Leetcode 36 Valid Sudoku | Deducing the formula

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Leetcode 36. Valid Sudoku Hindi
36. Valid Sudoku Leetcode Hindi
Leetcode 36. Valid Sudoku
36. Valid Sudoku
Valid Sudoku leetcode
leetcode Valid Sudoku

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leetcode 1091 Shortest Path in Binary Matrix:
Given an n x n binary matrix grid, return the length of the shortest clear path in the matrix. If there is no clear path, return -1.

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Please like, comment and subscribe !! Dont forget to subscribe !!

Think_Code
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Hi, I have one doubt. Is scaler academy worth it? what do you think as microsoft Engineer?? the salesmen are after me and even im confused.

sharathkumar
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I don't understand why you need three loops to do the same thing.
Instead combine everything into a single loop.
BTW, Nice video and your explanation is lit.
Can we connect on linkedin. What's the username there?

class Solution {
public:
bool board) {
vector<unordered_map<char, int>> row(9);
vector<unordered_map<char, int>> col(9);
vector<unordered_map<char, int>> box(9);

for(int i=0; i<9; i++) {
for(int j=0; j<9; j++) {
if(board[i][j] != '.') {
row[i][board[i][j]]++;
col[j][board[i][j]]++;
int k = (i/3)*3 + j/3;
box[k][board[i][j]]++;

if(row[i][board[i][j]] > 1)
return false;
if(col[j][board[i][j]] > 1)
return false;
if(box[k][board[i][j]] > 1)
return false;
}
}
}

return true;
}
};

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