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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.  
  6. 	int X,y;
  7. 	cin >> X>>y;
  8. 	bool l = true;
  9. 	for (int i = X;i<=y;i++)
  10.  
  11. 	{bool ok = true;
  12.  
  13. 		for (int m = i;m ;m /= 10) {
  14. 			int last = m % 10;
  15.  
  16. 			if(last == 4 || last == 7){}
  17.  
  18. 			else { ok = false;
  19.  
  20. 			}
  21.  
  22. 		}
  23. 		if (ok == true) {
  24. 			cout << i << " ";
  25. 			l = false;
  26. 		}
  27.  
  28. 	}
  29. 	if (l == true) { cout << -1; }
  30.  
  31. 	return 0;
  32. }
Success #stdin #stdout 0.01s 5320KB
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stdin
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Standard input is empty
stdout
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-1
https://ideone.com/0jP91C
language:
C++ (gcc 8.3)
created:
19 days ago
visibility:
public

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