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: '96b14ed91f507ad2',cH: 'a9yb3rrkVrQnJA.ZFDH.dwhkvzJGsp6xaAs_c4bA9gM-1754512393-1.2.1.1-8PDtwgGkmQCWzn2Sp7Td1Mp4yAzD6sHcytamTWiKVGW0tYVViec_67egrMqQhkwd',cUPMDTk:"\/u\/hdhhextvvurc\/?__cf_chl_tk=ee82zzig1RFgX6RrCaJzaz56j7SuUOWsHf3Ckh7mMUA-1754512393-1.0.1.1-lw__0_z37ZjVC.N5FueywJaZ1_NmB8BBKAgTgH.L7io",cFPWv: 'b',cITimeS: '1754512393',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/hdhhextvvurc\/?__cf_chl_f_tk=ee82zzig1RFgX6RrCaJzaz56j7SuUOWsHf3Ckh7mMUA-1754512393-1.0.1.1-lw__0_z37ZjVC.N5FueywJaZ1_NmB8BBKAgTgH.L7io",md: '9Ht3.B252OOa7eUGMYw22WyjCh2cEdrjtsnIUrFQr.U-1754512393-1.2.1.1-VFi6reU89Rl7na7tei_eFUZVE3PoQHs3V1CW6uGvIk04YXZ_.h7UoM5YuB7QLPzPVEMMlXBQ4nqItozJyYg6pmYkYydKxJzmWObwOeKb8jOsrQOh8zwDRGR9ZLcDHBrgtdeoQeJELzTnu4SqCH84eNrAz9RHIcs5O6PtByt7.8yYqLu0N5E3a96waVL2ZizOh9889VclGw5mS8_ze3qHwyBcW2xUDIiIOXiaJOneSmH6uPJwszTyMFp4dAoxaIwgaz8QAot3zmKj_iAUoi.dnDvCTexo0eWPADsoy.wznrrq4NOZ5h.oUt0QmTo.QidpsK.70OTEG9yBJ7r0efEEArKKW9gtq.H_clyYUVBosBGtCHefseY5A31l0COBtPLbf646fX1Vwn95Rs.onvUJGku5kD.HzGOcQH42kWMWgkM4YperpZLjKPH791zRaLsMn1cabEBHstASIP0bq_PxFfXsMXuM_ppDrdcGAC5c4lNgBlJtKDqdjRlHh1WcCcffvUC9glIM9w6Oq1RZNk2TYgeU6_.5ze8uFhVyF.DIKU2uGRTe2A4Gloorg_h8AZEgG_UqZ2j2IifRiAkyjQx1ePW2tI5ZaWRS5p0uAhnOmRTdlmwvN1enj9m4IOYTZZrtOiSDLMD82HhojGFQz.LZHSZYK_dJWC7sAlmR6ir1FTP6Skxm03jUzMLlWH4vzBKpBJHPNs8LT.JF8J9Ske.tUztXcCuN_dthLG_QVpKv_HIHt3yi_uWasBojIpmNN0ZgjYAHpl8HIFylmfMd0M15kGAGKyANuz0FIW.LyfSi1JmFRmDpncMj_uhpj1dvzJjdqSAEVx5WHHBpHQGSm23RXNalM7VuEGXu4OM2w7n6KFtVvs710ot6.BfUeKmd2ES1nvJxStGLFBv0UokWDmvSADnCWVaU6slrUKCfDZieWeQ',mdrd: 'ln4rTCBPJC853RcZwan6D7zJOMaIc2Bfr6ahAoM74a4-1754512393-1.2.1.1-VCUppsvnoGl3YmVv.UM8rYdv_avhaUpvz8LMdV7ZR_MGYX9p92G4XZnGU_5KecRqeOU5OhaoQjYEAPssa0wtBVyosUZGi5u77Rl_nRqU1b2QLQBw95th6Z36qUthBUq4CfUkMawWMR7KfxyvcpY6AAjgFmegnVwE8XOTM2Ym5YnBG8KmjkgPkAxt6XM.dh4MPccB8gTDiRnUU9.VbpJ0fU3DCCt8nJAP98RrcL1P7tUcKki7oc9jzHBMHuq0yMWd6mxnJm25L4waWa3OpvsUhBiYzsecGVfQmOkCoHNn32nSX6ItAEM9o2y15UWxqZAWAd3r9hZuSi0GHRAOksk453OuCimPem.Vaue3ARfGtJF_ktJfPxKrKGJvGWaEGnKbOL1pZw2KR6MEAOBgnYca5f4wCSt4FNowIKfi2d6HmjD0CWPwE7knudzDeOt92XZ9RiVATPCeYbN3MGT9cSFBIk.So_PWV.QC7Dv4bDxx4WaoNJ_2yy3R0v7Ng.ihV6fpLDwHGmUi5L1hCXy6fmS2e.jEqGfIvUzjV3FePRHi2eFZHZxSjRxGGlm4ouL01l3bIfkfPCVvMhcdt2hwW05jry3sriZocne3So65ETbaCnNldz_VpZQ31cdVThbUGIVOKzLcihcs7APa6oFmbu.D1ylJArMx5z6hZGmW0AiUE7K7fTXQqP1ebzq8yPrnQ3A_GH_XSqo3ZEZ1JcaIR96HTMnCPBiOibVWA1xQV9KTrJOqDJ.BuR.rtp6M_DwrtdxbaPp2s_kx4P1Q7x0lDBdaMDGgtAmXEi1dQD44LLFtlkeqahxrGgZZMm1XyWPRdDRr4F2wHWH7MQCE4SgtwtytxsbkJDNAHlk2N0l7wiOdtfunfVqL3zHXH4cD3zYQ7zjB1rURXp7uL8sPZ4GW8VraYp.vKgV0YGxdNnyZKwo00ZU_DUGs.6haEzFhbqPAhK1L0DWWHEbWECt2IbtPHZNgMVIMCiZgAwJb8DEIuDAEwHyOFJk7IfYMNlqQ8F88H8ct7RaihrDF3o0LsK8qQemf7fjsNDbsZS32qnvU3UtXaeybB8ZNaPi6zbjF.Ph2Qw.y_g1d1MbfffIolpsMfvFJnr7N4ZBWfQGEsMSBBz.HV9l66KrMWmSD9wFXsFHeOufPDhfT8K92cmhSzf1Qg.afamNhk0kZ9qaXcKHpGJBiTc3yyAnbBxDlGPyGNXYKTP7LndXHwfvXxdRGDIJqgo3xEbsn0qR60L2IsctLCGnvN._XdnANVdjvk5R4SC0xbi7AmbBlY2ZwssSaJuUzzXqo3D4S5IBNcMWavbEApldSrictCART1jrsyP3DqEqYBQLhvuizMpsyi1WnkAhNpcHxY99m853NzFtFeKvOstTtQONp0wjHFeppxKo41D8chNjkvR_Oli6q1p1wE2gIvbGlpFHP1Vq6Vt2nCd_eYOmnkKrpF4gfAqnLr9KbwFw2HDwNK8NzbsZA1ixYcDhXfeVipP.iGUJWO4zjjJ00iAbhoBN5iCJWMHIF7W7WVy71Omq23A9VnXBw_TkEaUfINULh6qb2S1jJUn4DLn1OcWRdI_Eal4YQPVIWajXqy5JcLIIYJ641VFb4GnMEhEjf_bEh4XES7QEs0vtV7LgeEGaXyD9ZiD3NTCk01Zin7PBgvlCtG2.QYs667kUUWx4i49QMZM_uVx.wrpTioA4g3AfZjRzmHtvhqegaAcYcPEFiVbRlor_lfVZK39oCz_3f4icl.v8YpB3bkWMwC9yMQgLpNEI1sWMyVIwKYPZ4wkBkEo_YFGLbtxVkkJhiOrt7fWZdOJcv49oSXKEhmfU1okNTSqoOHGXTF6Zs4n5bju2b9fa5cefhdC6bbljwJ.vEcC4oJNC3_9sHvU_FbSuXdHikj9M',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96b14ed91f507ad2';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,"\/u\/hdhhextvvurc\/?__cf_chl_rt_tk=ee82zzig1RFgX6RrCaJzaz56j7SuUOWsHf3Ckh7mMUA-1754512393-1.0.1.1-lw__0_z37ZjVC.N5FueywJaZ1_NmB8BBKAgTgH.L7io"+ 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