#include #include #include using namespace std; string s; int to_n(char c) { return c - '0'; } int main() { cin >> s; reverse(s.begin(),s.end()); // 6 + 6 , 6 + 7 , 7 + 7 if(2 <= to_n(s[0]) && to_n(s[0]) <= 4) { } else { cout << "No" << endl; return 0; } int i = 1; for(;i < s.size();i++) { if(3 <= to_n(s[i]) && to_n(s[i]) <= 5) { } else { break; } } if(i == s.size() - 1 && (1 == to_n(s[i]))) { cout << "Yes" << endl; return 0; } if(i < s.size() && (7 == to_n(s[i]) || 8 == to_n(s[i]))) { i++; for(;i < s.size();i++) { if(6<= to_n(s[i]) && to_n(s[i]) <= 7) { } else { cout << "No" << endl; return 0; } } cout << "Yes" << endl; return 0; } cout << "No" << endl; return 0; }