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35 lines
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35 lines
1.0 KiB
HTML
<p>You have <code>n</code> <code>tiles</code>, where each tile has one letter <code>tiles[i]</code> printed on it.</p>
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<p>Return <em>the number of possible non-empty sequences of letters</em> you can make using the letters printed on those <code>tiles</code>.</p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> tiles = "AAB"
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<strong>Output:</strong> 8
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<strong>Explanation: </strong>The possible sequences are "A", "B", "AA", "AB", "BA", "AAB", "ABA", "BAA".
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</pre>
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<p><strong>Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> tiles = "AAABBC"
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<strong>Output:</strong> 188
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</pre>
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<p><strong>Example 3:</strong></p>
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<pre>
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<strong>Input:</strong> tiles = "V"
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<strong>Output:</strong> 1
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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 <= tiles.length <= 7</code></li>
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<li><code>tiles</code> consists of uppercase English letters.</li>
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</ul>
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