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  1. #include <bits/stdc++.h>
  2. #define int long long int
  3. using namespace std;
  4.  
  5. signed main(){
  6.     set<int> sett;
  7.     set<int>::iterator it;
  8.     for(int i=2;i<=100;i++){
  9.         int bit=1;
  10.         string str;
  11.         while(bit<=i){
  12.             if(i & bit){
  13.                 str.push_back('4');
  14.             }
  15.             else{
  16.                 str.push_back('0');
  17.             }
  18.             bit=bit<<1;
  19.         }
  20.         reverse(str.begin(), str.end());
  21.         sett.insert(stoi(str));
  22.     }
  23.  
  24.     int x;
  25.     cin>>x;
  26.     for(it=sett.begin();it!=sett.end();it++){
  27.         if(*it >= x){
  28.             if(*it % x == 0){
  29.                 cout<<*it<<"\n";
  30.                 break;
  31.             }
  32.         }
  33.     }
  34.  
  35. }
  36.  
Success #stdin #stdout 0s 4508KB
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stdout
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https://ideone.com/Uvqvqf
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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