zoukankan      html  css  js  c++  java
  • Case of the Zeros and Ones

    Time Limit:1000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u

    Description

    Andrewid the Android is a galaxy-famous detective. In his free time he likes to think about strings containing zeros and ones.

    Once he thought about a string of length n consisting of zeroes and ones. Consider the following operation: we choose any two adjacent positions in the string, and if one them contains 0, and the other contains 1, then we are allowed to remove these two digits from the string, obtaining a string of length n - 2 as a result.

    Now Andreid thinks about what is the minimum length of the string that can remain after applying the described operation several times (possibly, zero)? Help him to calculate this number.

    Input

    First line of the input contains a single integer n (1 ≤ n ≤ 2·105), the length of the string that Andreid has.

    The second line contains the string of length n consisting only from zeros and ones.

    Output

    Output the minimum length of the string that may remain after applying the described operations several times.

    Sample Input

    Input
    4
    1100
    Output
    0
    Input
    5
    01010
    Output
    1
    Input
    8
    11101111
    Output
    6
    程序分析:此题的意思就是找出0比1多多少个,或者是1比0多多少个。也就是0和1的差。所以我需要分别统计出0和1的个数就好,然后在做差运算即可。
    程序代码:
    #include<iostream>
    
    using namespace std;
    char a[200005];
    int main()
    { 
        int n,l,b=0,t,c=0;
        cin>>n;
        for(l=0;l<n;l++)
        {    cin>>a[l];
    
            if(a[l]=='1')
            c++;
            else b++;
        }
            if(b>c)
            t=b-c;
            else t=c-b;
        cout<<t<<endl;
            return 0;
    }
  • 相关阅读:
    python生成6位纯数字
    win10下配置nginx
    Unexpected end of JSON input while parsing near '…"
    el-select中显示图标/图片设置
    github上拉去代码执行 npm install报错code:128
    win10下配置多个mysql数据库
    centos7标准版命令界面和图形界面相互切换
    华为RH2288V3服务器部署指南
    datatables屏蔽警告弹窗
    迁移数据时 timestamp类型字段报错: 1067
  • 原文地址:https://www.cnblogs.com/yilihua/p/4693079.html
Copyright © 2011-2022 走看看