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  1. // Sudoku
  2. #include <iostream>
  3.  
  4. using namespace std;
  5.  
  6. int matrica[9][9];
  7.  
  8. bool moze_broj(int red, int kolona, int broj)
  9. {
  10.     for (int x = 0; x < 9; x++)
  11.         if (matrica[red][x] == broj or matrica[x][kolona] == broj)
  12.             return false;
  13.     int pocetak_i = red - red % 3;
  14.     int pocetak_j = kolona - kolona % 3;
  15.     for (int i = 0; i < 3; i++)
  16.         for (int j = 0; j < 3; j++)
  17.             if (matrica[pocetak_i + i][pocetak_j + j] == broj)
  18.                 return false;
  19.     return true;
  20. }
  21.  
  22. bool sudoku()
  23. {
  24.     for (int i = 0; i < 9; i++)
  25.         for (int j = 0; j < 9; j++)
  26.             if (matrica[i][j] == 0)
  27.             {
  28.                 for (int broj = 1; broj < 10; broj ++)
  29.                     if (moze_broj(i, j, broj))
  30.                     {
  31.                         matrica[i][j] = broj;
  32.                         if (sudoku())
  33.                             return true;
  34.                         matrica[i][j] = 0;
  35.                     }
  36.                 return false;
  37.             }
  38.     return true;
  39. }
  40.  
  41. int main()
  42. {
  43.     for (int i = 0; i < 9; i++)
  44.     {
  45.     	string linija;
  46.     	cin >> linija;
  47.     	for (int j = 0; j < 9; j++)
  48.     		matrica[i][j] = linija[j] - '0';
  49.     }
  50.     if (sudoku())
  51.         for (int i = 0; i < 9; i++)
  52.         {
  53.             for (int j = 0; j < 9; j++)
  54.                 cout << matrica[i][j];
  55.             cout << endl;
  56.         }
  57.     return 0;
  58. }
Success #stdin #stdout 0.01s 5292KB
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stdin
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Standard input is empty
stdout
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-48-48-48-48-48-48-48-48-46
-48-48-48-48-48-48-48-48-46
-48-48-48-48-48-48-48-48-46
-48-48-48-48-48-48-48-48-46
-48-48-48-48-48-48-48-48-46
-48-48-48-48-48-48-48-48-46
-48-48-48-48-48-48-48-48-46
-48-48-48-48-48-48-48-48-46
-48-48-48-48-48-48-48-48-46
https://ideone.com/NMGESH
language:
C++14 (gcc 8.3)
created:
8 hours ago
visibility:
public

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