题意:往集合里面添加删除数,集合中的数是按从小到大排列的,询问下标模5等于3的数的和. 记得当时这题不会做, 现在想简单多了,只要维护五个值和左右子树的size大小就行了. #define maxn 100005 struct node { int l,r; int sz; i64 f[]; int mid() { ; } }; node tt[maxn * ]; struct node1 { int id ; i64 x; }; node1 ml[maxn]; void push_up(int…

We Love MOE Girls Time Limit: 1000/500 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 208    Accepted Submission(s): 157 Problem Description Chikami Nanako is a girl living in many different parallel worlds. In this…

F(x) Time Limit: 1000/500 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 382    Accepted Submission(s): 137 Problem Description For a decimal number x with n digits (AnAn-1An-2 ... A2A1), we define its weight as F(x…

A Bit Fun Time Limit: 5000/2500 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 423    Accepted Submission(s): 270 Problem Description There are n numbers in a array, as a0, a1 ... , an-1, and another number m. We de…

G(x) Time Limit: 2000/500 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 184    Accepted Submission(s): 44 Problem Description For a binary number x with n digits (AnAn-1An-2 ... A2A1), we encode it as Where ""…

Minimum palindrome Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 260    Accepted Submission(s): 127 Problem Description Setting password is very important, especially when you have so many "in…

ACM-ICPC 南昌网络赛F题 Megumi With String 题目描述 给一个长度为\(l\)的字符串\(S\),和关于\(x\)的\(k\)次多项式\(G[x]\).当一个字符串\(str\)是S的子串时,定义\(str\)的\(value\)值为\(G[length(str)]\),否则\(value=0\).一个字符串的\(power\)值定义为其所有子串的\(value\)之和.每次向\(S\)末尾添加一个字符,重复\(m\)次.求每次添加字符后,一个长度为\(n\)的随机串\…

ACM-ICPC 2019南昌网络赛I题 Yukino With Subinterval 题目大意:给一个长度为n,值域为[1, n]的序列{a},要求支持m次操作: 单点修改 1 pos val 询问子区间中某个值域的数的个数,连续的相同数字只记为一个.(即统计数字段的个数) 2 L R x y 数据范围: 1 ≤ n,m ≤ 2×10^5 1 ≤ a[i] ≤ n 解题思路: 连续重复的数字只记一次.所以考虑将每个数字段除第一个出现外的数字都删去(记为0).在读入操作的时候暴力模拟,同时维护…

2019ICPC南京网络赛A题 The beautiful values of the palace https://nanti.jisuanke.com/t/41298 Here is a square matrix of n * nn∗n, each lattice has its value (nn must be odd), and the center value is n * nn∗n. Its spiral decline along the center of the squar…

Cut the Cake Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 300    Accepted Submission(s): 135 Problem Description MMM got a big big big cake, and invited all her M friends to eat the cake toge…