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Solution.cs
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33 lines (32 loc) · 744 Bytes
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public class Solution
{
public int NumSpecial(int[][] mat)
{
int m = mat.Length, n = mat[0].Length;
int[] cols = new int[n];
int[] rows = new int[m];
for (int i = 0; i < m; i++)
{
for (int j = 0; j < n; j++)
{
if (mat[i][j] == 1)
{
rows[i]++;
cols[j]++;
}
}
}
int ans = 0;
for (int i = 0; i < m; i++)
{
for (int j = 0; j < n; j++)
{
if (mat[i][j] == 1 && rows[i] == 1 && cols[j] == 1)
{
ans++;
}
}
}
return ans;
}
}