Sudoku Solver

Given a 9x9 Sudoku board, your task is to fill the empty slots and return the completed Sudoku solution.

A Sudoku is a grid composed of nine 3x3 smaller grids. The challenge is to fill in the numbers from 1 to 9 such that each digit appears only once per row, column, and 3x3 grid.

Input:

N = 9 The next nine lines represent the Sudoku grid, where each line contains 9 space-separated integers.

Note: Empty slots in the input are represented by the number 0.

Output:

Return the complete solved Sudoku grid.

Example:

Given Sudoku Puzzle:

The task is to fill the empty slots satisfying the Sudoku constraints.

Solved Sudoku:

Constraints:

The size of the grid is fixed, N = 9.

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Question

Sudoku Solver

Given a 9x9 Sudoku board, your task is to fill the empty slots and return the completed Sudoku solution.

A Sudoku is a grid composed of nine 3x3 smaller grids. The challenge is to fill in the numbers from 1 to 9 such that each digit appears only once per row, column, and 3x3 grid.

Input:

N = 9 
The next nine lines represent the Sudoku grid, where each line contains 9 space-separated integers.

Note: Empty slots in the input are represented by the number 0.

Output:

Return the complete solved Sudoku grid.

Example:

Given Sudoku Puzzle:

example1

The task is to fill the empty slots satisfying the Sudoku constraints.

Solved Sudoku:

example1

Constraints:

The size of the grid is fixed, N = 9.
0 <= ARR[i][j] <= 9
Time Limit: 1 second

Note:

You do not need to print anything. The system will verify your solution by checking if the solution is correct or not.

Accepted Answer

Implement a Sudoku solver to fill empty slots in a 9x9 grid with numbers 1-9 satisfying constraints.

Create a recursive function to solve the Sudoku puzzle by trying out different numbers in empty slots.
Use backtracking to backtrack and try a different number if a conflict is encountered.
Ensure each number appears only once per row, column, and 3x3 grid.
Return the completed Sudoku grid as the output.