摘要：
#include #include #include #include using namespace std;int main(){ long long n; cin >>n; while(n){ if(n%10 == 1) n/=10; else if(n%100 == 14 ) n/=100; else if(n%1000 == 144) n/=1000; else { cout<<"NO"<<endl;return 0;} } cout<<"YES"<<endl; return 0;} 阅读全文