#include <iostream> #include <cstdio> #include <string> #include <vector> #include <queue> #include <algorithm> using namespace std; using ll = long long; bool is_vowel(char c) { const vector<char> vowels = {'a', 'e', 'i', 'o', 'u', 'y'}; for (auto vowel : vowels) { if (c == vowel) { return true; } } return false; } ll count_bad_subwords(const string& s) { int n = s.size(); vector<int> letter_type(n); for (int i = 0; i < n; ++i) { letter_type[i] = is_vowel(s[i]); } deque<int> bad_triples; for (int i = 0; i+2 < n; ++i) { if (letter_type[i] == letter_type[i+1] and letter_type[i+1] == letter_type[i+2]) { bad_triples.push_back(i); } } ll res = 0; for (int i = 0; i < n and !bad_triples.empty(); ++i) { auto triple_start = bad_triples.front(); auto triple_end = triple_start+2; res += n-triple_end; if (triple_start == i) { bad_triples.pop_front(); } } return res; } int main() { ios_base::sync_with_stdio(0); string s; cin >> s; auto res = count_bad_subwords(s); cout << res << endl; return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | #include <iostream> #include <cstdio> #include <string> #include <vector> #include <queue> #include <algorithm> using namespace std; using ll = long long; bool is_vowel(char c) { const vector<char> vowels = {'a', 'e', 'i', 'o', 'u', 'y'}; for (auto vowel : vowels) { if (c == vowel) { return true; } } return false; } ll count_bad_subwords(const string& s) { int n = s.size(); vector<int> letter_type(n); for (int i = 0; i < n; ++i) { letter_type[i] = is_vowel(s[i]); } deque<int> bad_triples; for (int i = 0; i+2 < n; ++i) { if (letter_type[i] == letter_type[i+1] and letter_type[i+1] == letter_type[i+2]) { bad_triples.push_back(i); } } ll res = 0; for (int i = 0; i < n and !bad_triples.empty(); ++i) { auto triple_start = bad_triples.front(); auto triple_end = triple_start+2; res += n-triple_end; if (triple_start == i) { bad_triples.pop_front(); } } return res; } int main() { ios_base::sync_with_stdio(0); string s; cin >> s; auto res = count_bad_subwords(s); cout << res << endl; return 0; } |