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: '93fee4900bb2d6bf',cH: 'ndUquo7y13QAiZGOGk9gAJkn0H.NpYw2hgO7hdJIK64-1747272865-1.2.1.1-7zIvKlfHvgf714Apc7IduYGQxEuaqhY3dtFgv3ZVx.x1AqzLTSfcsFAzQSFgUPwz',cUPMDTk: "\/u\/jcxzsnqdmubv\/?__cf_chl_tk=EJGtGqmICkbU38fPO5TXhTQtv70Ne9UYCqWdt_sskJg-1747272865-1.0.1.1-BURSBa3lOv98KpmL.ek3KOKlGJm5aE1GKuZsWhR7cp0",cFPWv: 'g',cITimeS: '1747272865',cTplC: 0,cTplV: 5,cTplB: 'cf',fa: "\/u\/jcxzsnqdmubv\/?__cf_chl_f_tk=EJGtGqmICkbU38fPO5TXhTQtv70Ne9UYCqWdt_sskJg-1747272865-1.0.1.1-BURSBa3lOv98KpmL.ek3KOKlGJm5aE1GKuZsWhR7cp0",md: "O81AdkrtWxtaSU4HfdfBv0G3p2rPu1cZ83iuyYcAAT8-1747272865-1.2.1.1-3Vmksg2fWSvHvOdAqUo3M0wHqp58IIlI7l6wNxC07plYTWbjr89eDsoCEjos0dcMrCMp_KDyq1AuFZCHXmmt0_..MfrK_xtMkhHL8skmDkRJJ5ByulusquIG6ra8ZteyJRplBVk4qbCXQq.yBJ40G6wyiGzOjqUHuSMgiB1NWHnQ8bqtq3EOeTK78c689ewX0WDLL4GKeY3AsAaX2FsJPfywjD99XQSfxWUtj7WdOqG0QOZY8dodUiaZw.3PO6NUMKP8vuH_5u7lzJmRufHEguefcjY3m2ZZ2CfFbtGK1RhhxapIIFt.EC0MFcvE2LAvhz3J0us_uf7SauF4AyMLFMuTmh4UBek.bUi6UIOfRLTCLHfohuPfbK6eWQs_dtVaD6bPvfMM.10A6JhkZ2icaYSgFOGZdPS6Kuo1VEtpr1YpxabvrKVMrIujRylof8rqDk0GOVX45CfpxHj_dDMcXqjjTr6yAZL54Vor6qVjxoGb5EG3nG3oFp9OA8Z7_FTAk_dtJ.W6EJyCftY_4CBaUnS9CaARj6_eIhjdb.mShvt7XLfUcrMp5Qg2nv5fXLJrKX0l0hJ4RG0xEwGmjItnTkzRzbdo6HDJeeb4NjMtYQBjHG1P0s3_7iNBTWgClJuyrPVuQkIAzfBycuxo7ULQoBEaBjTmcA1Crz1PSwV8Pib4TN1xq2MtZNjKfP5geYChwmt54b6CQK8KOkzRI0Rqp9Xv_RoWgo_8xgp8plaG9K6s376CZYLLCNT96xXf5TkX7JDIKs29L5L5hmo4OlyTqS.KOEi6MQhkSJmBn01Htol6dnK5AK6pWDzY6djfQrVJLyzLX6DZqW7rJYrcLs7jv0NQJVhS_hswBte2roQCj_GdVyHaEuPLeWLRdhIINBWlk0cItqeLuo4tbYC4AprmXlCJ2sBKePb4BoY464yhswQ",mdrd: "yvyTBkTvzuts9mTc6MvDgJTB054pP2sO4dhoeaGEZG8-1747272865-1.2.1.1-fxcnSX6mhGZ1sJ3xiwmc0TwiS57aqxe7WkJBgZFVgCmNL9bQAytpEj3EXufYVVVasDKKdb39BKamDfhLpvC4wxkWN.zD5ujvtfYhqtp7ym.uV0Qx3FB71KpcUPURLGa7.BZwKLTnA4wrvUY72iEuSDiQ2QYih3zpyqQO6ygE76SK3ndvCQCHG4GTbKGu48hMhIKavK7x3h_drUaASL7Lp0d2j.h9MFCNwA8v8pvr4Wj8.jtMYZXymIjyywwRziqVfMviEuC4CoOcO2BbeGyvWn6u4J64Vt6JcCUKmoW4d5KoSZXplHJmP5fsyn08BmXJ.gPILY274Zv6aRkvJmcbWGiz566j916xiqUWvFxe4SUvh4Ur7Rs4ZdtXIY3LTrieUWjDYKqvphkW0crcpdp9D17Wg03WUdGhOhLCR1XBvco_TcedTDSUnxqSvmyabbJT4zF1nwKtNibGfJyjTorCd.XNkg6oxI2BhFzLNibcYLBZeoW686BB0RMi2802_qGUlRKfl0VUFWCOehK19qQEa1kwOwKwreO_tc1ARWndqjAZQnLfZ9bGRANfKIsfOeU9i7Ei_Hxv7GgmhVtcscHdJUkOAj0_gmXcT8FM41.GO1EJKucZhGAcpZyY7iBDweyppZvMXGbejEnvTSaCc2uEQI7TqIj1Y5HZxr.gJVbBjPQgLcaRNqguXC1a_YUo_798NYUxPsnuktVYiIoWD_HKmdm._wMCKfRHK3wiT2jXGr0sopDUJ7toP9g1jIOJ0j.yXa.xF7Rbje5nfWGAslKTFgsokgpzjCTq9M5yoTNWGWYsIppGJYBM7POaFXSxB7FH08dH8zvcdsdIH1_Ug4aflbbFgxT6cuQIcEfKqNdge52mkF5Q.uEDi8WXUVm2.sx_Bb5Cm1uMBxNHpGCZpohTZMamhufhZIBBr.5N9nbGbP7Xf9m76mFD3AlGSjgtkD9O95UL95v2QX.HJc_ZcWMcXsEw8wIYuN6fMtvtK_Ao8U.PGnHsdlYKemgC4Iygm8LL_vI2efRrMgMPsIKC133deKIM4dIoXZ3sJp._SeYXIKKzWSGevr5XXaSiCsI_vYexIDDKIj3S2hK0zSsDYa8m74HZQO1ameSd9iJUvbtvfywwU_mKqe9kBw1DdId2YbItzju1zJdD6vsuCdmRZu6ZZwOHdfZKoL5qgEFPMLvHgFPmxnVsKym_ixpoDyTtvMmj_ATsnFRwn6LQZ65YPqtEZ5PgpD4UkzQ9zh3QtZoObZufzLRtzzkE8m4o1HrSK1xdpty.wHQZND7UtAVWpdEqpiSiwUJuRQs929htcGkjvnihTnbCJE__2ukAiCR3YgY6xDH5t_y0XxaZI12_AFysMQ29K41HpYj2OIEYSsANQ69ylPSsjk3ueiJYYPRBLRgV.L_HQMLwaAKsEZkt2xdR6QnYcLXPu.X92sP9PzUMeWAUnxHc00PSwxXonWICnY7eakSk04GqvDlsIN3r9rx8XYCOXGUlgMkotoK3DhU78Q5o2a85BvewCH80_axEP9dXVRDrazFYSBYf5uLr0J3flPA04Uq9RqDXwJv3BPJqUTVO3aRkVPan1e0VBud.bpbBe4TQLAy76C975qfpWnZfcriUp1UfliV1IGUcjHaHn339UtXj4u9TU__PIGHCN5KRKBPsXTOKQomDcOEtLgmKkES5iQ6mJoCQ.zf30MGWTgMrCGIhntSsWxiXqlaDWCW7_66QO59ZO9V_2V0RF2O_rahDgXKzQXTnmMu1gHvOtjxJiUfkGrVxu7Rb4J9e1jvykkkaIwVuIrMvSz5FZkvUvCNGSUHSrMBv8I4dlYcs.9uNR62FWjI23I.vts2Wl9kT"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=93fee4900bb2d6bf';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\/jcxzsnqdmubv\/?__cf_chl_rt_tk=EJGtGqmICkbU38fPO5TXhTQtv70Ne9UYCqWdt_sskJg-1747272865-1.0.1.1-BURSBa3lOv98KpmL.ek3KOKlGJm5aE1GKuZsWhR7cp0" + 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