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.

Source: https://leetcode.com/u/fmfjpidtpz/

  1. <!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: '93abfd94ac7bc5c2',cH: 'MQ7aPOqZUhe2Cqci0vV64BNPP5IDHgD4bwBuG2iuWPw-1746403571-1.2.1.1-y8CrOoTgtSXsRDwrpcjUGP3SaP2VYWhlwwcoucRUHVD1Y9D7PFn7sm_o9RTdCVQ6',cUPMDTk: "\/u\/fmfjpidtpz\/?__cf_chl_tk=6dD6KRu0zmEq14DGwVoIAbVkr9DYqEGoI7lL7mVh8Y8-1746403571-1.0.1.1-AqYmPjczsufGk8_OBS7pOUCpeqv56Vac8jl4W8aBizg",cFPWv: 'g',cITimeS: '1746403571',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "unsupported_browser_beacon",fa: "\/u\/fmfjpidtpz\/?__cf_chl_f_tk=6dD6KRu0zmEq14DGwVoIAbVkr9DYqEGoI7lL7mVh8Y8-1746403571-1.0.1.1-AqYmPjczsufGk8_OBS7pOUCpeqv56Vac8jl4W8aBizg",md: "T56qD7XvJkiaQIDu4IS54S6OkPKujEAaBjqns2._vJA-1746403571-1.2.1.1-ipLcENQLYquFLILfiezB37tJh2L3KZwdf6F.KK55Lk_SEx4VbgIf.sKQq..Mf.lLJeXz9cPwUxLJtiKwEXtHZo6BZbkikL4onFjFop28to_riTKK4BGipexfuEEZHCLHbtiG5epZCGwRkLSn3l1RhElLRubrc6DbeLueY5EYeuSU3CPIjKzX8U0Mp91p7tzqdzHjva74A7OIgFQpxc3ypcpJfO2zI00Wvr7pybv0XgGCnP5LowQU0rGfpkjAQ5SLnACTTMCAXXAUjLUMz.hk8kgJ82HWaPqWH2awd1hO_XSJ8EW3NMxgw2BzCitEtmGqZ9XVED.TAvwK8FOSJtPEOi30g1PzKwZ7LgVicn9svZ1XY0i0vRveyZbvU.vLPeozqyCoiqhiX5UBTDbwwJwHpIsRByU1BnuZPD8RrYk4KqZBUF0HiropwBEhHVcOlx0SvWfGTPqvCEQWPs3QTlA1ThQQooUWQqUmImamsa73aqzTqLS8GYP8FxX86eI4ixkSaqOPd34KXJuRcBY4DAvD2pnErQRF2hIysYvNge4B_GHkUdExbFf66T2XLiscP5zYeDq_h.wlssbWXoP_iTNgzAr3flPz9BYLqAyypk3jBDFqjrbYoig2suHg6nVPJSU27ogxvwtlg.TfCgPXkoOhblKVePapckGPfMExQbpwogKCgCQZJw6a8twDRT59AFPkoKKmVqIIod2WVqgneuOC6FRLctJdYf2OlTiZ5ooTtiM_Gn71cgDDDlS1Lzl9a9MozFCp_kuG4aK8GGJBZxggXu5KaqOlmiixsaGg6GMIoJRO2_13qXAoEDtjxnidgucegghZMrR9VBGv_EPbszEhZ1VSMWRHqVh0xFh0a4JdQ3ZQ17ZGrNkLK9e66iB2cNTygNoBuvn3OvEex1DQizjNyiGQHpLGg8RQEDaPl4MwEVmC4zOnr59j_dTsIExMInG3OaOOAwCithbjG2skx2yh6bBf3qY.MCLe5TLm2yPnjA_eHTZvuSamEAbh8ZUJcJ0.",mdrd: "SL3prIuZOeiSnE5MJG7clhuwgV9ocldYihAYuytE2XM-1746403571-1.2.1.1-y24jpPwj9Cao2P1eK0.YY.x6r1YNPLa2ZChhuLojDqyZSzJth7yz65.3imwHa6YHLmfRxSY4yn7xGTjdNq9lycbMpHp9tFVKwGuKllQje8ZYrh3F38coNK4WrlLCQfF0xvtJfjJ4U1jMbQ2WB8HoPBuPBbqsR0lKdv4J9wXAjGBwTagaFawgHjbQNC6pSTfvF39j2OsRtDP5hZJGxWzMc4z27W5TEjPfevfuwFQ1BUC_nNfSyyxOI9dBTmPgduYkcry5c54xrP8G_7u1NN0BRvf3f.8gGsCA1o5sYLk0xgtaAtrpyQYQ3SsLhnqWBj1n0LXgt3_QCRFdBGenBe8wppd9knI03wRIdd_bvANZ4ny8ZmOZnRX4ngkls5UPTg_PFHqUggQ61rk1wmCTmoMTPyE8KVnjngMlxs7TtY8j2LfhR.k7CUZaMnC.lxPXbquQp3lHT6RIslG7LzEKgigITjWDDMoIwd4lgu3VnVq1pULlmuISTW..q4.IIlN_Yg_jTfDddo1IfMXWVN.tRWg6y2WtTMzYGEH76VV9i5.2lNhxs1N3sgeTRZyE_sTgzzMeVnWgm4dFQZdDRwZCYmOe7XUQqY6jbKIQ.SGd56WcqiSsfkvPyCxhxNaAIWfV2QJSN_VVNrpwpwyTZZ3NLGTa5bSzVLyc1E7WRWXKBXBxOmqzzgqLUhMMzhrkciYGSdbW1_VnWZ81Q_1zE1mPAaL.H7I4Bb8q40xJsu_1I5IdFdVFuHq7Zl6Q6MwjxvF15TE1ikomHQpwF1_s_eR1rGaRhUqQuEzX6JLwvbIp7h1ftFl.QXlcdS7BNHkOlJNksOKoZQS5Xfat4xLVUP2GDRATiK8oon7wCWJ.Dqo8MHO5qwY7_Ey8.laRF2HaAC7gEa9esO4BMpLmD755rvBasPOFnwgmP5uE70MNbEq9eVvLIOcGHqDmIkt_kSr1vs6C9dcYPG.Y_0S0wIpFceGMKQXM9HEnJU2aNDoUpgqszpIA85bh8XYUan5kP7u.24UYsSue_o6z57Uo.Akj_8_wXjyj5z__FUPUnyj8.k1W8VSnErkAatz7Yv0TRDuWV3w45FgQSNWWOruTZYWxTSN1Fnp25wARPxCMUe1t2qlW1zpjLj2IInRmsKfL_FVFN8YrMHO1i5crUPca5JC91F_TC1cBTjsJBYvvg5YJszJ5eK0SWkzhQp48m64wlOv.gor.9wOl8IqhOpZafe3PIoP3hbfQf2x7aQ64X7KBFZ35goQKOIS35Lq54SDg.J79vCK.a5siQ3R5R2Y62eIQLXxOysty4jTQbPMG3DwqgHmTwTRcIW5R2NTaDjmkvdNCwpl_ih16gs9P41pu2DH8ezR_l7pHjUn0ztuKhgsdU2O5sxqVWeLg2AMoGRYwPQDUMdxEKpVxvcd_4DvsG0GpBi5MMvDir5yvywbER18btY68IYFvM594B_P694yewD0qhPcge77Xg5My4EPioDGOwX3JTcowOQn0ALWNSRTvXhxsy8xc6kM186xY0VgbO4G5Xdbr9TnzNB7RqKSuNC0bBNcnx9h9ShJ34UEg1mqB.c6rYmpxaeee.O2ZxmD5A_tC99oquY3UKvftkTDcRJpiyEMePNZyyJx6HQEfPp0QTDsfYWwGqz8iRj4OoHFV78uv_xvtResrHe8EGlaxYXuNpZfjYJqe13nWwwsXcq4JAkt1AuwPv5belgd8bCD5ulzOio7_d0BmHo3R91tkpzyuSZtNEsiKxQVd7w4dzFGphySCqNtZw8k0zBf070p1E3WQxbqp8XgrRLU.5iWEZmiwmNSY_30JO8.eemRCzFDPv2zxH3_aSc4nQBGB6L2miVXx55uCrtwoptb8RVdCdTHh.XI_5zWqrQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=93abfd94ac7bc5c2';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\/fmfjpidtpz\/?__cf_chl_rt_tk=6dD6KRu0zmEq14DGwVoIAbVkr9DYqEGoI7lL7mVh8Y8-1746403571-1.0.1.1-AqYmPjczsufGk8_OBS7pOUCpeqv56Vac8jl4W8aBizg" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>
Copyright © 2002-9 Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda