[백준] 4659번 비밀번호 발음하기

https://www.acmicpc.net/problem/4659

4659번: 비밀번호 발음하기

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


int main() {
	while (true) {
		string s;
		cin >> s;
		if (s == "end") break;
		bool flag = false;
		int countVowel = 0;
		vector<bool> isVowel(s.size());
		
		if (s[0] == 'a' || s[0] == 'e' || s[0] == 'i' || s[0] == 'o' || s[0] == 'u') {
			countVowel++;
			isVowel[0] = true;
		}
		for (int i = 1; i < s.size(); i++) {
			if (s[i] != 'e' && s[i] != 'o' && s[i - 1] == s[i]) {
				flag = true;
				break;
			}
			if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' || s[i] == 'u') {
				countVowel++;
				isVowel[i] = true;
			}
		}
		if (flag || countVowel == 0) {
			cout << '<' << s << "> is not acceptable.\n";
			continue;
		}
		for (int i = 2; i < s.size(); i++) {
			if (isVowel[i - 2] == isVowel[i - 1] && isVowel[i - 1] == isVowel[i]) {
				flag = true;
				break;
			}
		}
		if(flag) cout << '<' << s << "> is not acceptable.\n";
		else cout << '<' << s << "> is acceptable.\n";
	}
	return 0;
}