43 lines
922 B
C++
43 lines
922 B
C++
#include <algorithm>
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#include <iostream>
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#include <string>
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// Check if a string is nice:
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// Nice strings have:
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// >=3 vowels
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// At least one double letter
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// No instances of 'ab', 'cd', 'pq', or 'xy'.
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auto is_nice(std::string const& s) noexcept -> bool
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{
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unsigned vowel_count = 0;
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bool repeated = false;
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char last = '\0';
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std::string vowels("aeiou");
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for (auto c : s) {
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if (vowels.find(c) != std::string::npos) {
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++vowel_count;
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}
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if (c == last) {
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repeated = true;
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}
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if ((last == 'a' && c == 'b') || (last == 'c' && c == 'd') || (last == 'p' && c == 'q') ||
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(last == 'x' && c == 'y')) {
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return false;
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}
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last = c;
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}
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return repeated && vowel_count >= 3;
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}
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auto main() -> int
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{
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unsigned nice_strings;
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for (std::string line; std::getline(std::cin, line);) {
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nice_strings += is_nice(line);
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}
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std::cout << nice_strings << '\n';
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return 0;
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} |