leetcode-problemset/leetcode/originData/maximum-trailing-zeros-in-a-cornered-path.json

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            "title": "Maximum Trailing Zeros in a Cornered Path",
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            "content": "<p>You are given a 2D integer array <code>grid</code> of size <code>m x n</code>, where each cell contains a positive integer.</p>\n\n<p>A <strong>cornered path</strong> is defined as a set of adjacent cells with <strong>at most</strong> one turn. More specifically, the path should exclusively move either <strong>horizontally</strong> or <strong>vertically</strong> up to the turn (if there is one), without returning to a previously visited cell. After the turn, the path will then move exclusively in the <strong>alternate</strong> direction: move vertically if it moved horizontally, and vice versa, also without returning to a previously visited cell.</p>\n\n<p>The <strong>product</strong> of a path is defined as the product of all the values in the path.</p>\n\n<p>Return <em>the <strong>maximum</strong> number of <strong>trailing zeros</strong> in the product of a cornered path found in </em><code>grid</code>.</p>\n\n<p>Note:</p>\n\n<ul>\n\t<li><strong>Horizontal</strong> movement means moving in either the left or right direction.</li>\n\t<li><strong>Vertical</strong> movement means moving in either the up or down direction.</li>\n</ul>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2022/03/23/ex1new2.jpg\" style=\"width: 577px; height: 190px;\" />\n<pre>\n<strong>Input:</strong> grid = [[23,17,15,3,20],[8,1,20,27,11],[9,4,6,2,21],[40,9,1,10,6],[22,7,4,5,3]]\n<strong>Output:</strong> 3\n<strong>Explanation:</strong> The grid on the left shows a valid cornered path.\nIt has a product of 15 * 20 * 6 * 1 * 10 = 18000 which has 3 trailing zeros.\nIt can be shown that this is the maximum trailing zeros in the product of a cornered path.\n\nThe grid in the middle is not a cornered path as it has more than one turn.\nThe grid on the right is not a cornered path as it requires a return to a previously visited cell.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2022/03/25/ex2.jpg\" style=\"width: 150px; height: 157px;\" />\n<pre>\n<strong>Input:</strong> grid = [[4,3,2],[7,6,1],[8,8,8]]\n<strong>Output:</strong> 0\n<strong>Explanation:</strong> The grid is shown in the figure above.\nThere are no cornered paths in the grid that result in a product with a trailing zero.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>m == grid.length</code></li>\n\t<li><code>n == grid[i].length</code></li>\n\t<li><code>1 &lt;= m, n &lt;= 10<sup>5</sup></code></li>\n\t<li><code>1 &lt;= m * n &lt;= 10<sup>5</sup></code></li>\n\t<li><code>1 &lt;= grid[i][j] &lt;= 1000</code></li>\n</ul>\n",
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            "hints": [
                "What actually tells us the trailing zeros of the product of a path?",
                "It is the sum of the exponents of 2 and sum of the exponents of 5 of the prime factorizations of the numbers on that path. The smaller of the two is the answer for that path.",
                "We can then treat each cell as the elbow point and calculate the largest minimum (sum of 2 exponents, sum of 5 exponents) from the combination of top-left, top-right, bottom-left and bottom-right.",
                "To do this efficiently, we should use the prefix sum technique."
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