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  1. #include <iostream>
  2. #include <string>
  3.  
  4. using namespace std;
  5.  
  6. void fast_io(){
  7.     ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
  8.     #ifndef ONLINE_JUDGE
  9.         //freopen("input.txt", "r", stdin);
  10.     #endif
  11. }
  12.  
  13. int main()
  14. {
  15.     fast_io();
  16.     int num;
  17.     cin >> num;
  18.     int temp = num;
  19.     int counter = 0;
  20.     int digits = 0;
  21.     while (temp > 0){
  22.         temp /= 10;
  23.         digits++;
  24.     }
  25.     temp = num;
  26.     while (temp > 0){
  27.         if (temp%10 == 4 || temp%10 == 7 ){
  28.             temp /= 10;
  29.             counter++;
  30.         }else{
  31.             break;
  32.         }
  33.     }
  34.     if (counter == digits){
  35.         cout << "YES";
  36.     }else{
  37.         if (num%7 == 0 || num%4 == 0){
  38.             cout << "YES";
  39.         }else{
  40.             cout << "NO";
  41.         }
  42.     }
  43.  
  44. }
Success #stdin #stdout 0.01s 5292KB
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stdin
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47
stdout
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YES
https://ideone.com/sk2zWI
language:
C++ (gcc 8.3)
created:
22 days ago
visibility:
public

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