Problem 1934. GJam 2014 China Rd B: Sudoku Checker

This Challenge is derived from GJam 2014 China Sudoku. Large Case.

The Goal is determine if the Sudoku square is valid. Each row and column must contain 1:N, for an NxN matix. Nroot=N^.5. Each NrootxNroot block must contain 1:N where blocks start at [1,1+Nroot,...] in Row/Col.

Input: [M], NxN matrix (3^2<=N<=6^2)

Output: TF, 1=Valid, 0=Invalid

Examples:

TF=1
5 3 4 6 7 8 9 1 2
6 7 2 1 9 5 3 4 8
1 9 8 3 4 2 5 6 7
8 5 9 7 6 1 4 2 3
4 2 6 8 5 3 7 9 1
7 1 3 9 2 4 8 5 6
9 6 1 5 3 7 2 8 4
2 8 7 4 1 9 6 3 5
3 4 5 2 8 6 1 7 9
TF=0
5 3 4 6 7 8 9 1 2
6 7 2 1 9 5 3 4 8
1 9 8 3 4 2 5 6 7
8 5 9 7 6 1 4 2 3
4 2 6 8 999 3 7 9 1
7 1 3 9 2 4 8 5 6
9 6 1 5 3 7 2 8 4
2 8 7 4 1 9 6 3 5
3 4 5 2 8 6 1 7 9

Contest Performance: Best Delta Time of 7 minutes with 1146 of 2010 able to process the large data set.

Solution Stats

51.45% Correct | 48.55% Incorrect
Last Solution submitted on Mar 23, 2024

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers60

Suggested Problems

More from this Author308

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!