HashTables - Validate-Sudoku

[nirmit-sawhney]

Checklist

• Solution is tested on sphere engine
  Note: Please copy only the solution part. Do not copy/paste the template code. That way, any issues with template code can be caught early on.
  • [ ] Author
  • [ ] Reviewer
• PR title is correct - PR title conventions
  • [ ] Author
  • [ ] Reviewer
• Folder/File naming is correct - Naming conventions
  • [ ] Author
  • [ ] Reviewer
• Coding conventions are followed - Coding conventions
  • [ ] Author
  • [ ] Reviewer
• Test cases (action item for reviewer)
  
  • To be ensured by checking the problem on sphere-engine
  • If any test cases are missing, please add them - how to add new test cases
  • [ ] There are at least 2 test cases
  • [ ] There is at least 1 test case that is different from the sample test cases