// Sudoku solution must satisfy all of the following rules:
// Each of the digits 1-9 must occur once in each row.
// Each of the digits 1-9 must occur once in each column.
// Each of the digits 1-9 must occur once in each 3x3 grid.
function isValidSudoku3x3Grid(grid: number[][]): boolean {
if (grid.length !== 3 || grid[0].length !== 3) {
return false; // Ensure it's a 3x3 grid
}
let seen: Set<number> = new Set();
for (let row of grid) {
for (let num of row) {
if (num < 1 || num > 9 || seen.has(num)) {
return false; // Invalid if number is out of range or repeated
}
seen.add(num);
}
}
return true; // Valid if all numbers 1-9 appear exactly once
}
const grid: number[][] = [
[5, 3, 4],
[6, 7, 2],
[1, 9, 8]
];
if (isValidSudoku3x3Grid(grid)) {
console.log("The grid is a valid Sudoku grid!");
} else {
console.log("The grid is NOT a valid Sudoku grid!");
}
/*
run:
"The grid is a valid Sudoku grid!"
*/
