#include #define show(x) std::cerr << #x << " = " << x << std::endl int main() { std::string s; std::cin >> s; const int sz = s.size(); std::vector p; for (const char c : s) { p.push_back(c - '0'); } std::reverse(p.begin(), p.end()); auto in = [](const int target, const int inf, const int sup) { return inf <= target and target <= sup; }; auto judge = [&]() { if (not in(p[0], 2, 4)) { return false; } int pos = 1; for (; pos < sz and in(p[pos], 3, 5); pos++) {} if (pos == sz) { return false; } if (p[pos] == 1) { return pos == sz - 1; } else if (not in(p[pos], 7, 8)) { return false; } pos++; for (; pos < sz and in(p[pos], 6, 7); pos++) {} return pos == sz; }; std::cout << (judge() ? "Yes" : "No") << std::endl; return 0; }