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  1. #include <iostream>
  2. #include <cstdio>
  3. using namespace std;
  4.  
  5.     int main() {
  6.         ios_base::sync_with_stdio(false);
  7.         cin.tie(nullptr);
  8. #ifndef ONLINE_JUDGE
  9.     freopen("input.txt", "r", stdin);
  10.     freopen("output.txt", "w", stdout);
  11. #endif
  12. int x,y;
  13.         cin>>x>>y;
  14.         bool found=false;
  15.         for(int i=x;i<=y;i++) {
  16. bool c=true;
  17.             int a=i;
  18.  int b=i;
  19.             while (b!=0) {
  20.                 a=b%10;
  21.                 b/=10;
  22.                 if (a==4||a==7){
  23.                     c=true;
  24.             }
  25. else {
  26.     c=false;
  27.     break;
  28. }
  29.             }
  30.  
  31. if(c==true) {
  32.     cout<<i<<" ";
  33.     found=true;
  34. }
  35.         }
  36.         if (found==false) {
  37.             cout<<-1<<endl;
  38.         }
  39.         return 0;}
Success #stdin #stdout 1.64s 5348KB
comments (?)
stdin 
Standard input is empty
stdout 
0 4 7 44 47 74 77 444 447 474 477 744 747 774 777 4444 4447 4474 4477 4744 4747 4774 4777 7444 7447 7474 7477 7744 7747 7774 7777
https://ideone.com/RVOX77
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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