Balala Power! HDU
来源:互联网 发布:手机实景地图软件 编辑:程序博客网 时间:2024/05/21 15:49
题目链接
Talented Mr.Tang has n strings consisting of only lower case characters. He wants to charge them with Balala Power (he could change each character ranged from a to z into each number ranged from 0 to 25, but each two different characters should not be changed into the same number) so that he could calculate the sum of these strings as integers in base 26 hilariously.Mr.Tang wants you to maximize the summation. Notice that no string in this problem could have leading zeros except for string "0". It is guaranteed that at least one character does not appear at the beginning of any string.The summation may be quite large, so you should output it in modulo 1e9+7.
Input
The input contains multiple test cases.For each test case, the first line contains one positive integers n, the number of strings. (1≤n≤100000)Each of the next n lines contains a string si consisting of only lower case letters. (1≤|si|≤100000,∑|si|≤1e6)
Output
For each test case, output " Case #x: y" in one line (without quotes), where x indicates the case number starting from 1 and ydenotes the answer of corresponding case.
Sample Input
1a2aabb3abaabc
Sample Output
Case #1: 25Case #2: 1323Case #3: 18221
题意:
给你 n 个字符串,其中每个字符代表一个不同的数字 0 - 25, 要求你计算所有字符串的和,并且使得和最大.
思路:
算贡献, 我们用一个数组num[i][j] 表示字母 i 在位置 j 出现了多少次. 然后我们可以把num[i] 看成一个264进制的数,于是我们对它进行排序,然后贪心即可.
代码:
#include<bits/stdc++.h>using namespace std;typedef long long LL;const int maxn = 1e5+300;const int mod = 1e9+7;int coe[30];struct ss{ string s; int id;}a[30];int num[30][maxn];bool vis[30];bool cmp(const ss &q, const ss &p){return q.s > p.s;}int main(){ int kase = 0; ios::sync_with_stdio(false); int n; while(cin >> n){ memset(coe,0,sizeof(coe)); memset(vis,false,sizeof(vis)); memset(num, 0,sizeof(num)); int maxlen = 0; for(int i = 0; i < n ;++i){ string s; cin>>s; int len = s.length(); maxlen = max(maxlen, len); if(len > 1) vis[s[0] - 'a'] = true;//标记首元素 for(int j = len - 1; j >= 0; --j) num[s[j]-'a'][len - j - 1]++;//统计字母出现的位置, }for(int i = 0; i < 30; ++i) for(int j = 0; j < maxlen + 20; ++j) if(num[i][j] >= 26){ num[i][j+1] += num[i][j] / 26;//进位 num[i][j] %= 26; }cout<<"Case #"<<++kase<<": "; for(int i = 0; i < 30; ++i){ string ss = ""; for(int j = maxlen + 20; j >= 0; --j) ss += num[i][j] + 'a'; a[i].s = ss; a[i].id = i; }sort(a,a+30,cmp);//将数字转换成字符串然后排序比较大小 bool flag = true; int tmp = 1; for(int i = 25; i >= 0; --i){//从大到小一次赋值 if(flag && !vis[a[i].id]){ coe[a[i].id] = 0; flag = false; }else coe[a[i].id] = tmp++; }LL ans = 0, tt; for(int i = 0; i < 30; ++i){ tt = 1; for(int j = 0;j < maxlen + 20; ++j){ ans = (ans + (num[a[i].id][j] * coe[a[i].id]) * tt % mod) % mod; tt = tt * 26 % mod; } }cout<<(ans % mod + mod ) % mod<<endl; }return 0;}
阅读全文
0 0
- HDU-6034 Balala Power!
- [HDU]-6034 Balala Power!
- HDU 6034 Balala Power!
- hdu 6034 Balala Power!
- 【HDU 6034 Balala Power!】
- hdu 6034 Balala Power!
- HDU 6034 Balala Power!
- HDU 6034 Balala Power!
- hdu-6034-Balala Power!
- HDU-6034 Balala Power!
- hdu-6034-Balala Power!
- HDU 6034 Balala Power!
- Balala Power! HDU
- HDU 6034 Balala Power!
- HDU-Balala Power!
- hdu 6034 Balala Power!
- Balala Power! HDU
- hdu 6034 Balala Power!(贪心)
- C++ 中通过GetAdaptersInfo获取网卡配置和Ip地址信息
- cmd net use 命令
- Notpad去除行尾空格
- 【opencv】错误提示OpenCV Error: Assertion failed <dims <=2 && data && <unsigned >i0 ...
- FZU 2271:Problem 2271 X <Floyd>
- Balala Power! HDU
- oracle case when 在sql中的使用
- eclipse环境 Java web项目的Tomcat配置
- 常见浏览器兼容性问题与解决方案
- C++ “error LNK1169: 找到一个或多个多重定义的符号”的解决方法
- Windows下配置环境变量和需不需要重启?
- 底部导航栏简单版
- Gradle学习记录
- springMVC入门增删改查理解