solutions/python3/705.py

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<title>leetcode.com | 502: Bad gateway</title>
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              <span class="cf-error-type">Error</span>
              <span class="cf-error-code">502</span>
              <small class="heading-ray-id">Ray ID: 52beb9bebad1d8bd &bull; 2019-10-26 19:09:36 UTC</small>
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            <h2 class="cf-subheadline">Bad gateway</h2>
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                    <h2>What happened?</h2>
                    <p>The web server reported a bad gateway error.</p>
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                    <h2>What can I do?</h2>
                    <p>Please try again in a few minutes.</p>
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    <span class="cf-footer-item">Cloudflare Ray ID: <strong>52beb9bebad1d8bd</strong></span>
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