From f7781471c7139b9cfaaa9a47ee15d5cf706690b2 Mon Sep 17 00:00:00 2001
From: Tahir <83111631+Tahirc1@users.noreply.github.com>
Date: Mon, 28 Oct 2024 13:49:43 +0530
Subject: [PATCH] Update 36. Valid Sudoku.js

adding explanation to problem 36
---
 31-40/36. Valid Sudoku.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/31-40/36. Valid Sudoku.js b/31-40/36. Valid Sudoku.js
index ffd9ba4..3f29c7c 100644
--- a/31-40/36. Valid Sudoku.js	
+++ b/31-40/36. Valid Sudoku.js	
@@ -1,23 +1,29 @@
 var isValidSudoku = function(board) {
+    // create variable to store row , col and box values
     let row = []
     let col = []
     let box = []
+    // loop i over 0-8
     for (let i = 0; i <= 8; i++){
+        // loop j over 0-8
         for (let j = 0; j <= 8; j++){
+            // this will help us get position of each cell from board
             let IndI = 3*Math.floor(i/3) + Math.floor(j/3)
             let IndJ = 3*(i % 3) + (j % 3)
+            // check if value is already in row , col or box and return false
             if (row.indexOf(board[i][j]) !=  -1 ){return false} 
             if (col.indexOf(board[j][i]) !=  -1 ){return false}
             if (box.indexOf(board[IndI][IndJ]) !=  -1){return false}
-
+            // if not then add value to row , col and box
             if(board[i][j] != '.'){row.push(board[i][j])}
             if(board[j][i] != '.'){col.push(board[j][i])}
             if(board[IndI][IndJ] != '.'){box.push(board[IndI][IndJ])}
         }
+        // reset row , col and box array
         row = []
         col = []
         box = []
     }
     
     return true
-}
\ No newline at end of file
+}