google code jam kickstart 2017 practice a country leader

• Problem
• Input and Output
• Limits
• Code

Problem

The Constitution of a certain country states that the leader is the person with the name containing the greatest number of different alphabet letters. (The country uses the uppercase English alphabet from A through Z.) For example, the name GOOGLE has four different alphabet letters: E, G, L, and O. The name APAC CODE JAM has eight different letters. If the country only consists of these 2 persons, APAC CODE JAM would be the leader.

If there is a tie, the person whose name comes earliest in alphabetical order is the leader.

Given a list of names of the citizens of the country, can you determine who the leader is?
Input

The first line of the input gives the number of test cases, T. T test cases follow. Each test case starts with a line with an interger N, the number of people in the country. Then N lines follow. The i-th line represents the name of the i-th person. Each name contains at most 20 characters and contains at least one alphabet letter.

Input and Output

Output

For each test case, output one line containing Case #x: y, where x is the test case number (starting from 1) and y is the name of the leader.

Limits

1 ≤ T ≤ 100.

1 ≤ N ≤ 100.

Small dataset

Each name consists of at most 20 characters and only consists of the uppercase English letters A through Z.

Large dataset

Each name consists of at most 20 characters and only consists of the uppercase English letters A through Z and ‘ ‘(space).

All names start and end with alphabet letters.

Sample

Input

2
3
ADAM
BOB
JOHNSON
2
A AB C
DEF

Output

Case #1: JOHNSON
Case #2: A AB C

In sample case #1, JOHNSON contains 5 different alphabet letters(‘H’, ‘J’, ‘N’, ‘O’, ‘S’), so he is the leader.

Sample case #2 would only appear in Large data set. The name DEF contains 3 different alphabet letters, the name A AB C also contains 3 different alphabet letters. A AB C comes alphabetically earlier so he is the leader.

Code

#include <iostream>
#include <vector>
#include <algorithm>
#include <set>

using namespace std;

int main() {
    freopen("E:/A-large-practice.in","r",stdin);
    freopen("E:/A-large-practice.out","w",stdout);
    int T, N;
    string s;
    cin >> T;
    for (int i = 0; i < T; i++) {
        cout << "Case #" << i + 1 << ": ";
        cin >> N;
        int count = 0;
        string res = "";
        for (int j = 0; j <= N; j++) {
            getline(cin, s);
            set<char> charS;
            for (char c: s)
                if (isalpha(c))
                    charS.insert(c);
            if (charS.size() > count) {
                count = charS.size();
                res = s;
            } else if (charS.size() == count) {
                if (s.compare(res) < 0)
                    res = s;
            }
        }
        cout << res << endl;
    }
    return 0;
}