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: '96ab3fa01c5907cc',cH: 'IJvObYnV3KlxToon1YKptEbtre0hZpTrxm9uMPK7jKg-1754448855-1.2.1.1-BiLtzsUAg7IqtrewY1MRiuxJOekIImFiEqyn399E5YIEO2bTuWQYm0F5aXG.spQ9',cUPMDTk:"\/u\/xbwuqutyrh\/?__cf_chl_tk=lSq2zCobdirFOMNrEeaMetsb3qxLk5eiAz4I7UwGAxI-1754448855-1.0.1.1-f3WHPVr6vRFp6AH8pjWLmAsGh2eFnnFFYhgX1zoCcjY",cFPWv: 'b',cITimeS: '1754448855',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/xbwuqutyrh\/?__cf_chl_f_tk=lSq2zCobdirFOMNrEeaMetsb3qxLk5eiAz4I7UwGAxI-1754448855-1.0.1.1-f3WHPVr6vRFp6AH8pjWLmAsGh2eFnnFFYhgX1zoCcjY",md: 'MmeA_t3slJf4f9gQ9tGA20afLL.ybSysOjK4wYWVnZU-1754448855-1.2.1.1-c4bY4o_R5TFtrqXmlSdqo_g0pofyetdCaWVqz5fRekO1FUYuD6sz7ylItQ21QNpc.T9oQNovCTRHmIgFKea8QDH3xdRz36gZ97xYdV7aovCnnQolFjKrG_oeDikXhC3IfoTYVyPsQ6UgabqJMEVnsN6tNrMT.nOtPD.9c6Q1dorS.xKr.aT0ISAbENhI2FcKk8I2608jT9GbsL8OiOfejd.PS8yAlR6V7ZqvCawl1a4p.wcNseq6noMTLozJzwZ6Yc36J8Fbu1d.kfpQzpOqK90_i8kOfFAgM_B4D3oHpvKUa62w0UEjg9WKim6.7ijWEL8HVlCpuZVZ8xYbwfeY_1OfdPOWkItO4MhaWeTfkkuycEFuRm5TwC8rFLERTVsZbqqZVapPlHbBAjfbekRD2X.1.tJNh4wr.mN.6480inv.ZMd5NdxHOy3fx.JDJS2F2Th13yj79NmhxgxdVA0VOyiZyBKhA.BD3jgzdHVA1vcFH1QicrvCG3GfCxXz7tfxEEayJthItqBN5M0GHdOJIkvQ5MUY2azq7FOKKl5X.tjg6b7dQglU1ToVXxwhtmCPya0kfqZWr7GfjrQcpN0.H6CsTbU7WNYnQsHXpzpVPQRycMJ7JHvrwmnHx__fIJkXE._UEehngEnCqaCUWrfyVVmgQxaG8Nnbz5zZBEc75V2JHROUHBX9AtFyVmcELAct0YAxRki32fHOTDcU68az5yLWOFiHXWqlYXxtnrnKxpKKGy0QrxClRmlTCQnRZ_ju1YyfGVAmWFF93Ru7JuVB6JG_p.V.I0c54tPDG0osy18VkR32ZxEv37LKF1ibchZ7ydW.Fhq6UxL3EumOAVEfy3gV0wYt_IpkihlFfxkim6l9RmZp6TP2sleLCOksAGxeumE6G5gRFSq6Zs3IWe2KxQX8p6uBdca66GcyoudgGvo',mdrd: 'KWJZyKWoCGuPH1NvLEs8q7ZIZR2oBn2O5.1yopuOkEo-1754448855-1.2.1.1-fy2sbxRCg6CCnVwUxplR7wtIiqy8Apb9IG7hVGyrf8.O7OJe9NSgHQ7F.jSI_wYfmi3IyNLz2IqRYc55aAwYRR1LD8_dgbm.qOgQmaYz9UXUx_.KnJ7R_9q3n2B64a7tL62F5fXhmmaReqiZwvnpEHBOz9VXs0BRqAD7IkP6LGRlzwlkmCr9v2mNTuzfwhZWYQw6J7uWwyruXb2w9tnSaMuiU_LapTAxLW.Vlr1dS6kCtTOCwOCMosesUfbSPpp.1_ao.FXOQOonIlFAVvqOoge_PTqRM6LeZaVmEAn4dMXpc6iytsmzFdFUFaNtXuCUjkIMOyNV0MOk_qF7hj1deJ2tFLP4NBtmQ0m7VPrtCpgEaFWltmBKUsYCXkwztezJo4ptK2s55l5OBW9YJPRGdwMI7TJmLJf9_PTM.f90NRaiVWRYVvk5IWlbUIQa52DfMAxXuNivFu68YWo2XD48WtF_GXplyEgTUnCeXguIU8Q2S8_0eohe0N7UIgUGJYEdDuP73tApns59kvzhmunEihJX94ObjqZKMvQ0V4AXi6NxkwyYGan9qtAX.J16nKjLMp8ufUV_GlWs6dtoz_D8cZLsDYPHS3eFqLxYCWbh8HSvkc47gPo8hX9QChDC_mq0jm0KtoJb2m39xINamZwCbcc_i6LEjIpUFXr9KASaIeP1IqBqxKoLSaBdX0W_OLD_S3v1gfghLsmnSmYEwmgrXg2ioCJVqicifwJ6LW21fruoPFESHqm_7WK7QHJQiZSpT1E2lfryljuXwUP4mfYCH3USxtm0DM8Du98sD6Q7MBVkvoDL9WJDiWXUuJJXjT46hw.hPPZPVgJCSaEAMxhCmA2rsS221oWuqG5h0yRfZmg4gS_MYklNObcn5gsSXexLEwQfdnPs1xsX5ZSgnUMNAfmO64sEnREX1ciOKCQ6fgI3RJbjnInOwFcfUy1PhAQpjIlUpTG28Ekdx1_Urr_u7dL57DKkRCSB27F1gkI69Fo_XMhH7Dx_ftvWRECDxMPFMRPW.wv9RjWLCj9G5Ok_iNH1JlCVu9BwAyYXHXMVMKwwVsOOb6RI7.fd_mfJebxNHGOLmcJhtYtpMTqa6MIBMSRTHTXD0sUW24KXAIe8X5KgqGV6wW8RI4jfwwlU5riDddmELUk4P23cY2KnUHrjEkOoO9fZp3CTpLpLs583Oc0rQKa1xPL3w_DGpLb6JBZkVsq4cvb9.zoixe6uqmEuf6a5uQ2tFFNMsbQRaSOTNrgR.ia1CYhQsyaSbAmbVvJiIX8WRv3Asnwwt7zZQVRWm7_45SAIrn4GfVBafi86ojNEEoXHMh.nSsM5oBftRx0OfWsQthq9u38m.9nHt_qIQHK2ZTSVDykEUKiQH9EA4dNKInwAp5_7a.Jv_XrT_uIa4wcdeLvXJ.F.lUY6SY2FNb0nOaauPBfV2468sZ2wAl_cPA2SDkV3UpK9gv4y4eTt1ZP96nnWfUAoT4Jt6KFzz2T058KsRjWqGK4uH5SgB.LKOJdfjBMkUmOusl8o9D8HitwWvCBLN0TqpttO5Nrfd2GpFVsuKJ_PDBzvfllgYbaL.CHexQOOCszQruEPCzDWLhnDGNuKRiIfj_A_6hhYeu0dkXX2KFOK1P3j5_Kl8BG2GEwvYvfmdn_bVnnKVKpT80Vk5l__HA_fAhVPHXnNfKvB6B.0KuTxa8HZjRbtpKSAgFOXvlLJLjER70i.31tUNlziTJNqjYEAbvdUvkZCJ4eZOxolK7ajvawx89yYW_p3t9P27jLArp0geWUOsk7LIUyWWvZnHkGVcpBbtPjbxpFL7qUyLdH5iICLCCi2YQOXWBE18qyW.MjYLeTv_hjtteGOw8cIJUPuQzhvZVhfzOeCKkHYNecw9qbgcfK5pug',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96ab3fa01c5907cc';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\/xbwuqutyrh\/?__cf_chl_rt_tk=lSq2zCobdirFOMNrEeaMetsb3qxLk5eiAz4I7UwGAxI-1754448855-1.0.1.1-f3WHPVr6vRFp6AH8pjWLmAsGh2eFnnFFYhgX1zoCcjY"+ 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
