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51 lines
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51 lines
2.6 KiB
HTML
<p>You have an initial <strong>power</strong> of <code>power</code>, an initial <strong>score</strong> of <code>0</code>, and a bag of <code>tokens</code> where <code>tokens[i]</code> is the value of the <code>i<sup>th</sup></code> token (0-indexed).</p>
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<p>Your goal is to maximize your total <strong>score</strong> by potentially playing each token in one of two ways:</p>
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<ul>
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<li>If your current <strong>power</strong> is at least <code>tokens[i]</code>, you may play the <code>i<sup>th</sup></code> token face up, losing <code>tokens[i]</code> <strong>power</strong> and gaining <code>1</code> <strong>score</strong>.</li>
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<li>If your current <strong>score</strong> is at least <code>1</code>, you may play the <code>i<sup>th</sup></code> token face down, gaining <code>tokens[i]</code> <strong>power</strong> and losing <code>1</code> <strong>score</strong>.</li>
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</ul>
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<p>Each token may be played <strong>at most</strong> once and <strong>in any order</strong>. You do <strong>not</strong> have to play all the tokens.</p>
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<p>Return <em>the largest possible <strong>score</strong> you can achieve after playing any number of tokens</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> tokens = [100], power = 50
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<strong>Output:</strong> 0
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<strong>Explanation</strong><strong>:</strong> Playing the only token in the bag is impossible because you either have too little power or too little score.
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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> tokens = [100,200], power = 150
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<strong>Output:</strong> 1
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<strong>Explanation:</strong> Play the 0<sup>th</sup> token (100) face up, your power becomes 50 and score becomes 1.
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There is no need to play the 1<sup>st</sup> token since you cannot play it face up to add to your score.
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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> tokens = [100,200,300,400], power = 200
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<strong>Output:</strong> 2
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<strong>Explanation:</strong> Play the tokens in this order to get a score of 2:
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1. Play the 0<sup>th</sup> token (100) face up, your power becomes 100 and score becomes 1.
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2. Play the 3<sup>rd</sup> token (400) face down, your power becomes 500 and score becomes 0.
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3. Play the 1<sup>st</sup> token (200) face up, your power becomes 300 and score becomes 1.
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4. Play the 2<sup>nd </sup>token (300) face up, your power becomes 0 and score becomes 2.
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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>0 <= tokens.length <= 1000</code></li>
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<li><code>0 <= tokens[i], power < 10<sup>4</sup></code></li>
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</ul>
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