mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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173 lines
29 KiB
JSON
173 lines
29 KiB
JSON
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"title": "Majority Frequency Characters",
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"content": "<p>You are given a string <code>s</code> consisting of lowercase English letters.</p>\n\n<p>The <strong>frequency group</strong> for a value <code>k</code> is the set of characters that appear exactly <code>k</code> times in s.</p>\n\n<p>The <strong>majority frequency group</strong> is the frequency group that contains the largest number of <strong>distinct</strong> characters.</p>\n\n<p>Return a string containing all characters in the majority frequency group, in <strong>any</strong> order. If two or more frequency groups tie for that largest size, pick the group whose frequency <code>k</code> is <strong>larger</strong>.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">s = "aaabbbccdddde"</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">"ab"</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<table style=\"border: 1px solid black;\">\n\t<thead>\n\t\t<tr>\n\t\t\t<th style=\"border: 1px solid black;\">Frequency (k)</th>\n\t\t\t<th style=\"border: 1px solid black;\">Distinct characters in group</th>\n\t\t\t<th style=\"border: 1px solid black;\">Group size</th>\n\t\t\t<th style=\"border: 1px solid black;\">Majority?</th>\n\t\t</tr>\n\t</thead>\n\t<tbody>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">4</td>\n\t\t\t<td style=\"border: 1px solid black;\">{d}</td>\n\t\t\t<td style=\"border: 1px solid black;\">1</td>\n\t\t\t<td style=\"border: 1px solid black;\">No</td>\n\t\t</tr>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">3</td>\n\t\t\t<td style=\"border: 1px solid black;\">{a, b}</td>\n\t\t\t<td style=\"border: 1px solid black;\">2</td>\n\t\t\t<td style=\"border: 1px solid black;\"><strong>Yes</strong></td>\n\t\t</tr>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">2</td>\n\t\t\t<td style=\"border: 1px solid black;\">{c}</td>\n\t\t\t<td style=\"border: 1px solid black;\">1</td>\n\t\t\t<td style=\"border: 1px solid black;\">No</td>\n\t\t</tr>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">1</td>\n\t\t\t<td style=\"border: 1px solid black;\">{e}</td>\n\t\t\t<td style=\"border: 1px solid black;\">1</td>\n\t\t\t<td style=\"border: 1px solid black;\">No</td>\n\t\t</tr>\n\t</tbody>\n</table>\n\n<p>Both characters <code>'a'</code> and <code>'b'</code> share the same frequency 3, they are in the majority frequency group. <code>"ba"</code> is also a valid answer.</p>\n</div>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">s = "abcd"</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">"abcd"</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<table style=\"border: 1px solid black;\">\n\t<thead>\n\t\t<tr>\n\t\t\t<th style=\"border: 1px solid black;\">Frequency (k)</th>\n\t\t\t<th style=\"border: 1px solid black;\">Distinct characters in group</th>\n\t\t\t<th style=\"border: 1px solid black;\">Group size</th>\n\t\t\t<th style=\"border: 1px solid black;\">Majority?</th>\n\t\t</tr>\n\t</thead>\n\t<tbody>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">1</td>\n\t\t\t<td style=\"border: 1px solid black;\">{a, b, c, d}</td>\n\t\t\t<td style=\"border: 1px solid black;\">4</td>\n\t\t\t<td style=\"border: 1px solid black;\"><strong>Yes</strong></td>\n\t\t</tr>\n\t</tbody>\n</table>\n\n<p>All characters share the same frequency 1, they are all in the majority frequency group.</p>\n</div>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">s = "pfpfgi"</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">"fp"</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<table style=\"border: 1px solid black;\">\n\t<thead>\n\t\t<tr>\n\t\t\t<th style=\"border: 1px solid black;\">Frequency (k)</th>\n\t\t\t<th style=\"border: 1px solid black;\">Distinct characters in group</th>\n\t\t\t<th style=\"border: 1px solid black;\">Group size</th>\n\t\t\t<th style=\"border: 1px solid black;\">Majority?</th>\n\t\t</tr>\n\t</thead>\n\t<tbody>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">2</td>\n\t\t\t<td style=\"border: 1px solid black;\">{p, f}</td>\n\t\t\t<td style=\"border: 1px solid black;\">2</td>\n\t\t\t<td style=\"border: 1px solid black;\"><strong>Yes</strong></td>\n\t\t</tr>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">1</td>\n\t\t\t<td style=\"border: 1px solid black;\">{g, i}</td>\n\t\t\t<td style=\"border: 1px solid black;\">2</td>\n\t\t\t<td style=\"border: 1px solid black;\">No (tied size, lower frequency)</td>\n\t\t</tr>\n\t</tbody>\n</table>\n\n<p>Both characters <code>'p'</code> and <code>'f'</code> share the same frequency 2, they are in the majority frequency group. There is a tie in group size with frequency 1, but we pick the higher frequency: 2.</p>\n</div>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= s.length <= 100</code></li>\n\t<li><code>s</code> consists only of lowercase English letters.</li>\n</ul>\n",
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"translatedTitle": "众数频率字符",
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"translatedContent": "<p>给你一个由小写英文字母组成的字符串 <code>s</code>。</p>\n\n<p>对于一个值 <code>k</code>，<strong>频率组</strong> 是在 <code>s</code> 中恰好出现 <code>k</code> 次的字符集合。</p>\n\n<p><strong>众数频率组</strong> 是包含 <strong>不同 </strong>字符数量最多的频率组。</p>\n\n<p>返回一个字符串，包含众数频率组中的所有字符，字符的顺序 <strong>不限 </strong>。如果两个或多个频率组的大小并列最大，则选择其频率 <code>k</code> <strong>较大 </strong>的那个组。</p>\n\n<p> </p>\n\n<p><strong class=\"example\">示例 1:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>输入:</strong> <span class=\"example-io\">s = \"aaabbbccdddde\"</span></p>\n\n<p><strong>输出:</strong> <span class=\"example-io\">\"ab\"</span></p>\n\n<p><strong>解释:</strong></p>\n\n<table style=\"border: 1px solid black;\">\n\t<thead>\n\t\t<tr>\n\t\t\t<th style=\"border: 1px solid black;\">频率 (k)</th>\n\t\t\t<th style=\"border: 1px solid black;\">组中不同字符</th>\n\t\t\t<th style=\"border: 1px solid black;\">组大小</th>\n\t\t\t<th style=\"border: 1px solid black;\">是否众数?</th>\n\t\t</tr>\n\t</thead>\n\t<tbody>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">4</td>\n\t\t\t<td style=\"border: 1px solid black;\">{d}</td>\n\t\t\t<td style=\"border: 1px solid black;\">1</td>\n\t\t\t<td style=\"border: 1px solid black;\">否</td>\n\t\t</tr>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">3</td>\n\t\t\t<td style=\"border: 1px solid black;\">{a, b}</td>\n\t\t\t<td style=\"border: 1px solid black;\">2</td>\n\t\t\t<td style=\"border: 1px solid black;\"><strong>是</strong></td>\n\t\t</tr>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">2</td>\n\t\t\t<td style=\"border: 1px solid black;\">{c}</td>\n\t\t\t<td style=\"border: 1px solid black;\">1</td>\n\t\t\t<td style=\"border: 1px solid black;\">否</td>\n\t\t</tr>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">1</td>\n\t\t\t<td style=\"border: 1px solid black;\">{e}</td>\n\t\t\t<td style=\"border: 1px solid black;\">1</td>\n\t\t\t<td style=\"border: 1px solid black;\">否</td>\n\t\t</tr>\n\t</tbody>\n</table>\n\n<p>字符 <code>'a'</code> 和 <code>'b'</code> 的频率相同，都为 3，它们在众数频率组中。</p>\n</div>\n\n<p><strong class=\"example\">示例 2:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>输入:</strong> <span class=\"example-io\">s = \"abcd\"</span></p>\n\n<p><strong>输出:</strong> <span class=\"example-io\">\"abcd\"</span></p>\n\n<p><strong>解释:</strong></p>\n\n<table style=\"border: 1px solid black;\">\n\t<thead>\n\t\t<tr>\n\t\t\t<th style=\"border: 1px solid black;\">频率 (k)</th>\n\t\t\t<th style=\"border: 1px solid black;\">组中不同字符</th>\n\t\t\t<th style=\"border: 1px solid black;\">组大小</th>\n\t\t\t<th style=\"border: 1px solid black;\">是否众数?</th>\n\t\t</tr>\n\t</thead>\n\t<tbody>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">1</td>\n\t\t\t<td style=\"border: 1px solid black;\">{a, b, c, d}</td>\n\t\t\t<td style=\"border: 1px solid black;\">4</td>\n\t\t\t<td style=\"border: 1px solid black;\"><strong>是</strong></td>\n\t\t</tr>\n\t</tbody>\n</table>\n\n<p>所有字符的频率都相同，都为 1，它们都在众数频率组中。</p>\n</div>\n\n<p><strong class=\"example\">示例 3:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>输入:</strong> <span class=\"example-io\">s = \"pfpfgi\"</span></p>\n\n<p><strong>输出:</strong> <span class=\"example-io\">\"fp\"</span></p>\n\n<p><strong>解释:</strong></p>\n\n<table style=\"border: 1px solid black;\">\n\t<thead>\n\t\t<tr>\n\t\t\t<th style=\"border: 1px solid black;\">频率 (k)</th>\n\t\t\t<th style=\"border: 1px solid black;\">组中不同字符</th>\n\t\t\t<th style=\"border: 1px solid black;\">组大小</th>\n\t\t\t<th style=\"border: 1px solid black;\">是否众数?</th>\n\t\t</tr>\n\t</thead>\n\t<tbody>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">2</td>\n\t\t\t<td style=\"border: 1px solid black;\">{p, f}</td>\n\t\t\t<td style=\"border: 1px solid black;\">2</td>\n\t\t\t<td style=\"border: 1px solid black;\"><strong>是</strong></td>\n\t\t</tr>\n\t\t<tr>\n\t\t\t<td style=\"border: 1px solid black;\">1</td>\n\t\t\t<td style=\"border: 1px solid black;\">{g, i}</td>\n\t\t\t<td style=\"border: 1px solid black;\">2</td>\n\t\t\t<td style=\"border: 1px solid black;\">否 (组大小并列，选择频率更大的 k = 2)</td>\n\t\t</tr>\n\t</tbody>\n</table>\n\n<p>字符 <code>'p'</code> 和 <code>'f'</code> 的频率相同，都为 2，它们在众数频率组中。频率为 1 的组大小并列，但我们选择频率更高的组 2。</p>\n</div>\n\n<p> </p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>1 <= s.length <= 100</code></li>\n\t<li><code>s</code> 只包含小写英文字母。</li>\n</ul>\n",
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