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## 3. [0064. 最小路径和](https://leetcode.cn/problems/minimum-path-sum/)
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### 3.1 题目大意
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### 3.1 题目大意
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**描述**:给定一个包含非负整数的 $m \times n$ 大小的网格 `grid`
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**要求**:找出一条从左上角到右下角的路径,使得路径上的数字总和为最小。
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**说明**
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- 每次只能向下或者向右移动一步。
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- $m == grid.length$。
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- $n == grid[i].length$。
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- $1 \le m, n \le 200$。
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- $0 \le grid[i][j] \le 100$。
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**示例**
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- 示例 1:
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![](../../images/20201024006401.jpg)
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```python
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输入:grid = [[1,3,1],[1,5,1],[4,2,1]]
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输出:7
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解释:因为路径 13111 的总和最小。
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```
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- 示例 2:
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```python
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输入:grid = [[1,2,3],[4,5,6]]
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输出:12
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```

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