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Solution.cs
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31 lines (30 loc) · 793 Bytes
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public class Solution
{
public int UniquePathsWithObstacles(int[][] obstacleGrid)
{
int n = obstacleGrid.Length, m = obstacleGrid[0].Length;
int[,] dp = new int[n, m];
for (int i = 0; i < n; i++)
{
if (obstacleGrid[i][0] == 1) break;
dp[i, 0] = 1;
}
for (int j = 0; j < m; j++)
{
if (obstacleGrid[0][j] == 1) break;
dp[0, j] = 1;
}
for (int i = 1; i < n; i++)
{
for (int j = 1; j < m; j++)
{
if (obstacleGrid[i][j] == 1) dp[i, j] = 0;
else
{
dp[i, j] = dp[i - 1, j] + dp[i, j - 1];
}
}
}
return dp[n - 1, m - 1];
}
}