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34 lines
1.5 KiB
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34 lines
1.5 KiB
HTML
<p>You are given an array <code>arr</code> which consists of only zeros and ones, divide the array into <strong>three non-empty parts</strong> such that all of these parts represent the same binary value.</p>
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<p>If it is possible, return any <code>[i, j]</code> with <code>i + 1 < j</code>, such that:</p>
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<ul>
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<li><code>arr[0], arr[1], ..., arr[i]</code> is the first part,</li>
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<li><code>arr[i + 1], arr[i + 2], ..., arr[j - 1]</code> is the second part, and</li>
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<li><code>arr[j], arr[j + 1], ..., arr[arr.length - 1]</code> is the third part.</li>
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<li>All three parts have equal binary values.</li>
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</ul>
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<p>If it is not possible, return <code>[-1, -1]</code>.</p>
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<p>Note that the entire part is used when considering what binary value it represents. For example, <code>[1,1,0]</code> represents <code>6</code> in decimal, not <code>3</code>. Also, leading zeros <strong>are allowed</strong>, so <code>[0,1,1]</code> and <code>[1,1]</code> represent the same value.</p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<pre><strong>Input:</strong> arr = [1,0,1,0,1]
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<strong>Output:</strong> [0,3]
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</pre><p><strong>Example 2:</strong></p>
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<pre><strong>Input:</strong> arr = [1,1,0,1,1]
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<strong>Output:</strong> [-1,-1]
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</pre><p><strong>Example 3:</strong></p>
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<pre><strong>Input:</strong> arr = [1,1,0,0,1]
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<strong>Output:</strong> [0,2]
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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>3 <= arr.length <= 3 * 10<sup>4</sup></code></li>
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<li><code>arr[i]</code> is <code>0</code> or <code>1</code></li>
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</ul>
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