杭电5842之Lweb and String

Problem Description

Lweb has a string S.

Oneday, he decided to transform this string to a new sequence.

You need help him determine this transformation to get a sequence which has the longest LIS(Strictly Increasing).

You need transform every letter in this string to a new number.

A is the set of letters of S,B is the set of natural numbers.

Every injection f:A→B can be treat as an legal transformation.

For example, a String “aabc”, A={a,b,c}, and you can transform it to “1 1 2 3”, and the LIS of the new sequence is 3.

Now help Lweb, find the longest LIS which you can obtain from S.

LIS: Longest Increasing Subsequence. (https://en.wikipedia.org/wiki/Longest_increasing_subsequence)

 

Input

The first line of the input contains the only integer T,(1≤T≤20).

Then T lines follow, the i-th line contains a string S only containing the lowercase letters, the length of S will not exceed 105.

 

Output

For each test case, output a single line "Case #x: y", where x is the case number, starting from 1. And y is the answer.

 

Sample Input

2
aabcc
acdeaa

 

Sample Output

Case #1: 3
Case #2: 4

题意：智障题，统计一个只含小写字母的字符串里有多少种不同的字符

AC代码如下：

#include<iostream>
#include <string>
using namespace std;
int main()
{	
	int t,i;
	int n;
	int num;
	int a[26];
	int k = 1;
	string s;
	cin >> t;
	while (t--)
	{
		for (i = 0; i < 26; i++)
		{
			a[i] = 1;
		}
		num = 0;
		cin >> s;
		n = s.size();
		for (i = 0; i < n; i++)
		{
			if (a[int(s[i]) - 'a'])
			{
				a[s[i] - 'a'] = 0;
				num++;
			}
		}
		cout<< "Case #"<<k++<<": "<< num << endl;
	}
    return 0;
}