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  1. #include <algorithm>
  2. #include <iostream>
  3. #include <iterator>
  4.  
  5. template <typename T> bool w(T begin, T end)
  6. {
  7.     while(begin != end) {
  8.         end--;
  9.         if(*end != 3) {
  10.             ++*end;
  11.             return true;
  12.         } else
  13.             *end = 0;
  14.     }
  15.     return false;
  16. }
  17.  
  18. int main()
  19. {
  20.     int a[4] {};
  21.  
  22.     do
  23.     {
  24.         std::copy(std::begin(a), std::end(a), std::ostream_iterator<int>(std::cout, " "));
  25.         std::cout << std::endl;
  26.     } while (w(std::begin(a), std::end(a)));
  27. }
  28.  
Success #stdin #stdout 0s 3296KB
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stdin
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Standard input is empty
stdout
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0 0 0 0 
0 0 0 1 
0 0 0 2 
0 0 0 3 
0 0 1 0 
0 0 1 1 
0 0 1 2 
0 0 1 3 
0 0 2 0 
0 0 2 1 
0 0 2 2 
0 0 2 3 
0 0 3 0 
0 0 3 1 
0 0 3 2 
0 0 3 3 
0 1 0 0 
0 1 0 1 
0 1 0 2 
0 1 0 3 
0 1 1 0 
0 1 1 1 
0 1 1 2 
0 1 1 3 
0 1 2 0 
0 1 2 1 
0 1 2 2 
0 1 2 3 
0 1 3 0 
0 1 3 1 
0 1 3 2 
0 1 3 3 
0 2 0 0 
0 2 0 1 
0 2 0 2 
0 2 0 3 
0 2 1 0 
0 2 1 1 
0 2 1 2 
0 2 1 3 
0 2 2 0 
0 2 2 1 
0 2 2 2 
0 2 2 3 
0 2 3 0 
0 2 3 1 
0 2 3 2 
0 2 3 3 
0 3 0 0 
0 3 0 1 
0 3 0 2 
0 3 0 3 
0 3 1 0 
0 3 1 1 
0 3 1 2 
0 3 1 3 
0 3 2 0 
0 3 2 1 
0 3 2 2 
0 3 2 3 
0 3 3 0 
0 3 3 1 
0 3 3 2 
0 3 3 3 
1 0 0 0 
1 0 0 1 
1 0 0 2 
1 0 0 3 
1 0 1 0 
1 0 1 1 
1 0 1 2 
1 0 1 3 
1 0 2 0 
1 0 2 1 
1 0 2 2 
1 0 2 3 
1 0 3 0 
1 0 3 1 
1 0 3 2 
1 0 3 3 
1 1 0 0 
1 1 0 1 
1 1 0 2 
1 1 0 3 
1 1 1 0 
1 1 1 1 
1 1 1 2 
1 1 1 3 
1 1 2 0 
1 1 2 1 
1 1 2 2 
1 1 2 3 
1 1 3 0 
1 1 3 1 
1 1 3 2 
1 1 3 3 
1 2 0 0 
1 2 0 1 
1 2 0 2 
1 2 0 3 
1 2 1 0 
1 2 1 1 
1 2 1 2 
1 2 1 3 
1 2 2 0 
1 2 2 1 
1 2 2 2 
1 2 2 3 
1 2 3 0 
1 2 3 1 
1 2 3 2 
1 2 3 3 
1 3 0 0 
1 3 0 1 
1 3 0 2 
1 3 0 3 
1 3 1 0 
1 3 1 1 
1 3 1 2 
1 3 1 3 
1 3 2 0 
1 3 2 1 
1 3 2 2 
1 3 2 3 
1 3 3 0 
1 3 3 1 
1 3 3 2 
1 3 3 3 
2 0 0 0 
2 0 0 1 
2 0 0 2 
2 0 0 3 
2 0 1 0 
2 0 1 1 
2 0 1 2 
2 0 1 3 
2 0 2 0 
2 0 2 1 
2 0 2 2 
2 0 2 3 
2 0 3 0 
2 0 3 1 
2 0 3 2 
2 0 3 3 
2 1 0 0 
2 1 0 1 
2 1 0 2 
2 1 0 3 
2 1 1 0 
2 1 1 1 
2 1 1 2 
2 1 1 3 
2 1 2 0 
2 1 2 1 
2 1 2 2 
2 1 2 3 
2 1 3 0 
2 1 3 1 
2 1 3 2 
2 1 3 3 
2 2 0 0 
2 2 0 1 
2 2 0 2 
2 2 0 3 
2 2 1 0 
2 2 1 1 
2 2 1 2 
2 2 1 3 
2 2 2 0 
2 2 2 1 
2 2 2 2 
2 2 2 3 
2 2 3 0 
2 2 3 1 
2 2 3 2 
2 2 3 3 
2 3 0 0 
2 3 0 1 
2 3 0 2 
2 3 0 3 
2 3 1 0 
2 3 1 1 
2 3 1 2 
2 3 1 3 
2 3 2 0 
2 3 2 1 
2 3 2 2 
2 3 2 3 
2 3 3 0 
2 3 3 1 
2 3 3 2 
2 3 3 3 
3 0 0 0 
3 0 0 1 
3 0 0 2 
3 0 0 3 
3 0 1 0 
3 0 1 1 
3 0 1 2 
3 0 1 3 
3 0 2 0 
3 0 2 1 
3 0 2 2 
3 0 2 3 
3 0 3 0 
3 0 3 1 
3 0 3 2 
3 0 3 3 
3 1 0 0 
3 1 0 1 
3 1 0 2 
3 1 0 3 
3 1 1 0 
3 1 1 1 
3 1 1 2 
3 1 1 3 
3 1 2 0 
3 1 2 1 
3 1 2 2 
3 1 2 3 
3 1 3 0 
3 1 3 1 
3 1 3 2 
3 1 3 3 
3 2 0 0 
3 2 0 1 
3 2 0 2 
3 2 0 3 
3 2 1 0 
3 2 1 1 
3 2 1 2 
3 2 1 3 
3 2 2 0 
3 2 2 1 
3 2 2 2 
3 2 2 3 
3 2 3 0 
3 2 3 1 
3 2 3 2 
3 2 3 3 
3 3 0 0 
3 3 0 1 
3 3 0 2 
3 3 0 3 
3 3 1 0 
3 3 1 1 
3 3 1 2 
3 3 1 3 
3 3 2 0 
3 3 2 1 
3 3 2 2 
3 3 2 3 
3 3 3 0 
3 3 3 1 
3 3 3 2 
3 3 3 3
https://ideone.com/Pd3SPp
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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