1235 학생 번호 문제풀이 #include #include #include #include using namespace std; void fast_io(void) { ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); } int main() { vector v; fast_io(); int n, res = 1; cin >> n; while (n--) { string str; cin >> str; reverse(str.begin(), str.end()); v.push_back(str); } while (true) { set s; for (int i = 0; i < v.size(); i++) { s.insert(v[i].substr(0, res..