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https://gitee.com/coder-xiaomo/leetcode-problemset
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@@ -11,8 +11,8 @@
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"difficulty": "Medium",
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"similarQuestions": "[{\"title\": \"Ugly Number\", \"titleSlug\": \"ugly-number\", \"difficulty\": \"Easy\", \"translatedTitle\": null}, {\"title\": \"Ugly Number II\", \"titleSlug\": \"ugly-number-ii\", \"difficulty\": \"Medium\", \"translatedTitle\": null}, {\"title\": \"Perfect Squares\", \"titleSlug\": \"perfect-squares\", \"difficulty\": \"Medium\", \"translatedTitle\": null}]",
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"exampleTestcases": "10\n0\n1",
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@@ -155,7 +155,7 @@
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"__typename": "CodeSnippetNode"
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}
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],
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"hints": [
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"<p>Let's start with a <i>isPrime</i> function. To determine if a number is prime, we need to check if it is not divisible by any number less than <i>n</i>. The runtime complexity of <i>isPrime</i> function would be O(<i>n</i>) and hence counting the total prime numbers up to <i>n</i> would be O(<i>n</i><sup>2</sup>). Could we do better?</p>",
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"<p>As we know the number must not be divisible by any number > <i>n</i> / 2, we can immediately cut the total iterations half by dividing only up to <i>n</i> / 2. Could we still do better?</p>",
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