【LeetCode】 064. Minimum Path Sum

Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along its path.

Note: You can only move either down or right at any point in time.

public class Solution {
public int minPathSum(int[][] grid) {
for (int i = 0; i < grid.length; i++) {
for (int j = 0; j < grid[0].length; j++) {
if (i != 0 && j != 0) {
grid[i][j] += Math.min(grid[i - 1][j], grid[i][j - 1]);
} else if (i == 0 && j != 0) {
grid[i][j] += grid[i][j - 1];
} else if (i != 0 && j == 0) {
grid[i][j] += grid[i - 1][j];
}
}
}
return grid[grid.length - 1][grid[0].length - 1];
}
}