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E. Bring Balance （括号匹配问题+贪心+前缀和）(CF 794 d2)

E. Bring Balance time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output Alina has a bracket sequence s of length 2n, consisting of n opening brackets '(' and n closing brackets ')'. As

POJ 3264 Balanced Lineup

题目传送门树状数组求最大最小值，一次成型，不能跑两回啊！ #include <iostream> #include <string.h> #include <stdio.h> #include <vector> #include <map> #include <queue> #include <algorithm> #include <math.h> #include <cstdio> using

B. A Perfectly Balanced String?

题目链接 B. A Perfectly Balanced String? 给出一个字符串 \(s\) ，对于 \(s\) 中出现过的任意两个字母 \(u, v\) ，定义一个 Balanced 的字符串满足在任何一个子串中 \(u\) 和 \(v\) 的出现次数相差不超过 1 . 判断字符串是否满足 Balanced 条件. 解题思路思维满足条件的字符串

LeetCode 1541. Minimum Insertions to Balance a Parentheses String

原题链接在这里：https://leetcode.com/problems/minimum-insertions-to-balance-a-parentheses-string/ 题目： Given a parentheses string s containing only the characters '(' and ')'. A parentheses string is balanced if: Any left parenthesis '(&#

LeetCode 1963. Minimum Number of Swaps to Make the String Balanced

原题链接在这里：https://leetcode.com/problems/minimum-number-of-swaps-to-make-the-string-balanced/ 题目： You are given a 0-indexed string s of even length n. The string consists of exactly n / 2 opening brackets '[' and n / 2 closing brackets ']'

POJ 3264 Balanced Lineup

题目传送门本题调试过程中，出现了奇怪的问题： \(G++\) \(AC\) ,\(C++\) \(Complie\) \(Error\) 以后调用\(POJ\),还是老实的\(G++\)吧~ //#include <bits/stdc++.h> #include <iostream> #include <string.h> #include <stdio.h> #include <vector> #include &

洛谷P2880 [USACO07JAN] Balanced Lineup G（树状数组/线段树）

维护区间最值的模板题。 1.树状数组 1 #include<bits/stdc++.h> 2 //树状数组做法 3 using namespace std; 4 const int N=5e4+10; 5 int m,ma[N],mi[N],n,c[N]; 6 7 int lowbit(int x){ 8 return x&(-x); 9 } 10 11 void ins(int x,int v){ 12 while(x<=n){

Balanced Lineup

题目链接：https://www.luogu.com.cn/problem/P2880 1 #include<cstdio> 2 #include<cmath> 3 #include<algorithm> 4 using namespace std; 5 const int maxn=5e4+10; 6 int n, q, h[maxn]; 7 int a, b; 8 int f[maxn][21], g[maxn][21]; 9 int maxh,

POJ 3264 Balanced Lineup

题目链接：POJ 3264 Balanced Lineup 题目大意：题解： ST表模板。 #include <cstdio> #include <cstring> #include <iostream> using namespace std; int num[50005], minn[50005][50], maxn[50005][50], n, q; void stPreWork() { for (int i = 1; i <= n; ++i

C. Balanced Stone Heaps

https://codeforces.com/problemset/problem/1623/C 题意：有n堆石子，第i堆石子有hi个石子，你可以从第3堆开始到第n堆，将d个石子移动到i - 1堆和2d个石子移动到i - 2堆，问最后最大的最小堆为多少。题解：二分！！！（代码有说明！） #include<iostream> #include<algorithm> #include<cstring> #

[LeetCode] 110. Balanced Binary Tree

Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined as: a binary tree in which the left and right subtrees of every node differ in height by no more than 1. Example1: Input: root = [3,9,20,nu

P2880 [USACO07JAN]平衡的阵容Balanced Lineup 题解

瞎扯刚看到这个题目的时候我就吓着了：蓝题？溜了溜了……但是还是好奇地点进去看了一下。看完题面之后，恕我冒昧说一句话，这题不应该是黄题吗？怎么会是蓝题？简直就是明显（luo）到不能再明显（luo）的RMQ问题。正题所谓RMQ问题，就是找一个序列某段区间当中，最大或最小的数是多少。而解决它的一种

题解 - CF 873B. Balanced Substring

873B. Balanced Substring 思路设'1' = '1' , '0' = '-1', 用sum记录前缀和，用pos数组记录a数组中前缀和等于k的第一个位置，因为前缀和表示1和0的个数差，当sum[a] == sum[b]， (a,b]中的0和1的个数一定相同。代码 #include <stdio.h> #include <string.h> #include <algorit

CF1569A Balanced Substring 题解

题目传送门题意给出 \(T\) 个长度为 \(n\) 且仅含 \(\texttt{a}\) ， \(\texttt{b}\) 的字符串，对于每个字符串，输出任意的 \(l\) ，\(r\) ，表示字符串的第 \(l\) 个字符到第 \(r\) 中 \(\texttt{a}\) ， \(\texttt{b}\) 字符的数量相同。 \(\texttt{SOLUTION}\) 记字符串为 \(s\) ，字符串

Direct Measure Matching for Crowd Counting

Direct Measure Matching for Crowd Counting IJCAI 2021 motivation 传统高斯处理办法因为高斯核会产生误差，影响精度 Idea 提出了一种新的基于度量的计数方法，将预测的密度图直接回归到散点标注的地面真实值。人群计数是一个度量匹配问题。我们推导了一种半平衡形式的Sin

[LeetCode] 1234. Replace the Substring for Balanced String 替换子串得到平衡字符串

You are given a string containing only 4 kinds of characters 'Q', 'W', 'E' and 'R'. A string is said to be balancedif each of its characters appears n/4 times where n is the length of the string. Return the minimum

[LeetCode] 1221. Split a String in Balanced Strings 分割平衡字符串

Balanced strings are those that have an equal quantity of 'L' and 'R' characters. Given a balanced string s, split it in the maximum amount of balanced strings. Return the maximum amount of split balanced strings. Example 1: Input: s =

使用栈进行简单括号匹配

''' 栈实现语言: Python 有次序的数据集, 每个数据仅从栈顶一端加入和从数据集中移除 ''' class Stack: def __init__(self): self.items = [] def isEmpty(self): return self.items == [] # 入栈 def push(self, item): self.items

1221. Split a String in Balanced Strings

题目： Balanced strings are those that have an equal quantity of 'L' and 'R' characters. Given a balanced string s, split it in the maximum amount of balanced strings. Return the maximum amount of split balanced strings. Example 1: Input

Balanced Binary Tree

Code link: https://leetcode.com/problems/balanced-binary-tree/ Constraint: The number of nodes in the tree is in the range [0, 5000]. This means we can use recursion? Idea: Note the definition of height and depth might be differnt from the official defi

14.3 balance_pgdat函数

balance_pgdat()函数是回收页面的主函数。这个函数比较长，首先看一个框架，主体函数是一个很长的while循环。代码如下： /* * For kswapd, balance_pgdat() will work across all this node's zones until * they are all at high_wmark_pages(zone). * * Returns the fin

[Usaco2007 Jan]Balanced Lineup

嘟嘟嘟一道RMQ板子题，分别维护最大值和最小值，不解释。 1 #include<cstdio> 2 #include<iostream> 3 #include<algorithm> 4 #include<cmath> 5 #include<cstring> 6 #include<cstdlib> 7 #include<cctype> 8 #include<stack> 9 #incl

P3067 [USACO12OPEN]Balanced Cow Subsets G

856. Score of Parentheses

Given a balanced parentheses string S, compute the score of the string based on the following rule: () has score 1 AB has score A + B, where A and B are balanced parentheses strings. (A) has score 2 * A, where A is a balanced parentheses string. E

Gold Balanced Lineup POJ - 3274

原题链接考察：hash+前缀和做完这道题感觉终于懂一点hash了,散列表hash是将值存储在映射的键里,会有不同值映射到相同键,因此必须要处理冲突这道题牛二进制的前缀和会根据ash函数映射到相同键,这些前缀和有些和答案要求根本不符,所以我们必须筛掉那些不符合的键,也就是说这道题我