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  1. #include<iostream>
  2. using namespace std;
  3. int main(){
  4.     int n;
  5.     cin>>n;
  6.     while( n != 0 ){
  7.         if ( n % 10 == 1) n /= 10 ;
  8.         else if(n%100 == 14) n/= 100; 
  9.         else if(n%1000 == 144) n/= 1000; 
  10.         else break;
  11.     }
  12.     if( n == 0 )cout<<"YES";
  13.     else cout<<"NO";
  14. }
Success #stdin #stdout 0s 15232KB
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stdin
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114114
stdout
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YES
https://ideone.com/W3tRtj
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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