题目: Given a string with parentheses, return a string with balanced parentheses by removing the fewest characters possible. You cannot add anything to the string. Examples: balance("()") -> "()" bala
原题: You are given a string consisting of parentheses () and []. A string of this type is said to be correct: (a) if it is the empty string (b) if A and B are correct, AB is correct, (c) if A is co
0、论文背景 本文是在CBCC1和CBCC2的基础上提出了CBCC3。在本文中,证明了过度探索和过度开发是现有CBCC变体中性能损失的两个主要来源。在此基础上,提出了一种新的基于贡献的算法,可以在探索和开发之间保持更好的平衡。 Omidvar M N, Kazimipour B, Li X, et al. CBCC3—A contribution-based cooperative co-e
题目:http://acm.hdu.edu.cn/showproblem.php?pid=1709 题目大意为由这些砝码,看不能表示的最小的重量是多少 则和个体问题在于天平的每个砝码都可以放在天平的两边 #include<stdio.h> #include<math.h> #include<stdlib.h> int c1[10005],c2[10005]; int a[105],ans[100
Balance Description Gigel has a strange “balance” and he wants to poise it. Actually, the device is different from any other ordinary balance. It orders two arms of negligible weight and each arm’s
题目链接:https://codeforces.com/contest/1242/problem/C 具体做法参照题解,记录一个子集当中dp的方法 https://cp-algorithms.com/algebra/all-submasks.html 代码: #include<bits/stdc++.h>#define xx first#define yy second
算是BST经典问题。另外一个相关的是面橘色打车软件时被问过:判断一个BST是不是平衡的。回到问题,这题我用了笨办法,把全部节点的value拿出啦,sort之后,每次用最中间的值。以此思路递归。 # Definition for a binary tree node.# class TreeNode:# def __init__(self, val=0, left=None, righ
POJ2142http://poj.org/problem?id=2142 扩展欧几里德+(x+y)取最小 Description Ms. Iyo Kiffa-Australis has a balance and only two kinds of weights to measure a dose of medicine. For example, to measure 200mg of
题目链接 CF方向 Luogu方向 题目解法 首先观察数据可以发现答案 ≤ 2 \le 2 ≤2(别问我怎么发现的 首先判掉 a n s = 0 ans=0 ans=0 的情况 考虑 a n s = 1 ans=1 ans=1 的情况(下面把 n n n 当做 n ∗ 2 n*2 n∗2) 把 ( ( ( 当成 1 1 1, ) ) ) 当成 − 1 -1 −1,令 s