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44 lines
2.5 KiB
HTML
<p>You are given the logs for users' actions on LeetCode, and an integer <code>k</code>. The logs are represented by a 2D integer array <code>logs</code> where each <code>logs[i] = [ID<sub>i</sub>, time<sub>i</sub>]</code> indicates that the user with <code>ID<sub>i</sub></code> performed an action at the minute <code>time<sub>i</sub></code>.</p>
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<p><strong>Multiple users</strong> can perform actions simultaneously, and a single user can perform <strong>multiple actions</strong> in the same minute.</p>
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<p>The <strong>user active minutes (UAM)</strong> for a given user is defined as the <strong>number of unique minutes</strong> in which the user performed an action on LeetCode. A minute can only be counted once, even if multiple actions occur during it.</p>
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<p>You are to calculate a <strong>1-indexed</strong> array <code>answer</code> of size <code>k</code> such that, for each <code>j</code> (<code>1 <= j <= k</code>), <code>answer[j]</code> is the <strong>number of users</strong> whose <strong>UAM</strong> equals <code>j</code>.</p>
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<p>Return <i>the array </i><code>answer</code><i> as described above</i>.</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> logs = [[0,5],[1,2],[0,2],[0,5],[1,3]], k = 5
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<strong>Output:</strong> [0,2,0,0,0]
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<strong>Explanation:</strong>
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The user with ID=0 performed actions at minutes 5, 2, and 5 again. Hence, they have a UAM of 2 (minute 5 is only counted once).
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The user with ID=1 performed actions at minutes 2 and 3. Hence, they have a UAM of 2.
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Since both users have a UAM of 2, answer[2] is 2, and the remaining answer[j] values are 0.
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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> logs = [[1,1],[2,2],[2,3]], k = 4
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<strong>Output:</strong> [1,1,0,0]
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<strong>Explanation:</strong>
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The user with ID=1 performed a single action at minute 1. Hence, they have a UAM of 1.
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The user with ID=2 performed actions at minutes 2 and 3. Hence, they have a UAM of 2.
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There is one user with a UAM of 1 and one with a UAM of 2.
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Hence, answer[1] = 1, answer[2] = 1, and the remaining values are 0.
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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 <= logs.length <= 10<sup>4</sup></code></li>
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<li><code>0 <= ID<sub>i</sub> <= 10<sup>9</sup></code></li>
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<li><code>1 <= time<sub>i</sub> <= 10<sup>5</sup></code></li>
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<li><code>k</code> is in the range <code>[The maximum <strong>UAM</strong> for a user, 10<sup>5</sup>]</code>.</li>
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</ul>
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