Shenlin / leetcode-test

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eba2845b 1 parent e433cbfe

add new test case

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Showing 1 changed file with 37 additions and 34 deletions
......@@ -2,13 +2,13 @@
* @param {character[][]} board
* @return {void} Do not return anything, modify board in-place instead.
*/
var solveSudoku = function(board) {
var solveSudoku = function (board) {
let empty = {};
let rows = new Array(9).fill(void 0).map(()=>new Set());
let cols = new Array(9).fill(void 0).map(()=>new Set());
let blocks = new Array(9).fill(void 0).map(()=>new Set());
let rows = new Array(9).fill(void 0).map(() => new Set());
let cols = new Array(9).fill(void 0).map(() => new Set());
let blocks = new Array(9).fill(void 0).map(() => new Set());
for (let i=0;i<9;i++) {
for (let i = 0; i < 9; i++) {
for (let j = 0; j < 9; j++) {
let block = block_no(i, j);
let v = board[i][j];
......@@ -16,55 +16,53 @@ var solveSudoku = function(board) {
rows[i].add(v);
cols[j].add(v);
blocks[block].add(v);
mark({block, i, j}, v);
} else {
mark({block, i, j}, v);
}
mark({ block, i, j }, v);
}
}
function block_no(i, j) {
return (~~(i/3))*3 + ~~(j/3);
return (~~(i / 3)) * 3 + ~~(j / 3);
}
function mark({block, i, j}, v) {
for (let n=0;n<9;n++){
// not empty cell
function mark({ block, i, j }, v) {
for (let n = 0; n < 9; n++) {
// skip self if is not empty cell
if ((i === n || j === n) && v !== '.') {
if (empty[i+','+j]) {
delete empty[i+','+j];
if (empty[i + ',' + j]) {
delete empty[i + ',' + j];
}
continue;
}
// cols
if (board[i][n] === '.') {
let e = empty[i+','+n] = empty[i+','+n] || {block: block_no(i, n), i, j:n, maybe: new Set(['1','2','3','4','5','6','7','8','9'])};
e.maybe.delete(v);
let e = empty[i + ',' + n] = empty[i + ',' + n] || { block: block_no(i, n), i, j: n, maybe: new Set(['1', '2', '3', '4', '5', '6', '7', '8', '9']) };
e.maybe.has(v)&&e.maybe.delete(v);
if (!e.maybe.size) {
delete empty[i+','+n];
delete empty[i + ',' + n];
}
}
// rows
if (board[n][j] === '.') {
let e = empty[n+','+j] = empty[n+','+j] || {block: block_no(n, j), i:n, j, maybe: new Set(['1','2','3','4','5','6','7','8','9'])};
e.maybe.delete(v);
let e = empty[n + ',' + j] = empty[n + ',' + j] || { block: block_no(n, j), i: n, j, maybe: new Set(['1', '2', '3', '4', '5', '6', '7', '8', '9']) };
e.maybe.has(v)&&e.maybe.delete(v);
if (!e.maybe.size) {
delete empty[n+','+j];
delete empty[n + ',' + j];
}
}
// blocks
let bi = ~~(block/3);
let bi = ~~(block / 3);
let bj = block % 3;
for (let bn=0;bn<9;bn++) {
let i = bi*3 + ~~(bn/3);
let j = bj*3 + bn % 3;
for (let bn = 0; bn < 9; bn++) {
let i = bi * 3 + ~~(bn / 3);
let j = bj * 3 + bn % 3;
if (board[i][j] === '.') {
let e = empty[i+','+j] = empty[i+','+j] || {block: block_no(i, j), i, j, maybe: new Set(['1','2','3','4','5','6','7','8','9'])};
e.maybe.delete(v);
let e = empty[i + ',' + j] = empty[i + ',' + j] || { block: block_no(i, j), i, j, maybe: new Set(['1', '2', '3', '4', '5', '6', '7', '8', '9']) };
e.maybe.has(v)&&e.maybe.delete(v);
if (!e.maybe.size) {
delete empty[i+','+j];
delete empty[i + ',' + j];
}
}
}
......@@ -73,7 +71,7 @@ var solveSudoku = function(board) {
function fill(i, j, block, v) {
board[i][j] = v;
empty[i+','+j].value = v;
empty[i + ',' + j].value = v;
rows[i].add(v);
cols[j].add(v);
blocks[block].add(v);
......@@ -81,23 +79,25 @@ var solveSudoku = function(board) {
function unfill(i, j, block, v) {
board[i][j] = '.';
empty[i+','+j].value = void 0;
empty[i + ',' + j].value = void 0;
rows[i].delete(v);
cols[j].delete(v);
blocks[block].delete(v);
}
function deal() {
let blanks = Object.keys(empty).map(k=>empty[k]).filter(m=>!m.value).sort((a,b)=>{
// find empty cell order by maybe size
let blanks = Object.keys(empty).map(k => empty[k]).filter(e => !e.value).sort((a, b) => {
return a.maybe.size - b.maybe.size;
});
for (let e of blanks) {
let {block, i, j, value} = e;
if (value) {continue;}
let { block, i, j, value } = e;
if (value) { continue; } // maybe signed
let union = new Set([...rows[i], ...cols[j], ...blocks[block]]);
let maybe = new Set(['1','2','3','4','5','6','7','8','9'].filter(v=>!union.has(v)));
let maybe = new Set(['1', '2', '3', '4', '5', '6', '7', '8', '9'].filter(v => !union.has(v)));
// empty cell must has some maybe number
if (!maybe.size) {
return false;
}
......@@ -127,6 +127,9 @@ var solveSudoku = function(board) {
deal();
};
var sudoku = [["5","3",".",".","7",".",".",".","."],["6",".",".","1","9","5",".",".","."],[".","9","8",".",".",".",".","6","."],["8",".",".",".","6",".",".",".","3"],["4",".",".","8",".","3",".",".","1"],["7",".",".",".","2",".",".",".","6"],[".","6",".",".",".",".","2","8","."],[".",".",".","4","1","9",".",".","5"],[".",".",".",".","8",".",".","7","9"]];
// var sudoku = [["5", "3", ".", ".", "7", ".", ".", ".", "."], ["6", ".", ".", "1", "9", "5", ".", ".", "."], [".", "9", "8", ".", ".", ".", ".", "6", "."], ["8", ".", ".", ".", "6", ".", ".", ".", "3"], ["4", ".", ".", "8", ".", "3", ".", ".", "1"], ["7", ".", ".", ".", "2", ".", ".", ".", "6"], [".", "6", ".", ".", ".", ".", "2", "8", "."], [".", ".", ".", "4", "1", "9", ".", ".", "5"], [".", ".", ".", ".", "8", ".", ".", "7", "9"]];
var sudoku = [[".","6",".","5","9","3",".",".","."],["9",".","1",".",".",".","5",".","."],[".","3",".","4",".",".",".","9","."],["1",".","8",".","2",".",".",".","4"],["4",".",".","3",".","9",".",".","1"],["2",".",".",".","1",".","6",".","9"],[".","8",".",".",".","6",".","2","."],[".",".","4",".",".",".","8",".","7"],[".",".",".","7","8","5",".","1","."]];
console.time();
solveSudoku(sudoku);
console.info(sudoku);
console.timeEnd();
......