Add comprehensive LeetCode solutions index documentation

src/exercises/36.valid-sudoku.py

@@ -0,0 +1,98 @@
+from string import *
+from re import *
+from datetime import *
+from collections import *
+from heapq import *
+from bisect import *
+from copy import *
+from math import *
+from random import *
+from statistics import *
+from itertools import *
+from functools import *
+from operator import *
+from io import *
+from sys import *
+from json import *
+from builtins import *
+import string
+import re
+import datetime
+import collections
+import heapq
+import bisect
+import copy
+import math
+import random
+import statistics
+import itertools
+import functools
+import operator
+import io
+import sys
+import json
+from typing import *
+
+
+# @leet start
+class Solution:
+    def isValidSudoku(self, board: List[List[str]]) -> bool:
+        rows = [{} for _ in range(len(board))]
+        square = [{} for _ in range(len(board))]
+        for i in range(len(board)):
+            cols = {}
+            for j in range(len(board[i])):
+                val = board[i][j]
+                if val != ".":
+                    if val in cols:
+                        return False
+                    cols[val] = j
+                    if val in rows[j]:
+                        return False
+                    rows[j][val] = i
+                    if i < 3:
+                        if j < 3:
+                            if val in square[0]:
+                                return False
+                            square[0][val] = i
+                        elif j > 2 and j < 6:
+                            if val in square[1]:
+                                return False
+                            square[1][val] = i
+                        elif j > 5:
+                            if val in square[2]:
+                                return False
+                            square[2][val] = i
+                    elif i > 2 and i < 6:
+                        if j < 3:
+                            if val in square[3]:
+                                return False
+                            square[3][val] = i
+                        elif j > 2 and j < 6:
+                            if val in square[4]:
+                                return False
+                            square[4][val] = i
+                        elif j > 5:
+                            if val in square[5]:
+                                return False
+                            square[5][val] = i
+                    elif i > 5:
+                        if j < 3:
+                            if val in square[6]:
+                                return False
+                            square[6][val] = i
+                        elif j > 2 and j < 6:
+                            if val in square[7]:
+                                return False
+                            square[7][val] = i
+                        elif j > 5:
+                            if val in square[8]:
+                                return False
+                            square[8][val] = i
+
+
+        return True
+
+
+# @leet end
+