public class 最小路径和 {
public int minPathSum(int[][] grid) {
int[] dp = new int[grid[0].length];
dp[0] = grid[0][0];
for (int i = grid.length - 1; i >= 0; i--) {
for (int j = grid[0].length; j >= 0; j--) {
if (i == grid.length - 1 && j != grid[0].length - 1) {
dp[j] = grid[i][j] + dp[j + 1];
} else if (i != grid.length - 1 && j == grid[0].length - 1) {
dp[j] = grid[i][j] + dp[j];
} else if (i != grid.length - 1 && j != grid[0].length - 1) {
dp[j] = grid[i][j] + Math.min(dp[j],dp[j + 1]);
} else {
dp[j] = grid[i][j];
}
}
}
return dp[0];
}
}