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;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#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: '93ff1a19fe53c562',cH: 's1DyWotdaRvMNLYoHtfpPVNSrkKr_TEUN7GjjXiU7Cc-1747275058-1.2.1.1-RknwF8CXeo4SD1ItoX_IC1LWmfpnAcdgiPvET0nivfzJcLambkFLSvmuhfDUSZfw',cUPMDTk: "\/u\/zzhvgkpmdeeg\/?__cf_chl_tk=52i2xl93zQ9gDX_aJ3ksK58UJ065Mlaqp_Or9kZM54o-1747275058-1.0.1.1-KbradNF16Lo.0DyMK1BbIYMyq7jDyAwq3onIOKv0wsM",cFPWv: 'g',cITimeS: '1747275058',cTplC: 0,cTplV: 5,cTplB: 'cf',fa: "\/u\/zzhvgkpmdeeg\/?__cf_chl_f_tk=52i2xl93zQ9gDX_aJ3ksK58UJ065Mlaqp_Or9kZM54o-1747275058-1.0.1.1-KbradNF16Lo.0DyMK1BbIYMyq7jDyAwq3onIOKv0wsM",md: "4SdkpEsFB6IkG6qc10lo1IosN_FXAxGKcTM2lPN86mw-1747275058-1.2.1.1-vtUMnBgmzRAd6IIUMvBtrCy66KHYkdGf_Q.I2eEE07cZk72N96elAXNyRGRdgEb8DLgHzOME1Fl4FPIU9I9CP1QPXy3eFq_kUEmqf0U1J0w1gL4MA6w0DkZ0TXWZWTVLV9qb_QNhvGigRtxko580edly8fR0DUzT71stszOhUMG2XErXkJuOZBjaEGJqj1C.bM_Q12_sJZrseNhoxMlVg.7fA8t8wMRw.mka.6ZwO_uz.um3E_KgOh4qExds1uwxtNJ1eWCjlA4QC3APQPnBCRDTIQowothEBmKJ2T0lRfJUzrRBESCZjkYspuJSYMMqDtJpy.E8o2A9oA7NgIa3rsniRB4l81BqpJ.g4UbW9lb9cTiLNuVSj39oB_CmZY5wbHKcv0YmOhmzwaI9k1FECeEEH1KuPmSw8uyAeeCa3O4_sMjnnViDkaOoto.I3RZFv1X0FDWtvOqh3o842b7l9pegjFJacE8txOW9LqNL0TySP68w.V6OKc4Ig6TOylcluzyboQpi.hBYSIKCAzaBMSfDdR_dHvNtW8VSJCU79LeT77K_Dfl1aZFW2KA4kwHEzbql8RBA_w89AZKC8znO9XTOHzjgRL1lvoy9FXBMSzsb3WJDoj7yC2UY17Tr38re0UDZer2_eWBdtupqu.nDxraVb1DGhc0PHKP4Ulh_jjehi5RR1FDwQ71ncfVNG5PvUDfegNECpeFuBaOc4PxrYi424OX8f9jafwAY1qSkI0BfcQ9NM.R3co7At1kjJYchd6qHONqWQizKZtqkF9X0NK_ecTQR_bpHWOGoMRQoXrYRnpo5k.daNLcnXmRUlbe1xW63T25xujb4toc5IvPKK4d21X1_DgIHG8yrbpqMub5oagwFnyBSk6RIqUlduMpHES6lKhmFgq1GFh.DjL8MwEKZFA0TgLr3o9xPTrcG_UI",mdrd: "Ej3Ywg1eyjIc55Rm6dSDzHUjRYIfhB3IiUyyICM6dLk-1747275058-1.2.1.1-hlDmzbQ_y4ltAA9MhBzWm44SGsVxssif2.TcmvFIva5Qzd_57WbkNZwkDjFzJKyWMJxmk5hoKordvDrs_otKNyDOmDWrvheDmtQSvP6SqPmxCadawmwD_ZOolqjPSJhlH15qTe1I7UB9rgHo5Nm5VMPAJoyuaXwM42qPD7OQHh6cCMkGdsKfi7njeJYYHT4BGBBet9v5A7rQDDTHLfQyUEptWIR0ZxgyXkbS8pvkw41nG_iabpgJNDh0LJ_5PqyE_xw9NTmtvzKNP8VW7C7NEQ.5JNEMOrWAhN_jsB5lzvQjiVgb3HwfraFXTzAq5XhcOG0ix75_0m_FG3TunsdQ9lmwarGWKh3..XjVqUWWwpMlNIb4K_VTeTZ0tQOwPLl1RaiqV4QU84A6uSlAV7ML_higaGurn_v.Vd.6J0CWmfJIOUasO.VtiCIdHiygncO0zpRR.7QKnkKyewGO4P6NrCdMj2BK5TPEXd38nNDF5YRyuoMykDCqMYdOjBbtVKoK2nanNcayWC52O87Dwjr8ltAg6YXzApV0BUUDm_D6GgEBjf4KO0ZQFFQNx8yWEgM3sNtWbjc3hUSffA.ATVwLXqHWqsp1nsPjA0gz9WCwJF1rN.qBpkVkQInBgUamguRjUPqVnHo0Lx52arkhiJG3ugyMLhv1gKUcRUMQMZ5odf3d5bNli4FzHWLBFj5Hrn481I3Rod_ecow4ZQzu.FcDAuhlkIOzUkD7uJjYGnjskQF2K0y4yNZX92WX5r0zeTZ1BHC25l1MX7JBDxwZC809r5UJ.WslaMzx02W.0DtKRddTKKvd4h8Wu1AAOEDrTSx3DFMaJIqca97l.JWqr2SwDMgf69IztTKM23u8Hbu9xwa38cJjqvuUjP9lcYtiYwg4NG4IexWYGKBHceQMaLvOkCej.hR25ptPrt1KskbqiGfwkwxPoF4_peu6ZAyBHpiKEm86xx3FOBnCP8sw0ZtqNp9R7N7ee4iXmI0E2_MHZ6lCeIMggo_7fEv3HhPBTAZ2bCMMUhB65CMKl7ThIxK.stfJG3lSjJjXdqhS9fSSI98WLmifIuhfmocXZwpJ.lL58MEOCs64p8K4TMhosUn.4G2vLOz8sQ57nYL03aPuQMJ22PWsy5Su1hAvsMnJSgV4VVRoRKb9x4HbLRlK8QFT_krW4C2P5gt24q.7HeAwUlUMT8G.kG.YYHWoRnehByG7vOwXBIDatZLVxApI0x7dNuGvKrRPOqwj.QlrkVNUQExS2zIaur0HeqB.DyzjO0n1UW82JU8pv.37vPuD3iFKzUd5UPbwlTOjkT24DUgS.FmUsFShrvbQuxV4Wse.EkcKCAKJYIBgxaM3QIGrKO22IMpE.Qa6LgD8X_2OS7cLR7xnPudmj3QxOcwsyUZd2U9_iw2GnLdyXZa23V662Zv8tLlvIRC_Ar1t0mTTF5aTUsKG_EapfC27UNR_ylsixl29MfXikQsAuhCEAi17YAMNBvpjYtZ9BbO7Vs8PESu1ZlmMrPe4.5KPYBQpIq0jOfJzHiuJxHdoh6HWMkB2WZJM3_rSCZhYcnFnGB2vl.HXcmwzdJn0L6EmFVzEC2Ig77gS74IGz2._2AEEzwJx1SIN56NsxXPanlR5pXC8TfFCwagC6zFHxtiq9L9UqV907CLekwAlEJB3F5xVYms7WyOPVGHyBsIZr1HnSbPCpuxDQPvBMuflbyKfsvmpXslXOlaZNWKvg7HL9FmXSjvd.7NaDn5Bb0qWdk363PfCLg.jjEVD5uADuJY2tuSaRhRbWs5FyBrpaTjFjnMCZBsheSw9PWhihJUmtTaOQ40PIbLAp6BqvHe9XjPV5YuNunj5yanp2A8TXkYUKV9mJiW32uAVDA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=93ff1a19fe53c562';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\/zzhvgkpmdeeg\/?__cf_chl_rt_tk=52i2xl93zQ9gDX_aJ3ksK58UJ065Mlaqp_Or9kZM54o-1747275058-1.0.1.1-KbradNF16Lo.0DyMK1BbIYMyq7jDyAwq3onIOKv0wsM" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>
Home · About · News · Docs · Terms