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: '96b0dcce3b7d56e6',cH: 'jMwfYBVj8MRRXJEGB.qNGKs3Sl35bC7aNzgWvEUbOgk-1754507721-1.2.1.1-Yfd2E6WCfJjlNWVYYExx0B4hYy4OGRfatUg7HdBmLOnMG_eilvXSiw6Q0wlHinHe',cUPMDTk:"\/u\/qhqbxfeyvt\/?__cf_chl_tk=nGewyT8s2uIIRR_I9EHwxvgaFtPjh1YVEMECuShBONU-1754507721-1.0.1.1-NvlrqDpvz.QzU65c5jow6i478t4MOMp6wxcls1M3YK0",cFPWv: 'b',cITimeS: '1754507721',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/qhqbxfeyvt\/?__cf_chl_f_tk=nGewyT8s2uIIRR_I9EHwxvgaFtPjh1YVEMECuShBONU-1754507721-1.0.1.1-NvlrqDpvz.QzU65c5jow6i478t4MOMp6wxcls1M3YK0",md: 'Dku4ngLVgmbpd7.UwVYfbDQKBTTU2S.cHkyW8Cjz3RQ-1754507721-1.2.1.1-t.4OLjJJgpkv9YGJNhow9VlLdNQNsMvbZnObzX3CPdSEgfV0QUrE_3IjaJe_rUrdIWAuzm1Q6KByYfDY04Y_ALw_io6WgCgGvBS1X4CSZNyo_UsKFPgGzRQFYvHu6ecQY2eOwkm3C7TcnavgXTUFNR5hHgfsgjMeNovWSsGk2JubWlmYHWTekPiaAPXx6fGCnpD45lDlZcCBVui.0v8yIzIy1KDYkPuLfbAucVqlbYPZXUYpjARHHcep_8i_ZYJaDPnktMDC2REJc.l2Y6WPoRxJxYkAJqIMlLM3LwNNd35pnqfA.Bfao6F1jmExNSXIc41N0g_9fyv03qxEGse59sogdh8kE5dktukHjTY0c0Yz0NeZbc1MgnVgVcW0hw8XTEBm8PGzlVX6wmVpavCsFgPllo1Yp81R_Kr5Zh10aTx_bpmHg6EM_997eD21DMszVFFybsJ4zyRSwWVDCPs9MvYlM35UJ4h5Tr9P.Ro0GczSZsJVb7PPKMEmEkSg8Rs6lmQuBZo_cmvoVaEQgNZ.biRSJmfdSStUEMFRw1RPaaW04QrtCjpegznRwar97EjGbwwLkfCJh7vgMcp1F2RXSy7tN81TufmWMiZ93t.PvC2h.vT5VYvofLVBL02TzOtrsXKkpfEQky_SKdk5lEkvh6EtGI51vNirM.VPfFEg8prTYeX9hzDJjv1kmlhez5pWJ394cdtNxUmjK8u5nVFbr4BO..aA7TsSFE6H5RzbFocv3uobB0_8XvlqRuautooGE_k3STfZAmhrZeq7Zwi8U.1CrBaPSD.SR06OGjZ.oqFtoQsVRGenRzcF8SwhMnbyj9guimzCRHm9Q1dS9J.CJG53NZnkTEoLs1_KPAdILCUMpERHIMi3VmTPSFDHKayr80Bxyl9vXRrpSxMDwYEsN2bc7Wcsk_7VaFAVAeTSH3c',mdrd: 'sXXcN1ezeFFMq0Ev1xb3viBJoH3_C5rKOaNijKz4ocY-1754507721-1.2.1.1-TvEjCqmEeFf9jw8mJBju.XoqfpiUEvdeEyxpldYDdI4_oeV4.lMA6s0Uul0_V7GMlLzWVs2OJUR8dWaE4aQJSg5lwWjOLIHh0Hk1eFgq787aUrsJl2lHJiP0yhMAGXsYDGVGtVvxAGyoSSVMKG26VSNbcDlWvDSuVRHOdRN6P8XrkIjujMqaLYxHTvKBEqtweFeZ_2buEvJlqG90HCa1oxgRDmUMnYy8NIllho.YunNVkuKFB7JHXkvBNkFVOm6gBZfKEeqClmbXGmvOg9okSIyGHfYxJ.fUfLPdQ3lR8..R_F57V6f6Z1cLLr2xTkYKih8Fqd3kBQzdBI7tJQo.CDJiQrfAMlxGeACKS0n0y6PTCrVnkhhuOr5vovaEwpQFGa6ZAjNqd_rA4bWEu2YPz.igXq_yk0UZ_4_fxe0HdiWvpmC8V6i.kUPrl7ugn4uWAHJwunFTJc2UQ38qW8WEynGpblRqg1KLJuaYEvXIVMcsb5QGA5dCTYtnorBlwN86qtm3AJBm8iqEIeTZ0m0cbrpGZEjnisFa68LY_Ey_GGgSWb7mqykJnkhd4j5wfGF79NEOJip9sV_brqurE9C3vd2zNv5zMhvzUzyFcjfW7Pzi.NyCohGP2v1wnUaMsoD0NcYkIHTl7RcTuV4FQ_boz6ospg_XKPIsckkAJQnONzz5cr.o_1kasCe6ci.yqrwdrA9wP6w2K43GAuU2dw804NBqmkwxnybdqxEL.NvGzO5g9JOkyS.efIE8zh_yhgeucImT5HMzoaEtGoYd8T1_Jyw.Ujh8MvrMcPg77RWJBRqqe6MFvvEdgt4AVqNcjCfZBwSSz8sCSXhN_TL_gvKPFyb5KeE7xHsbUdVO9s1zvKVn1GIdN90p1VTsO_mmmHuLv5kn7A_A.6bRHYEvXjz0E8ytJEAh7syFWdUvwbp..1H6Mc5dq0fmI1OMyetFuVtOHMS_YItsU.FuY_OXsLC0rqmCuVaVeLsVxZleYkKBCJQksknh9OxI1juTcvAzLbDHqyPrZSnW20GxTRpxZJFQG05tkert5rGs5qpzvASXV71MT9q7.oeQCx2t3tCOccLlHZ2lnqRDGGe7pSpyXiKzoBokDKu6zB.1LNJHYQP9XJRsuQfjU3Ip4He0adcpNkeQjTStajvJ8vCTqnd4SXH1Rp0gv9nxYjnCIi5PJSgYQwwYLDxEx7XcVAqAZC4MWEngEfl46EkRLnkj4fWCqwq0Z_UaKYEoZtMy51OJcIdggVkJJe.jgIHlbb8qGh_Ll9VrW1phsOiH7r8f6_Yf_ijMepdntRJT5hJIcYBdktGVkzY1pzejrPQBXfU86GOZEE0d7pTPURxATHbBE09bXtUqB_EdN70Cz.fA5hQi7pmqCA77mJWNdgYqoKffGCxLy88n.L3g_oBgGR08k9ujV57bb_6wXr9yPryr5hEDzk6i534_QKIkGh81Suau4fL8ycCrEhqhubg.MfOK9ML0re.D7fbCbpPldRBKH8xCEWgHnYO0TD.LDwIPDok0NRubQ2_s5V_XQUyEbfJOJcqJTsuhrnAWOsc9tDTUBPiiMjiLL5XXOvZWUEuZSTanyB.g1vgJl5qDzNsUd.xNtlahWxHEnZIrnCX25tOkCn.afVdsKqfr0zNUeED5FLdyORKfY41L6LVGSQ91mp1UZYZnNr_M0sQq.5mWExAHsTvTTduOZMADl.toi5itZSJ6YTRuWLdo6WQoUbtS_QDxd.nbkMjDi7iRaxx4eDJMcXNHaz.BolgypldEuww9GbgHDZ7Wh4iTw.pTkrrMtw0xr5IbBJA0FhldL0vXebJ3bf3we6_h0JVDbA.lOJr_r2vwEdCsB5KaypMp5Y9XJAqwFW0G0JFk4x2pIkPIqPlLPjj.txwOzT8',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96b0dcce3b7d56e6';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\/qhqbxfeyvt\/?__cf_chl_rt_tk=nGewyT8s2uIIRR_I9EHwxvgaFtPjh1YVEMECuShBONU-1754507721-1.0.1.1-NvlrqDpvz.QzU65c5jow6i478t4MOMp6wxcls1M3YK0"+ 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
