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: '96b0f32faf2f916d',cH: 'KKM8J5Zuzea9mIJpIMkelZAz9qFVJinvfRBsiUfJvrk-1754508638-1.2.1.1-4CFrIyeHJFQ7a0VVKxHF98RpMK5Xj6fb6bhcYpEj2U6x5fqoTLu.oUqaUTe3soWP',cUPMDTk:"\/u\/rywpjtgcfan\/?__cf_chl_tk=kC9Z67DL4IOzdCKAj3irukVTuiPQAdXHVDt3o79Borc-1754508638-1.0.1.1-1.dBtMhWQ4Bxsq4vBCkxSSiuvZG6FOQQVxr2Ac.BW6A",cFPWv: 'b',cITimeS: '1754508638',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/rywpjtgcfan\/?__cf_chl_f_tk=kC9Z67DL4IOzdCKAj3irukVTuiPQAdXHVDt3o79Borc-1754508638-1.0.1.1-1.dBtMhWQ4Bxsq4vBCkxSSiuvZG6FOQQVxr2Ac.BW6A",md: 'qvgHP5GqgRKaceuPrbP4t5egKzF.ha2aO2Rv.Ed_SP0-1754508638-1.2.1.1-n_DSCwAUELAOqrKWrIVyhtP1l1mf1SkzAgYFALKOoFFT4N9IatP2pZTxIZ.PQ_0W6Z9N.ONLRmEcl6ZlEiphmPW.PMm1XqNsurjH1cXoaZL51kwfSmrRd4Qw2TyBzshbyLz7spBgKyCqJICwUQtZjZxLAUgGwn1z.IOKsLPlVCrs0UiJAputGUGnVMJH8hrmZ51B3GM.5QDpdr3IMTvw_3PB7IsE4y_X0_djWcOp1HoJHiKqUcyHliBDaayrehR_sGWuio7cJ1Aaxhufe2HjhYc4rxfykvg6i3ATOR5VAgxwf9bIIZH2tAnqJyiNuZyf7FE8y3amlkBmZ.GfGBzqUiicMlzTjZwjiutTrJJISN4_iCZUpU3zjMf5KJZ3zbjwgnFy5ytVUGLPcY09lsAfBKM1LHDEKZdnVfUjLwnGbhv3MuHrXhrex1vU.7iKjGCJhejf008WUgQT7L6KWu2j1WvFHuaNNrLgAw91cR5oJTORxpfUF8GLVrw05J3znm7bDdTVcCP55k_JHaXlKZpCAwBxL9v.MR9etpVowTe0eGVpBvBRTItKrZGUeKFLXKXfbRX2I56eo8Mo0JHwKSMRtAIsq4hDsrhYPLymsDzREKwD12Zdkc.1CcZyag63XEBmziK6qymwRUhqZeVifxV9Wg5yxTdfoP.WX2fI1hxYk5Y8jDzJSYcDgzPrg907WZRjSUJEpoesF72QIbBBDExDsQdxQAWXZiNeAcWdWn5Q.2vEx8dKrvepx9c7saTjvu_hBHAgvmgx5rnzJ9IE9vEIdGCc1kuB7KiyjWKb4_RwUBStPjbv5sTf7AP3cz_aW9oSybLYGNgPzwnS.ho3grdzyTRtCTGJtoyZaDBzj9UdoBeoSnbX93GpjWZ3H8tNrNjydieEJcyRuH.1BscjzM.BFCf6TdV7SBRE6ktjbXnxyfk',mdrd: 'MpSUty_cW5jzFzoeuZaBya.oPS4CEUN8UWGiblRNIyc-1754508638-1.2.1.1-fu3_G4b1s8BA0cdzGVLLz5GLXW4Kz3KmxihME.9gLoXIxhDtthsmZBsZaT6VWZ4643BZg_Kzeax.S1u7HsULd.MALC3QP0k6zHPBhHnmQ2PXdtURhCr6nxFUYyF2boazHHRcmuKmS38khJ0EYPkliH7.KyztNhDj3JklRmWTwez42iZmWhKareKBsqtv0AhHrR5PearyLgh5BucUL65O0GXIsoaIyckaxwYwbON61GCPRHyDq.bavGIDyVyxmL.iXceQffcWqRW6EiCOgw5rrX63aZXeDoFlFQPOFI5VkHifNVeWy10Ywmd5kZLqRjlA3DdqoQ0GftbGBZ8.qqQ8hVS59R4LYJaVXuFHfORLw8Ybp9jRxyhpRN5WW.b.e1YmBWBGnlqjb_lkNtZAS3WUlJyBwP90z3VYyhLOEThB2v.eB5pYYqT2Gvg4iCjgdzNfp3Y7T5j7FB2_biafO8HqNqYAOcUPrf1doHdvh.GN6t504CCnPPpFU_0d.HjqUi7VImwpH5UszanYPn4mc3T5bCZfN_oSRuTKvCn4gzxbQ1uZtOoADVlxvlzO0iDWcfOK1H_VjUiGxKYcF7RRMHPNY1Yq6xdY4ulJ2SkhhK1LPxqLxVrCImNsFd5RlBmyIGyqvj_iDzMCmPDHi20xcFBGLe_qWHoniBBgTS6ibRs44KIxaQxwmb50B9JVxHQsDWO_KUSOowaYR9VJ5kpOa8RvHueqVdoSWJHSs5.ZaMIgYSxpFVEFlpYsFtwPnT1LOAQAt3PGk3rGbrFFKvy7xUIPZEl2dvYQ53xRDDlYxJzp799cDu.JQUGhK37b53L1j0HFEhlrBCSnEZvRL4fnHeKXfj55NtxklpjQhbJA1sh5OPi5SK_tcHW0tl4W3TXCqtoQmaW.CdFaqISR2l7O6NqTe6gDy1Z69titkPv7wlr9CUwmWKru23IPgCayiL0Ejn5yM5_p6qOpXAiTJ1dEjzdPH8KsnuOoPO_jvi8Du5WxdNrjn3fviBf_NqVSrSLIaFKvqVNfgAzB2c_AtyXI5Jc68F8D1w4wsbxanLIsfubXMIW1uCxFnAejOn9wyy9Kc1Mqp5T3.druw9kJFbyL5xmK.UgBllAiAYk31ALFsiMBUZOetchdF4bqFiqqeraL5m_D1Tg1FJUVuJmUXSGBzN.N1yOKFGx9GF6QmJ.rahB2yEg5NXc7WVyK79gc2WLOAGUE_bBGARusqZ6AZhUR7v_G9SKpf5jnCsRqLyWMoEdw.GHmgghTrYeNlYyq0jDzs3yKH_R8PhGYWYZbRs3P9lvK9ryZPJQhiTQvnh_hBV08PpjnPWNLyCCY2ZDmzUKqZIzQWV6PJKLh0_Qjgz97geBanagYZDRvDIUrMAyGo_ocFy5x31WKMMrtETXR4ZDYSTYl7xMAORx0dzXq7o.W.5lbq4IjjE_9uxXIB6ctTt44IfCx8dmNQ5MqOErgzvuZidOhBic.Kb_qc3HCEDhMdpa3CQfmDYreHdatkSNCvqU6Vq50I5tzwfwvUvJZ0ksouerncERL.cTFvZpP57zSwU5KQGW95LGkO5dRTti5JOQsRkXD7_54rFUtmTjEne7y9RGH.cATEUYhR6Ua7qq1h64C0Gl.ai9Mv.8ohawOVCd0yF6kgqB3XVn4aXEqeoPRl5iaP1a75HvsVjcsSeK.SV2GR0r0FPINIbzlDfOS.IIzeFx13qDbtjLCzz1ZihmBV4Stfz56XHiG2fWsHIZPzlKjDQ_2hmBydMz0t8qCAeV_7y_Lba_Lg3AC4Mf7CYeTA6y2UwW7Q6MXWm3k6ya_tYMFed4mbQU15.d0ufl4g9aKfrNmaHOwEDhoqMpOuOsGpUR_uC7TVM7ADcBcY9Lq9nAURw',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96b0f32faf2f916d';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\/rywpjtgcfan\/?__cf_chl_rt_tk=kC9Z67DL4IOzdCKAj3irukVTuiPQAdXHVDt3o79Borc-1754508638-1.0.1.1-1.dBtMhWQ4Bxsq4vBCkxSSiuvZG6FOQQVxr2Ac.BW6A"+ 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
