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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. bool isValidSudoku3x3(vector<vector<int>> &grid) {
  5.     unordered_set<int> seen;
  6.     for (int i = 0; i < 3; i++) {
  7.         for (int j = 0; j < 3; j++) {
  8.             if (grid[i][j] < 1 || grid[i][j] > 9) return false; // Check range
  9.             if (seen.count(grid[i][j])) return false; // Check duplicates
  10.             seen.insert(grid[i][j]);
  11.         }
  12.     }
  13.     return true;
  14. }
  15.  
  16. int main() {
  17.     vector<vector<int>> grid(3, vector<int>(3));
  18.     for (int i = 0; i < 3; i++)
  19.         for (int j = 0; j < 3; j++)
  20.             cin >> grid[i][j];
  21.  
  22.     cout << (isValidSudoku3x3(grid) ? "false" : "true") << endl;
  23.     return 0;
  24. }
  25.  
Success #stdin #stdout 0s 5284KB
comments (?)
stdin
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[[1,0,2],
[4,2,6],
[7,8,9]]
stdout
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true
https://ideone.com/DmDdF9
language:
C++14 (gcc 8.3)
created:
5 days ago
visibility:
public

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