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46 lines
2.1 KiB
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<p>Given the array <code>queries</code> of positive integers between <code>1</code> and <code>m</code>, you have to process all <code>queries[i]</code> (from <code>i=0</code> to <code>i=queries.length-1</code>) according to the following rules:</p>
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<ul>
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<li>In the beginning, you have the permutation <code>P=[1,2,3,...,m]</code>.</li>
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<li>For the current <code>i</code>, find the position of <code>queries[i]</code> in the permutation <code>P</code> (<strong>indexing from 0</strong>) and then move this at the beginning of the permutation <code>P</code>. Notice that the position of <code>queries[i]</code> in <code>P</code> is the result for <code>queries[i]</code>.</li>
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</ul>
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<p>Return an array containing the result for the given <code>queries</code>.</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> queries = [3,1,2,1], m = 5
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<strong>Output:</strong> [2,1,2,1]
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<strong>Explanation:</strong> The queries are processed as follow:
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For i=0: queries[i]=3, P=[1,2,3,4,5], position of 3 in P is <strong>2</strong>, then we move 3 to the beginning of P resulting in P=[3,1,2,4,5].
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For i=1: queries[i]=1, P=[3,1,2,4,5], position of 1 in P is <strong>1</strong>, then we move 1 to the beginning of P resulting in P=[1,3,2,4,5].
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For i=2: queries[i]=2, P=[1,3,2,4,5], position of 2 in P is <strong>2</strong>, then we move 2 to the beginning of P resulting in P=[2,1,3,4,5].
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For i=3: queries[i]=1, P=[2,1,3,4,5], position of 1 in P is <strong>1</strong>, then we move 1 to the beginning of P resulting in P=[1,2,3,4,5].
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Therefore, the array containing the result is [2,1,2,1].
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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> queries = [4,1,2,2], m = 4
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<strong>Output:</strong> [3,1,2,0]
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</pre>
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<p><strong class="example">Example 3:</strong></p>
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<pre>
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<strong>Input:</strong> queries = [7,5,5,8,3], m = 8
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<strong>Output:</strong> [6,5,0,7,5]
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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 <= m <= 10^3</code></li>
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<li><code>1 <= queries.length <= m</code></li>
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<li><code>1 <= queries[i] <= m</code></li>
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</ul>
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