题目链接: Balanced Substring 题意: 求一个只有1和0的字符串中1与0个数相同的子串的最大长度. 题解: 我的解法是设1的权值是1,设0的权值是-1,求整个字符串的前缀和并记录每个前缀和出现的最后位置.因为两个相同的前缀和之间的子串一定符合条件,最后只用遍历一次,将每个前缀与和这个前缀值相同的位置之间的长度求出来就是符合条件的子串长度.但是这里一定要注意!在整个子串未开始遍历的时候这个子串的前缀和也是0.我就是在这个地方错了,这里给出错地方的数据. #include<bits…

B. Balanced Substring You are given a string s consisting only of characters 0 and 1. A substring [l, r] of s is a string slsl + 1sl + 2... sr, and its length equals to r - l + 1. A substring is called balanced if the number of zeroes (0) equals to t…

CF873B Balanced Substring (前缀和) 蛮有意思的一道题,不过还是.....................因为CF评测坏了,没有试过是否可过. 显然求\(\sum[i][0] - \sum[l][0] = \sum[i][1] - \sum[l][1]\) \(\sum[i][0] - \sum[l][1] = \sum[i][0] - \sum[l][0]\) 然后hash一下DP即可. #include <iostream> #include <cstdio…

B. Balanced Substring time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given a string s consisting only of characters 0 and 1. A substring [l, r] of s is a string slsl + 1sl + 2... s…

inputstandard input outputstandard output You are given a string s consisting only of characters 0 and 1. A substring [l, r] of s is a string slsl + 1sl + 2… sr, and its length equals to r - l + 1. A substring is called balanced if the number of zero…

Description You are given a string s consisting only of characters 0 and 1. A substring [l, r] of s is a string slsl + 1sl + 2... sr, and its length equals to r - l + 1. A substring is called balanced if the number of zeroes (0) equals to the number…

P1360 [USACO07MAR]Gold Balanced Lineup G (前缀和+思维) 前言 题目链接 本题作为一道Stl练习题来说,还是非常不错的,解决的思维比较巧妙 算是一道不错的题 思路分析 第一眼看到这题,我还以为是数据结构题,看来半天没看出来数据结构咋做(我还是太菜了) 我们对\(m\)种能力有\(n\)次操作,需要找到对每种能力提升相同的最大操作区间的长度,求最大 区间,我们考虑维护这\(m\)种技能提升值的前缀和,假设第\(l+1\)次操作到第\(r\)次操作对\(m\…

time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output You are given a string s consisting only of characters 0 and 1. A substring [l, r] of s is a string slsl + 1sl + 2... sr, and its length equals t…

You are given a string s consisting only of characters 0 and 1. A substring [l, r] of s is a string slsl + 1sl + 2... sr, and its length equals to r - l + 1. A substring is called balanced if the number of zeroes (0) equals to the number of ones in t…

time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given a string s consisting only of characters 0 and 1. A substring [l, r] of s is a string slsl + 1sl + 2... sr, and its length equa…