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40 lines
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40 lines
2.0 KiB
HTML
<p>You are playing a game that contains multiple characters, and each of the characters has <strong>two</strong> main properties: <strong>attack</strong> and <strong>defense</strong>. You are given a 2D integer array <code>properties</code> where <code>properties[i] = [attack<sub>i</sub>, defense<sub>i</sub>]</code> represents the properties of the <code>i<sup>th</sup></code> character in the game.</p>
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<p>A character is said to be <strong>weak</strong> if any other character has <strong>both</strong> attack and defense levels <strong>strictly greater</strong> than this character's attack and defense levels. More formally, a character <code>i</code> is said to be <strong>weak</strong> if there exists another character <code>j</code> where <code>attack<sub>j</sub> > attack<sub>i</sub></code> and <code>defense<sub>j</sub> > defense<sub>i</sub></code>.</p>
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<p>Return <em>the number of <strong>weak</strong> characters</em>.</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> properties = [[5,5],[6,3],[3,6]]
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<strong>Output:</strong> 0
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<strong>Explanation:</strong> No character has strictly greater attack and defense than the other.
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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> properties = [[2,2],[3,3]]
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<strong>Output:</strong> 1
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<strong>Explanation:</strong> The first character is weak because the second character has a strictly greater attack and defense.
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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> properties = [[1,5],[10,4],[4,3]]
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<strong>Output:</strong> 1
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<strong>Explanation:</strong> The third character is weak because the second character has a strictly greater attack and defense.
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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>2 <= properties.length <= 10<sup>5</sup></code></li>
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<li><code>properties[i].length == 2</code></li>
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<li><code>1 <= attack<sub>i</sub>, defense<sub>i</sub> <= 10<sup>5</sup></code></li>
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</ul>
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