leetcode-problemset/leetcode-cn/originData/delete-columns-to-make-sorted-ii.json

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            "title": "Delete Columns to Make Sorted II",
            "titleSlug": "delete-columns-to-make-sorted-ii",
            "content": "<p>You are given an array of <code>n</code> strings <code>strs</code>, all of the same length.</p>\n\n<p>We may choose any deletion indices, and we delete all the characters in those indices for each string.</p>\n\n<p>For example, if we have <code>strs = [&quot;abcdef&quot;,&quot;uvwxyz&quot;]</code> and deletion indices <code>{0, 2, 3}</code>, then the final array after deletions is <code>[&quot;bef&quot;, &quot;vyz&quot;]</code>.</p>\n\n<p>Suppose we chose a set of deletion indices <code>answer</code> such that after deletions, the final array has its elements in <strong>lexicographic</strong> order (i.e., <code>strs[0] &lt;= strs[1] &lt;= strs[2] &lt;= ... &lt;= strs[n - 1]</code>). Return <em>the minimum possible value of</em> <code>answer.length</code>.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> strs = [&quot;ca&quot;,&quot;bb&quot;,&quot;ac&quot;]\n<strong>Output:</strong> 1\n<strong>Explanation:</strong> \nAfter deleting the first column, strs = [&quot;a&quot;, &quot;b&quot;, &quot;c&quot;].\nNow strs is in lexicographic order (ie. strs[0] &lt;= strs[1] &lt;= strs[2]).\nWe require at least 1 deletion since initially strs was not in lexicographic order, so the answer is 1.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> strs = [&quot;xc&quot;,&quot;yb&quot;,&quot;za&quot;]\n<strong>Output:</strong> 0\n<strong>Explanation:</strong> \nstrs is already in lexicographic order, so we do not need to delete anything.\nNote that the rows of strs are not necessarily in lexicographic order:\ni.e., it is NOT necessarily true that (strs[0][0] &lt;= strs[0][1] &lt;= ...)\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> strs = [&quot;zyx&quot;,&quot;wvu&quot;,&quot;tsr&quot;]\n<strong>Output:</strong> 3\n<strong>Explanation:</strong> We have to delete every column.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>n == strs.length</code></li>\n\t<li><code>1 &lt;= n &lt;= 100</code></li>\n\t<li><code>1 &lt;= strs[i].length &lt;= 100</code></li>\n\t<li><code>strs[i]</code> consists of lowercase English letters.</li>\n</ul>\n",
            "translatedTitle": "删列造序 II",
            "translatedContent": "<p>给定由 <code>n</code> 个字符串组成的数组 <code>strs</code>，其中每个字符串长度相等。</p>\n\n<p>选取一个删除索引序列，对于 <code>strs</code> 中的每个字符串，删除对应每个索引处的字符。</p>\n\n<p>比如，有 <code>strs = [\"abcdef\", \"uvwxyz\"]</code>，删除索引序列 <code>{0, 2, 3}</code>，删除后 <code>strs</code> 为<code>[\"bef\", \"vyz\"]</code>。</p>\n\n<p>假设，我们选择了一组删除索引 <code>answer</code>，那么在执行删除操作之后，最终得到的数组的元素是按 <strong>字典序</strong>（<code>strs[0] <= strs[1] <= strs[2] ... <= strs[n - 1]</code>）排列的，然后请你返回 <code>answer.length</code> 的最小可能值。</p>\n\n<p> </p>\n\n<ol>\n</ol>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>strs = [\"ca\",\"bb\",\"ac\"]\n<strong>输出：</strong>1\n<strong>解释： </strong>\n删除第一列后，strs = [\"a\", \"b\", \"c\"]。\n现在 strs 中元素是按字典排列的 (即，strs[0] <= strs[1] <= strs[2])。\n我们至少需要进行 1 次删除，因为最初 strs 不是按字典序排列的，所以答案是 1。\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>strs = [\"xc\",\"yb\",\"za\"]\n<strong>输出：</strong>0\n<strong>解释：</strong>\nstrs 的列已经是按字典序排列了，所以我们不需要删除任何东西。\n注意 strs 的行不需要按字典序排列。\n也就是说，strs[0][0] <= strs[0][1] <= ... 不一定成立。\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre>\n<strong>输入：</strong>strs = [\"zyx\",\"wvu\",\"tsr\"]\n<strong>输出：</strong>3\n<strong>解释：</strong>\n我们必须删掉每一列。\n</pre>\n\n<p> </p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>n == strs.length</code></li>\n\t<li><code>1 <= n <= 100</code></li>\n\t<li><code>1 <= strs[i].length <= 100</code></li>\n\t<li><code>strs[i]</code> 由小写英文字母组成</li>\n</ul>\n",
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