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/lqtamtzsx/

  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: '93abfff0df62e5f6',cH: 'xSjfD4_4j8b3o4mYORlTw0L8lh7ml8_NPNF2O3mSDYo-1746403668-1.2.1.1-QVJou0w.00o0eWgRnuatEOigAtEll.gznFvMIGSA_rxdPDbP8gw_fK1ubBkWi_gR',cUPMDTk: "\/u\/lqtamtzsx\/?__cf_chl_tk=1My4wg8NfkeAUtQ62NcnVmKJRa5_GBPnhT0MwU8EbKA-1746403668-1.0.1.1-q9.Fch0Dl5ER.lOdCS_o0Y7mOXYuOSJADhfcYl3xAHg",cFPWv: 'g',cITimeS: '1746403668',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "unsupported_browser_beacon",fa: "\/u\/lqtamtzsx\/?__cf_chl_f_tk=1My4wg8NfkeAUtQ62NcnVmKJRa5_GBPnhT0MwU8EbKA-1746403668-1.0.1.1-q9.Fch0Dl5ER.lOdCS_o0Y7mOXYuOSJADhfcYl3xAHg",md: "zrUXN_mhogr0Xgy4lqokJ6ffX_aaeAb7qgD1SIQS6RI-1746403668-1.2.1.1-8CsGFreHttADi5oFGeG_M5wvi..6d.vUUKdVpkkSfiH9_TrPEAdPmm5pAIsqp46pdb.RqZwhVo7jv_awTLPJzIQbJ4Q7Qo7EFovPrvtVeIm06u9jwpx3VVCsZi8b15l4HZ9EVvXQgSnVdMXR99o2tMJxg0.6BZz.ecWLfK9K4ZVdhXVOh_V_oL8IlgjjvSrXvdV46Lc32yuyZaCM5dWVVR3mL_8DGtZl2T9kbCU7RjacLX9ip0PgxjKCLWifnRcIgPpgPzjBs4sM3y92dzS9q9AVoJ6GbMf8NA9NiqHod0i798iNeC2g7L3nHgB9KQ2gkmfVBaHJwXcqcVzKBbWvZurGZWKFKL2wdDV8OWADJAYiG.fFu9mcPCgv9ynREuUJdN4_JL46t71D.AtGGg7EYp0.LQOHHiP53VdBh8XL7nuJINMHMg0nH10fTAGSCqpwGo6aUzrNQ7a.P0cGOz_Jr.SYyl58S94rV9WUgTK9b_NWZeJplg2jgJiwepf1r5wGl..vKykM9IEEZ_gYDPaWeO25wgNnLAVBNqVCjlHLV2du7PQfgAFrZl.UhgoA4B8..z4jQ1NRmxEPRkUdzS_SlLkq.8EazsRdthvkpdkxr.p_lD8LbylZLyc1JRK0wS8GGUPtH.TzYeUH8Bfj.924wKR69BBh.TeICP6ls06zOA4VhH3TizpZwlzexnRRrnY3KipxmZK5va.MG0kYPJaakDnfQV6p._.qV3EK7n63FJW5O3rw6tmVMQcTM92PeZffCdVuDTOlqyWOsQwzbP1RsTfrbATuZmOCze4lO8_bsDcQ18PhZY8kfdV1RKJwYDwteSqT1B.KymP8jO6Mypt5OXXzgxla6QZ2prZwXY2Ida.AUgjmBbds.iirsa6rU5rAC6cMDU0nmT8LiV4S7P8HjCovEjI78u6FEBsGIuqY8pcgriRnsGeT5uzZKYG8K_8F2DPduPsYx8Z1QOsTQKhE4TevofZ6qZdntghbV.VWOnE4YErzYcUpqMlj0zMnWqOG",mdrd: "Pbmpaw5XwY19qQfhMtvafvF8KEQRXA7fc2TAS7v94A8-1746403668-1.2.1.1-Ojij2WlI1.y_DzHDtRFhSBiEjSK5s_0KUSE4hn44BCHvCtn4EUdZisYtIk6oeeTGsWZ2W5_BU1idjj6l4LwjZm3QHwDTuRr1sTCkSCLxzu64vIlOlqDOArcQkTOJGVSxdciY7z6VeS9SUfrN536PO8nJ1HUe36yj3RGNtDiZDtPlH32Q2srBGIqJwQeD12FaI_sv3N3L4rgf3h7svy8U_3n3GZUwLxTYn5iOEYQOWj7bgo1ZMhmXo1GU2vOsJyRXBK8P3cIeNhrH2DJ1rnSIKM5O1KTsbWPsFh89AVnnzI9vF6lexqJQ.6tmM6Pa2xsFg7gJcYOnotB2Zz22FxofIxf82WpB8hzODeqzBrdAMQY4OqhRwjsNnbPt3YblhurhnavhEHp8ZQYkI.Sqk.IjHenBlOT9cs93SAeD2lDsXwt9TyeqUGTvjh8QU6bDL5_hNGXLyMr1sxQrx37DXN8osthY73qu_uXE4EQEouzM042IQTKi5O6.4jSneFbxZDtXjgVEr8Em05uhnCVudbRT7ExG9mTghjk7qoRmKA42Y16qtekFtTfLIR6qMm5VLNqgsyfdpuYCfC0kWP9CybiEQlqt9acCTyBgwp763yeuicpuj2slBE8xanmnDnKU6vJxgoDm7qf2cKa9uz5xxxIaoT6WWqenqulwuK54t4CBWc38QqUH515u.qTWWX8cwnRakUVEwncZWlRS.lO5WXIssZdBrq2a_to8xG2zE8v6aYFt0S73NUpzezJf_CoHCLK5tYqOXsp_9Q1.oQ0pUCgJtOY.ryGYp6phULeHPIDgHbq27d.ucIen_mOYyG00WfWXLilwLba8nC9XTOqQDi7Dl0RzhSFZ5Auivmsceh14KYBm6VMZVHV1yEgT5lCXz4FGMHv0L_vs1xn0fRxJ2jB76Sieh7iG3sy455GSzwNrEMBIlpTZxoGNBcnVqHDVPTZSGzw3B_rUhKtMi9mfzxwCwFpFsgr_fnrNUNWtwpwEVeL1iHHBcKClW3OxtIQm.8QyIKRbtmbHvEy4WLoSshM3e0kcsY.eGSkKMfH3m.aOSRpW.gv.vRnt3NDO3g_ZdV164GeBoC.Ax9oR3UY_W7JCTHG8S0jRhetNyf7H19lYy6ylaUIthEob1trxDfZlAGR8oweXVsGQ3g9payj6I7ut4t02_UO9hM7hPiYmkU8h9XFtfnTLi3xLRnn5hpgCaQpNBS3eecvUXDGLWBkOSY20NqFpM9suI9WkoF9mTODbxetJQAOnDL50r4rkSCt1vvyfGci73gZ9TWZ.7BuwCtqTzHyiTIPbzKPZSZ9VjRpMxC.OQRbKQK4W..ADNjyq1N.FtqBNXl9sAfPBlIT8stKPZGYlem4XzPNXajLAFSNcMEC_xZ0WraIjwrph04UPfOntoX3lcLkR3hNeKZiD7XwnjYm71O3Z4Vh2HxrmL.TuVErZOzYUjatOlA8jiVHJgqSfkPJmPIANUf_bCL32R0rhD_7KxhzhcuoisnySS4VyTxYAG4R2UVGsWA8va1iJTcSYxBQ4oy3F4gAsxIMdkMtU0Jc37LkX8zJWaf9fUhtS0W7K5hiCLnGEjaBSBqqERpYjZqypDR0NgLSQ.JME7ntMbADwOKEgEE0v93togbwhDTdYz2.4FhvG5jQWxZTE9L3rnh19zJWehRqfRXWDKmS9RansT_wuB8SiDhcNr8PJ8cucAngpmoPnMTXwbghGLq0pdYbc8ggJ0gfMKJZb07GQrpm0p_8M1A8_68SuFZ.cFXcqLV876vm3B0qtj7w1sIAflnwC9jcChYHwJrqsIPcy5sn2wopyhzRDdT64XK6I1t0qvYqWLkQa0oce3M9XZLlN"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=93abfff0df62e5f6';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\/lqtamtzsx\/?__cf_chl_rt_tk=1My4wg8NfkeAUtQ62NcnVmKJRa5_GBPnhT0MwU8EbKA-1746403668-1.0.1.1-q9.Fch0Dl5ER.lOdCS_o0Y7mOXYuOSJADhfcYl3xAHg" + 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