Sanalista

#include <iostream>
#include <string>
using namespace std;

int main()
{
    string valid_characters = "abcdefghijklmnopqrstuwvxyzåäö";

    int words_amount;
    int wweaol = 0;
    cin >> words_amount;

    for (int i=0; i<words_amount; i++) {
        string current_word;
        cin >> current_word;

        if (words_amount > 1000 || current_word.length() > 30) {
            break;
        }

        bool even_amount = false;

        if (current_word.length() % 2 == 0) {
            for (unsigned int j=0; j<current_word.length(); j++) {
                char current_character = current_word[j];
                int chars_found = 0;

                for (unsigned int k=j++; k<current_word.length(); k++) {
                    if (current_word[k] == current_character) {
                        chars_found++;
                    }
                }

                if (chars_found % 2 == 0) {
                    even_amount = true;
                }
            }

            if (even_amount) {
                wweaol++;
            }
        }
    }

    cout << wweaol << endl;
    return 0;
}

Test 1

Verdict: WRONG ANSWER

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: WRONG ANSWER