#include #include #include #include #include #include #include #include using namespace std; using ll = long long; #define rep(i, j, n) for (int i = j; i < (n); ++i) #define rrep(i, j, n) for (int i = (n)-1; j <= i; --i) #define all(a) a.begin(), a.end() template std::ostream &operator<<(std::ostream &os, std::vector &a) { for (size_t i = 0; i < a.size(); ++i) os << (i > 0 ? " " : "") << a[i]; return os << '\n'; } template std::istream &operator>>(std::istream &is, std::vector &a) { for (T &x : a) { is >> x; } return is; } [[maybe_unused]] static constexpr long long MOD = 998244353; [[maybe_unused]] static constexpr int INF = 0x3f3f3f3f; [[maybe_unused]] static constexpr long long INFL = 0x3f3f3f3f3f3f3f3fLL; int main() { cin.tie(0)->sync_with_stdio(0); string s; cin >> s; int n = (int)s.size(); int cnt = 0; rep(i, 0, n) { if (s[i] == '1') { ++cnt; int j = i; while (i + 1 < n && s[i + 1] == '1') ++i; cnt += j != i; } } cout << (cnt == 2 ? "Yes" : "No"); }