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64. Minimum Path Sum

9月前 作者：ujn20161222 分类：Toy博客 阅读(30) 违法举报

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class Solution:
    def minPathSum(self, grid: List[List[int]]) -> int:
        # grid=[[0 for i in range(len(grid[0]))]]+grid
        # print(grid)
        # return 21
        n=len(grid[0])
        for i in range(len(grid)):
            if i==0:
                for j in range(1,n):
                    grid[i][j]+=grid[i][j-1]
            else:
                for j in range(n):
                    if j==0:
                        grid[i][j]+=grid[i-1][j]
                    else:
                        grid[i][j]+=min(grid[i-1][j],grid[i][j-1])
        return grid[len(grid)-1][n-1]

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