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56 lines
2.4 KiB
HTML
56 lines
2.4 KiB
HTML
<p>You are given three <strong>positive</strong> integers <code>num1</code>, <code>num2</code>, and <code>num3</code>.</p>
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<p>The <code>key</code> of <code>num1</code>, <code>num2</code>, and <code>num3</code> is defined as a four-digit number such that:</p>
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<ul>
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<li>Initially, if any number has <strong>less than</strong> four digits, it is padded with <strong>leading zeros</strong>.</li>
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<li>The <code>i<sup>th</sup></code> digit (<code>1 <= i <= 4</code>) of the <code>key</code> is generated by taking the <strong>smallest</strong> digit among the <code>i<sup>th</sup></code> digits of <code>num1</code>, <code>num2</code>, and <code>num3</code>.</li>
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</ul>
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<p>Return the <code>key</code> of the three numbers <strong>without</strong> leading zeros (<em>if any</em>).</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">num1 = 1, num2 = 10, num3 = 1000</span></p>
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<p><strong>Output:</strong> <span class="example-io">0</span></p>
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<p><strong>Explanation:</strong></p>
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<p>On padding, <code>num1</code> becomes <code>"0001"</code>, <code>num2</code> becomes <code>"0010"</code>, and <code>num3</code> remains <code>"1000"</code>.</p>
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<ul>
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<li>The <code>1<sup>st</sup></code> digit of the <code>key</code> is <code>min(0, 0, 1)</code>.</li>
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<li>The <code>2<sup>nd</sup></code> digit of the <code>key</code> is <code>min(0, 0, 0)</code>.</li>
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<li>The <code>3<sup>rd</sup></code> digit of the <code>key</code> is <code>min(0, 1, 0)</code>.</li>
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<li>The <code>4<sup>th</sup></code> digit of the <code>key</code> is <code>min(1, 0, 0)</code>.</li>
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</ul>
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<p>Hence, the <code>key</code> is <code>"0000"</code>, i.e. 0.</p>
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</div>
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<p><strong class="example">Example 2:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">num1 = 987, num2 = 879, num3 = 798</span></p>
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<p><strong>Output:</strong> <span class="example-io">777</span></p>
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</div>
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<p><strong class="example">Example 3:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">num1 = 1, num2 = 2, num3 = 3</span></p>
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<p><strong>Output:</strong> <span class="example-io">1</span></p>
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</div>
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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 <= num1, num2, num3 <= 9999</code></li>
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</ul>
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