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42 lines
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42 lines
2.8 KiB
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<p>You are given a string <code>s</code> and an integer <code>repeatLimit</code>. Construct a new string <code>repeatLimitedString</code> using the characters of <code>s</code> such that no letter appears <strong>more than</strong> <code>repeatLimit</code> times <strong>in a row</strong>. You do <strong>not</strong> have to use all characters from <code>s</code>.</p>
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<p>Return <em>the <strong>lexicographically largest</strong> </em><code>repeatLimitedString</code> <em>possible</em>.</p>
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<p>A string <code>a</code> is <strong>lexicographically larger</strong> than a string <code>b</code> if in the first position where <code>a</code> and <code>b</code> differ, string <code>a</code> has a letter that appears later in the alphabet than the corresponding letter in <code>b</code>. If the first <code>min(a.length, b.length)</code> characters do not differ, then the longer string is the lexicographically larger one.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> s = "cczazcc", repeatLimit = 3
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<strong>Output:</strong> "zzcccac"
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<strong>Explanation:</strong> We use all of the characters from s to construct the repeatLimitedString "zzcccac".
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The letter 'a' appears at most 1 time in a row.
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The letter 'c' appears at most 3 times in a row.
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The letter 'z' appears at most 2 times in a row.
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Hence, no letter appears more than repeatLimit times in a row and the string is a valid repeatLimitedString.
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The string is the lexicographically largest repeatLimitedString possible so we return "zzcccac".
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Note that the string "zzcccca" is lexicographically larger but the letter 'c' appears more than 3 times in a row, so it is not a valid repeatLimitedString.
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</pre>
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<p><strong class="example">Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> s = "aababab", repeatLimit = 2
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<strong>Output:</strong> "bbabaa"
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<strong>Explanation:</strong> We use only some of the characters from s to construct the repeatLimitedString "bbabaa".
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The letter 'a' appears at most 2 times in a row.
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The letter 'b' appears at most 2 times in a row.
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Hence, no letter appears more than repeatLimit times in a row and the string is a valid repeatLimitedString.
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The string is the lexicographically largest repeatLimitedString possible so we return "bbabaa".
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Note that the string "bbabaaa" is lexicographically larger but the letter 'a' appears more than 2 times in a row, so it is not a valid repeatLimitedString.
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>1 <= repeatLimit <= s.length <= 10<sup>5</sup></code></li>
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<li><code>s</code> consists of lowercase English letters.</li>
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</ul>
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