Problem Description You are given a tree with N nodes which are numbered by integers 1..N. Eac ...
Problem Description Mex is a function on a set of integers, which is universally used for impartial game theorem. For a non negative integer set S, mex S is defined as the least non negative integer ...
2013-09-15 21:56 16 1218 推薦指數:
Problem Description You are given a tree with N nodes which are numbered by integers 1..N. Eac ...
Mex Time Limit: 15000/5000 MS (Java/Others) Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 623 Accepted Submission(s): 209 ...
題目鏈接:http://acm.hdu.edu.cn/showproblem.php?pid=4747 題意:有一組序列a[i](1<=i<=N), 讓你求所有的mex(l,r), mex(l,r)表示區間[l,r]中最小的未在序列中出現的非負整數。 思路:冥思苦想半天 ...
思路:分析知道sum(1,i) (1<=i<=n) 具有單調性。每次求出1-i之間的所有可能值, 注意每次增加一個數時對結果的影響,用mp數組維護下就可以!! 代碼如下: ...
題意:一個長度為\(n\)的序列\(x\),\(m\)次操作,有兩種,一種是對區間\([l,r]\)的數乘上\(w\),一種是詢問\([l,r]\)的每個數的歐拉函數之和。 題解: ...
地址 Rank Solved A B C D E F G H I J K ...
https://codeforces.com/gym/101981 Problem A. Adrien and Austin 貪心,注意細節 f[x]=1:先手必贏。 f[x]: ...
é 題意: 題目給出一棵樹,樹上有一些結點是特殊點,問在這些特殊點之間的路徑上(包括特殊點在內)一共 ...