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: '96cc0afe9cbc3934',cH: 'LhL.mhCvxuw8pa95uLDGU.iJHWnIVJ6bIzlTYhalkMA-1754792729-1.2.1.1-xDF4_rszmkUSPN6YhId86LiJwb21UcpOlbDGQibDABinZhqbB7lOIJxDMC8ZwKxt',cUPMDTk:"\/u\/kfrckphbfwimy\/?__cf_chl_tk=CxYivTk7xwgWlVOXucbYJyVSIoEryYWfzh.jImCaTe4-1754792729-1.0.1.1-3AWcvY_TgImXn7RTHsXgdA4p51b2p4AgvFqex6zav_A",cFPWv: 'b',cITimeS: '1754792729',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/kfrckphbfwimy\/?__cf_chl_f_tk=CxYivTk7xwgWlVOXucbYJyVSIoEryYWfzh.jImCaTe4-1754792729-1.0.1.1-3AWcvY_TgImXn7RTHsXgdA4p51b2p4AgvFqex6zav_A",md: 'hJFuMY_DKAkBXl0tLxBMaAzVsEvfJ6QQw6ZmV.1V9BQ-1754792729-1.2.1.1-kAGovdZcZv0IqorbrXvFDMroBwtDTztd4k0L68fGUuMsjAvXdY3Bi8ubqrlfu_ikhVmKjQvxTrqngvmlLBS07TGkOZBk6p85QfjUjE6dfNJMx1HSCw2FlZLbdulTohwtM7tFyKDIY76MmpPCOvGrazvwB5s_yon0X7vJQ8JIATANBj7GjooIVyfHwruOx3AmFFZiSt7wQ6lDLZvx.a0hXeqGhvQlBocz5sf1U6SP9q2T_pSnXXDWr2F4tVuhg71bl7MP40clj5Pxy7w_bqYTSE3TA.WeUi1vCXmL3UxnQPmtnjIJShunDFSvSx6p.6aZzb8Ba9IgicfF4Tja0aaD9IMZ9krRcDNJVZwOveR516sy3FXI85zq84.t_Sdo71IXVVVvc6EuaF_PC.UEUu_tJSMjnjfifQDVRB5yX58KjSvrhb2Wgr1g0iPvcIEeeYQOh9tVoX4qOlaIe._72P1RAV.7ujyUz7nJetumnYKIr83E33iCQ2LE.jcCpSeM6LP.J5trDsesXG.VpeuB9RI1Q1NbKuMQqekKBjphekB5ktiAxYSeUUohRPZd2ujFmen9kAon9xTQNtWvfTnzDQmIhD8bN904fJsHy8Rkm6IsyYt.TYODRUp4XiY1KDDjDH7JDYuyXx30vExaa6axaPcu.dXDBrTl254pTsonIT8d1XRQL9gz5KimD7scXV2NafLTlsvSuyRu3btr80E06b2uXuEOYSXpX9X9qeYKiz4KaTXqZCUCRJs21BZ1HabWU6X9hoWA8bphSel4JfpTY7a7_kEO3vLDwhCbit_23henwzyANt6px4sl.IqC7vkzO1v51DOjVjkllBetMIgVnVO1plBUY9o1PRYrYB_JYlFAGZVp2xbScF.sFbhfY0YFD0Miu1.wrix4CRfCHrnhQkVCBu.z_o0qFKtEYLySH3dE1W0',mdrd: 'VRMSRr7ghvTJrfXlVRHIXRzwtZ8D7Ap6cUHsnnTccO8-1754792729-1.2.1.1-_KB2bRG2oAKVt5tIw1ycImtmwV_ewyfoahyvkAo4YWFSU2JF506i8k.ay82s388c11a.lrLCTeLsKVVLQZJiJ_J7RfsJoZpaGJP5FfQfr8gXtS9ZK.kAz8s9ECkmtkb549sTzcTo8Rn8b4I1BCpGgXGJXpnjg8pQBksolylilXbnBVzeV3toatZrr1u3fMUrGdzEkqxzxu1xdKkIWhtun6kyeX0VBro1O_1Ufb8Gtzb4MVattYnn5ONq5s_mmnIThJLzDnBXwNsM5Ror_30qkyrgyhwVRgBl0ypYNCiRl4PaSf1_jpMbqUFj8vI3vs.Wa918f5CXDTtfD0nVI5CpbeuO0pkkiv6Dq3AX7CZYzZyk_5m_9a_sBPUAWXsZVNSBrvRPw_hH0T6lvwWpSL4nPkbYFJOP2QOy5rg7cJhIhQv88PcnwsQELBNMZtZDHXW_WSksB_70P3jphNpaODlUdeap82WYNs7N5K2t3W3NYr.lscJclWvickAzkJO1JWvsPt..SDd73DJwK2F4vNKFaCEuu4Ur1Il2Uwe5GwCdGwVZmvAZA3qA3eqtMEO8L_g0GuMeLsE6YwTSzss7EorXRlUCPPhctLlmynfmEV7LZ8cym_pAWDPMXsoVQsQq.b5gp0ivONLhK8SRbk9M6ZJlZvnrGwsu8grkfsx4UMyvz6b_V5dx2HpIXi5y1kr1eTRJxTP.1Bvp_eh2IVE7yhZsU7Z1wx9rXjrQ3bylHJLPsEwR3__TO8.CfC9MRAe1KU4d2SPMmxAWz1MpmNc_q3VIlUUpmXjkkoswYpkzEJyP7CdPrYqc1TMP6x4shjMOCGJcZbBG50qU_xXj8vuO8I9OTb8rOX7orMJVaUkqp2stfYhgxGMPLk12PPDRpEwsjIJjc9l_4VEdeHe4uA7D7VAPTYSZ8.Znay_8Ivz4XDwztKrmRTpT7.faNHV4W1Tdk_s6ivmkgfjjBe_91fETrIsXS5KgO0TVfT7nBYUCJr2ZRaMsRIeDK9I3nLiJLZKB45LzKskIvFfsis79HdXe_QoasIegX7g7UZ0_NYTKGUyobyPSuF2HIdjPQz._r26uNz57gBZXzZOcnms.sDhqy6e5n7JVMuHCan8yGyGnx5ersZgqJfkHYMMudjLbYg16J7aIUSWDmofKB0nHWO9U8s9rnKGggd0TsO__wFAXYjayQ6RXXRwSuPBfZsAMRm2bzpBS8gn9SMHHODgpSL71Boths8_iVHJ84geWNPmmhNqtMuePibcS7Y8xXUiWu9KGLTpERSwW2pZxlfoiC3Gy6DL6CjzduJ6IaOpIa9zJIT92FugZWdt9pc8G7ELJr4SqjGHkz_SGWrDU40ZO_q1v5XKNnu2Sc8AHMUfXd153juLv1z0mW3cq2_yr_5l6lTvbWKMP0qRhlqKHNNpmrVApwMvohJE_LgsqRw6yXHBbax5YJbbHHRXF9cD2QzoaheZtMcnIDB6ti4tgTIlSN6.ZDeH4Vr9W154_ADCau.VPtqWPbS63NHNZUGo1HB.rOlY5vKidxsLbJw3do16MG5EJ0CoQN.DB1JVr1lJgly8xapSzY1aRWGss8KuVP.8FIK7656E3VY9dRgJmWGNXaH3mem796JLefdHgbDz0Tu2_7zWLTl97TG7idzMAuXixzzwjphmoGAGmuDkDthEB_P1tcTrREwYtWzsMMKLsRcM0PIhV7lMY8tv1KTWS71oTLKZ7Y7A9BDvKQISxMmAIjOtqTe3SoFWf2PCQA7gufV4C3VwOM56unJ.xVkcOovI0o3IGZpL4fDPLyKHiagR5I0zpPypW5GGVN6pMAMQsJTSf3QqiK9VAafhXeEtXFTUtp3x2uHpZqDw5DUmIjR2SYL9Mm06zv346BLz6DId6nHRaoxhnudk',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96cc0afe9cbc3934';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\/kfrckphbfwimy\/?__cf_chl_rt_tk=CxYivTk7xwgWlVOXucbYJyVSIoEryYWfzh.jImCaTe4-1754792729-1.0.1.1-3AWcvY_TgImXn7RTHsXgdA4p51b2p4AgvFqex6zav_A"+ 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