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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int matrica[9][9];
  6.  
  7. bool moze_broj(int red, int kolona, int broj)
  8. {
  9.     for (int x = 0; x < 9; x++)
  10.         if (matrica[red][x] == broj or matrica[x][kolona] == broj)
  11.             return false;
  12.     int pocetak_i = red - red % 3;
  13.     int pocetak_j = kolona - kolona % 3;
  14.     for (int i = 0; i < 3; i++)
  15.         for (int j = 0; j < 3; j++)
  16.             if (matrica[pocetak_i + i][pocetak_j + j] == broj)
  17.                 return false;
  18.     return true;
  19. }
  20.  
  21. bool sudoku()
  22. {
  23.     for (int i = 0; i < 9; i++)
  24.         for (int j = 0; j < 9; j++)
  25.             if (matrica[i][j] == 0)
  26.             {
  27.                 for (int broj = 1; broj < 10; broj ++)
  28.                     if (moze_broj(i, j, broj))
  29.                     {
  30.                         matrica[i][j] = broj;
  31.                         if (sudoku())
  32.                             return true;
  33.                         matrica[i][j] = 0;
  34.                     }
  35.                 //return false;
  36.             }
  37.     return true;
  38. }
  39.  
  40. int main()
  41. {
  42.     for (int i = 0; i < 9; i++)
  43.     {
  44.     	string linija;
  45.     	cin >> linija;
  46.     	for (int j = 0; j < 9; j++)
  47.     		matrica[i][j] = linija[j] - '0';
  48.     }
  49.     if (sudoku())
  50.         for (int i = 0; i < 9; i++)
  51.         {
  52.             for (int j = 0; j < 9; j++)
  53.                 cout << matrica[i][j];
  54.             cout << endl;
  55.         }
  56.     return 0;
  57. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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749030680
006508000
000760324
800057060
407000508
050980002
184076000
000403800
063010247
stdout
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749132685
216548790
508769324
821357469
437201508
650984132
184076953
972403816
063815247
https://ideone.com/qewS1u
language:
C++14 (gcc 8.3)
created:
3 hours ago
visibility:
public

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