LeetCode Minimum Path Sum

链接: https://oj.leetcode.com/problems/minimum-path-sum/
简单的动态规划.

[i][j]表示到达位置(i,j)时的最小sum

public class Solution
{

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

}
}