![\"\"](\"https://assets.leetcode.com/uploads/2022/05/10/griddrawio-4.png\")
You are given an m x n integer matrix grid, where you can move from a cell to any adjacent cell in all 4 directions.
Return the number of strictly increasing paths in the grid such that you can start from any cell and end at any cell. Since the answer may be very large, return it modulo 109 + 7.
Two paths are considered different if they do not have exactly the same sequence of visited cells.
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Example 1:
\n\n\nInput: grid = [[1,1],[3,4]]\nOutput: 8\nExplanation: The strictly increasing paths are:\n- Paths with length 1: [1], [1], [3], [4].\n- Paths with length 2: [1 -> 3], [1 -> 4], [3 -> 4].\n- Paths with length 3: [1 -> 3 -> 4].\nThe total number of paths is 4 + 3 + 1 = 8.\n\n\n
Example 2:
\n\n\nInput: grid = [[1],[2]]\nOutput: 3\nExplanation: The strictly increasing paths are:\n- Paths with length 1: [1], [2].\n- Paths with length 2: [1 -> 2].\nThe total number of paths is 2 + 1 = 3.\n\n\n
\n
Constraints:
\n\nm == grid.lengthn == grid[i].length1 <= m, n <= 10001 <= m * n <= 1051 <= grid[i][j] <= 105给你一个 m x n 的整数网格图 grid ，你可以从一个格子移动到 4 个方向相邻的任意一个格子。
请你返回在网格图中从 任意 格子出发，达到 任意 格子，且路径中的数字是 严格递增 的路径数目。由于答案可能会很大，请将结果对 109 + 7 取余 后返回。
如果两条路径中访问过的格子不是完全相同的，那么它们视为两条不同的路径。
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示例 1：
\n\n
输入：grid = [[1,1],[3,4]]\n输出：8\n解释：严格递增路径包括：\n- 长度为 1 的路径：[1]，[1]，[3]，[4] 。\n- 长度为 2 的路径：[1 -> 3]，[1 -> 4]，[3 -> 4] 。\n- 长度为 3 的路径：[1 -> 3 -> 4] 。\n路径数目为 4 + 3 + 1 = 8 。\n\n\n
示例 2：
\n\n输入：grid = [[1],[2]]\n输出：3\n解释：严格递增路径包括：\n- 长度为 1 的路径：[1]，[2] 。\n- 长度为 2 的路径：[1 -> 2] 。\n路径数目为 2 + 1 = 3 。\n\n\n
\n\n
提示：
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