ACM-ICPC-OJ训练营

问题 1787 --Balala Power!

1787: Balala Power!

时间限制: 4 Sec 内存限制: 128 MB
提交: 62 解决: 26
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题目描述

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 109+7.

输入描述

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|≤106)

输出描述

For each test case, output "Case #x: y" in one line (without quotes), where

x indicates the case number starting from

1 and

y denotes the answer of corresponding case.

样例输入

1
a
2
aa
bb
3
a
ba
abc

样例输出

Case #1: 25
Case #2: 1323
Case #3: 18221

来源

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