Leetcode 64 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.

和62，63如出一辙的套路，没什么含量

代码语言：javascript复制

class Solution {
public:
    int minPathSum(vector<vector<int>>& grid) {
        if(grid.size()==0) return 0;
        for(int i=1;i<grid.size();i  )
            grid[i][0] =grid[i-1][0];
        for(int i=1;i<grid[0].size();i  )
            grid[0][i] =grid[0][i-1];
        for(int i=1;i<grid.size();i  )
            for(int j=1;j<grid[0].size();j  )
                grid[i][j] =min(grid[i-1][j],grid[i][j-1]);
        return grid[grid.size()-1][grid[0].size()-1];
    }
};

grid numbers path sum time

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