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solution.cpp 693 Bytes
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默然 authored 7 years ago . update all algorithms.
class Solution
{
public:
bool isValidSudoku(vector<vector<char> > &board)
{
vector<vector<bool> > rows(9, vector<bool>(9,false));
vector<vector<bool> > cols(9, vector<bool>(9,false));
vector<vector<bool> > blocks(9, vector<bool>(9,false));
for(int i = 0; i < 9; i++)
for(int j = 0; j < 9; j++)
{
if(board[i][j] == '.')continue;
int num = board[i][j] - '1';
if(rows[i][num] || cols[j][num] || blocks[i - i%3 + j/3][num])
return false;
rows[i][num] = cols[j][num] = blocks[i - i%3 + j/3][num] = true;
}
return true;
}
};
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