Problem Description In mathematics and computer science, an algorithm describes a set of procedures or instructions that define a procedure. The term has become increasing popular since the advent of cheap and reliable computers. Many companies now e…

Minimum Inversion Number Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 19575    Accepted Submission(s): 11756 Problem Description The inversion number of a given number sequence a1, a2, ...,…

注意添加到集合中的数是升序的,先将数据读入,再离散化. sum[rt][i]表示此节点的区域位置对5取模为i的数的和,删除一个数则右边的数循环左移一位,添加一个数则右边数循环右移一位,相当于循环左移4位,线段树与树状数组结合,树状数组确定位置. le[rt]表示左移的位数,区间更新懒惰标记 #include <iostream> #include <cstdio> #include<cstdlib> #include<map> #include<alg…

Brainman Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 10575   Accepted: 5489 Description BackgroundRaymond Babbitt drives his brother Charlie mad. Recently Raymond counted 246 toothpicks spilled all over the floor in an instant just b…

题目链接 线段树入门题,线段树单点更新求最大值问题. #include <iostream> #include <cstdio> #include <cmath> #include <cstring> #include <algorithm> #define N 200005 using namespace std; int data[N]; struct Tree { int l,r,ans; }tree[N*]; void build(int…

I Hate It [题目链接]I Hate It [题目类型]线段树单点替换+区间最值 &题意: 本题目包含多组测试,请处理到文件结束. 在每个测试的第一行,有两个正整数 N 和 M ( 0<N<=200000,0<M<5000 ),分别代表学生的数目和操作的数目. 学生ID编号分别从1编到N. 第二行包含N个整数,代表这N个学生的初始成绩,其中第i个数代表ID为i的学生的成绩. 接下来有M行.每一行有一个字符 C (只取'Q'或'U') ,和两个正整数A,B. 当C为'…

敌兵布阵 单点更新和区间更新还是有一些区别的,应该注意! [题目链接]敌兵布阵 [题目类型]线段树单点更新 &题意: 第一行一个整数T,表示有T组数据. 每组数据第一行一个正整数N(N<=50000),表示敌人有N个工兵营地,接下来有N个正整数,第i个正整数ai代表第i个工兵营地里开始时有ai个人(1<=ai<=50). 接下来每行有一条命令,命令有4种形式: (1) Add i j,i和j为正整数,表示第i个营地增加j个人(j不超过30) (2)Sub i j ,i和j为正整数…

题目链接 Description During the War of Resistance Against Japan, tunnel warfare was carried out extensively in the vast areas of north China Plain. Generally speaking, villages connected by tunnels lay in a line. Except the two at the ends, every village…

I Hate It Time Limit: 9000/3000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 71311    Accepted Submission(s): 27589 Problem Description 很多学校流行一种比较的习惯.老师们很喜欢询问,从某某到某某当中,分数最高的是多少. 这让很多学生很反感. 不管你喜不喜欢,现在需要你做的是,就是按照老师…

敌兵布阵 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 87684    Accepted Submission(s): 36912 Problem Description C国的死对头A国这段时间正在进行军事演习,所以C国间谍头子Derek和他手下Tidy又开始忙乎了.A国在海岸线沿直线布置了N个工兵营地,Derek和Tidy的任务…