for Atom and RSS and KML
It looks like this is a web page, not a feed. I looked for a feed associated with this page, but couldn't find one. Please enter the address of your feed to validate.
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'leetcode.com',cType: 'managed',cRay: '96bb91c22e8d2f1e',cH: 'RDlAbywIp42zBZuLZt.FkC3gh0SbNxd.D64THIhdeUI-1754619991-1.2.1.1-HK86JclRZixVI0sMPuGvqVi4aMnCgXphdJZtC0Wym..q0Nj0FU9ZjRnAyllkqIS.',cUPMDTk:"\/kruqqmmcycao\/?__cf_chl_tk=PCV5TECVqU59CbzqeTGWCzeqbcRKS5ub.hhkz4nPouk-1754619991-1.0.1.1-v_6kNddCYBnxYqXoS2bCaTo6emt8A5c9sWapUfFEyew",cFPWv: 'b',cITimeS: '1754619991',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/kruqqmmcycao\/?__cf_chl_f_tk=PCV5TECVqU59CbzqeTGWCzeqbcRKS5ub.hhkz4nPouk-1754619991-1.0.1.1-v_6kNddCYBnxYqXoS2bCaTo6emt8A5c9sWapUfFEyew",md: 'MTWbff.Y6n7gWbw..KcX693V2mOC6fl1h0ZnGfQKNyI-1754619991-1.2.1.1-Q.aQCOzNrCjVyGfQDNgpslIj9aux8PJf2Ns17GO1wuq9nGZICunhBsLVHv.WtYxR7GnTCXuT08faQUsRU4i9eDUmY4hxUSzgHv3taMqEz.Ig_TB4xyBO62AhFvAvu1xRipRlOYwnf6MgZxxMFfa0qoil12R8o13QENlHSm9.2D95tpHUeXjJDKEjOnqvq9F52d7WNX6lLShFUdlEAf_PT_ib0p2JeUChpoPytktyil.N0hoMRFq329PIVI41nVgRhts_XQ9JxRQL1xbAFPqyRVHwVZONWOJGDeuIIelwka6_pzwovQKC_8M5F.082EfBN1_TPI3Z_pZhWLXC8wPgBwEKNIrbOHnnv5KCAv.EG_NbQsHAIYZX2d.eREXQJStyCEzjqYLIBhTypc1er93etpwVcvLQhfmr0mZoGQSIE4WZLcU6NVt66C_mWK9RE4UOVxRM2.NDzzXABjnJ5CfukzJ115QiUgoKJ5W4CbYLJAWRN4jhuP010uCzDI5EftG25mtFdIVL5STWuEI58QFQtcpvABgLuUkX1HCS9Ig712ZwTYT3ndqaztQb3Bt1vMYAVDmYazsBhqbgjuStqC3SopCZ5O2Lh4boUFY1mFhPFRivL7nQ2YHXhDzCH2Ttte.m8akJnqA9n5C6rYrIsWD09vRV37hShBjAdhZxxN6fRtDNLOf1MGBpJSqITBBL2WGoTqwhn49VLMLfxvZtS7IMOW5.22MOwJtNK9wnMGfEMWYbFEMtqf.3653wVe8b4cMczOlzHv.cghMCR_sT83cCznxMRTt00W559ELwXoRU5PduC7Mi0.c1YED4XdU1NhEdyfHdrImPLM2JJhGk_k2jzV3WnehYZ_AROgDkjLFly5j6Nl5EPiXvZPJ2btimaK1ZkNERvCZnWZHjs7oawIhdaRKmBZ3Nw2i16uQTPnQUoLc',mdrd: 'Bat6asniPKGyQLVJx553QOlmXZripjI2kwhCdJCF6tQ-1754619991-1.2.1.1-UYKjKsuTXo6muiH0T2wAj9tlHg_ph99uB6ND7b0t_m.P8uX5iVNOBwhW2bLi6UcDM27O5t7UEvg9k7fUKlz6MTe8VTEdCQgqo5jirjIf5CQEr0r9Gu9x4uRZvi1Qfk2Oadc12PoVL5.xE7mFYe4pWYD50mZEBuISTIRHGvfXAlcr4bQl2x9ZB19JJglqPkfySrpsTjARf6IvlVHSHVL1BJ7cKE1NVBzUnA8hYquhMxmmjhihgcQ6nNypehCrY1J3SmWSw3Tl1seE9Ts5Whbru8gG5vg.3iyetAZFrL49K1R.66KsiOoEz4TjAkYNPA5CUFH0VfhiWA.SSqKOuJ3LdeXorwfKmiRbZyP8UsxJ12o8nZPoaWdgiZsjIWu5rK21jiqAjq0Aeh0yqhFJwMaLEV13tfVw.QEpGPbu4jfx1SF_sEZu6XWQ9sYnNMW7LGENd7PDMqK8MInaeyU.Bav1HP9_4BW.1djFP.wKrLOLeKK2ta8QJRLqLqpGWhFIdaUzfqZGhx2QJlnLRmhi3PfF0wco2rqHxDC8tF3TYecY.OAgXCk24_iBuzwMM868AdjC9Sp_eMfXX1YUIz.m0e1.Ri323BmT7dJ5cTGOWYnf6NDGEzvl02pLJaOh_n6Y3hDnTtNDxImHQ_XxyeqKzoxxttu_kVk8yROrCyKXpdYqVk.4KWp2F3NGBUmGbW3bzu9q27ZxhrbV.sFT1giCbzldZTb87H_8hE4F.0dyEmj7KRcR1Eazpsdel1wSqNH3GGlrc3Um4GdQigz_m2M0WaS9uou.1znX1sRAIGG1Qfcqtk6iBhuq7Tcklp.3uP3TLnVFyNHBa_z9EriH5vvnN5YfuJV5gGMsOfFqCc.fwHKvGZZwyUtmTHG3UxBlK7J_5uNvn7dgLB8ouqyHzOXzHt7Hfe0lCRMANgHFLlJROHRuoWUTXFOf3V3Nr41nC_5r37ubpRk9v6mkqVoo78rk72G_koPJ603fusaH.XOitaJYnDKhWZnb8XxEQC9k54FH9siveqCBLEPsGTzeGD12yvP4DJjVD.GxcEPOpfdtowDpZzrrWhQfcseALxud727llf6TmfTVZkb5FiNuFlVaGBLa7W5Dt6MEdY6nzh2FlJw4LDTQHkv9FdV.LTVdOocuoa2zOh_D2fv9vl1qyI9XmmLRNRHkAILVPiNfVpYrvJ4L8zpkDHnMkFW_2yLWFnfkSzWb00us0wuv6C0Qf9FXuColazqFMp.AOc8nCrKmJlIqFhSvbisfXHL1Zp52KTgG2toao8Tcxg3mwhtUVLQbsB6sOWPMxHyE6WnO0aY8OIKNQZBbFdEDMdQDcbG007KA5ovTxYzRx9NE6bdeUznrhqj07m6HL6.oj36q0.UOeDpxSPCI0MnH86qcBI8b9MR3cQ9N0VX4BpmR8saruXBa__9NZN10ALIZurfXQtYm5Ya5qzlAZ7WmQlTVnZZzgDR14Rt3PlMUnUbWkkTmsK0Hf1JyZ_z5TM02HK1o1WjJ.c4VF3xmT4NQ6GmHySOzwbKFKpK4KdTaigDCbiBBSUGXGMo6FBDQ9ARtoG5jhKf7fGjbHg49KDHbm2MHP_f5lriY_YvtVAPKYNsY8KuXy0I4Ri8XR7LsMlOsLlBeBWJG7ccsfyKwbx23dqF4RqiWq4pkRuLpv0pK9KNUpWcNkHRhvVBhX7ra5csFmC_OWSGXlJDtElzurTGSHE938yEWeTxuQUcmhJ5.g3I7t2HTmLqSyH90jb_dq25uADPZfDKuCsKgUPvrB7evxDrTBMMrPwgE3ehLpj.C45oCB1MUoktkMSZVkJwsIbsZniw6DooI1y1QPS6ArBaf2e571XofQSqu_PdQP1bCnFoQVtTfSid1wdXr.g',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96bb91c22e8d2f1e';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null,"\/kruqqmmcycao\/?__cf_chl_rt_tk=PCV5TECVqU59CbzqeTGWCzeqbcRKS5ub.hhkz4nPouk-1754619991-1.0.1.1-v_6kNddCYBnxYqXoS2bCaTo6emt8A5c9sWapUfFEyew"+ window._cf_chl_opt.cOgUHash);a.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(a);}());</script></body></html>
Home · About · News · Docs · Terms