heading for somewhere they’ve never reached — water-surrounded islands! There are three clusters of