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: '96bb91beef9ed6f7',cH: 'S6sxRn9FqZj0K8x.W0iI94tMYRA4KFOJ3psb1flyPws-1754619990-1.2.1.1-u0D9vZSLSlMqXGbVumUdOhA8WSY9x0E7kTPmnNe5mDJvbNPnxbjFVZhD9sMjFB8Q',cUPMDTk:"\/u\/xjhcatxxzd\/?__cf_chl_tk=mysuT2VcjxApcr7LDfQVv7PxGlkp2NbJwLg5wJhJnlE-1754619990-1.0.1.1-dgWuIypD74iDEmfn.eGogqWgQezmVLfXD_0b_cMn2Ds",cFPWv: 'b',cITimeS: '1754619990',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/xjhcatxxzd\/?__cf_chl_f_tk=mysuT2VcjxApcr7LDfQVv7PxGlkp2NbJwLg5wJhJnlE-1754619990-1.0.1.1-dgWuIypD74iDEmfn.eGogqWgQezmVLfXD_0b_cMn2Ds",md: 'Eezo2hveVs3fLbCAAk4_EMniIJw1ZuPo5iG4cP_c0c0-1754619990-1.2.1.1-lHruES9HH.TLiiIQ0pnKP0gmolHU2jKogyNeB2ZLvmDFRYk1xP169dFqY0rC8k9DpltFY_lWFP8VFpMgR_1xKYZSxAJh5un5flXFyeLlOXeFRQyIvTzRDyFqdU1AMnbcQoBCLSyUk41YSc5jx0OcGds1Nb6unB4JX4QSwU0AAqnV7Z1a04gxjpKO5oseLrZpO4mB3iPImtfRQfQ9mA3cpqG.5FUvrt0y1KehpCuwxKhvuejgVaNRHVDjkghOjVo3dfR89MQnXGGOBfvVaEpHrq2f3tbZ7hYO8uFgVmfDR2gpRKKsGSNBDL6qgr9TBrBQtM0_uaoqtNnV6NixKPZNre9d.Gn43fMKqx1dTNABeJmpbo9C81wSDAyCy4sFOTp5yoc9GBsPhevOgjNFf_90jwnCv__nsBsxKMuV6qxibbxC26SJZahuJWqjsTsMsmaYKED.5gLMorBYwf2U0ogDSGBKxFX2YYbwmTxWvsMLf0d6SylPpZlm.3446i5uC4aqjwWHSxXBikkS1DAfKxs566MSaFTCoMdKL0Gtkl0XG2dwwZwfJZuKy3IZ.o29vr_ygyE9KccQi7174NuO_V.9fsYJmSGm38kUXn7SUA2mhb9rPjYaUkZkz2llOd3KBMOTWkSqgmARLZsHn3eMuSLyAKldhDbX6M1PRdUsc0oxNom4VEOolB7tX0pGpOS7aZUA.btYhSslQrn8kv0NT27Umvh6HbttPE4bSHI04lfZm8QdjjZZy3TJkpmbsRsLHDGNyQqOkXBrUmmvdQeZWKdBZspoouUZtT00P2eMFW5MlKwnndUn0VIT0AVo2Zg7f8nluLaoS6haObFDaGXw0ioRaBc4fKboDfPc8MU1onyeityOymfh..eIGZIXwMrwGitWAd5VR5bNMxvttrWeR9birm79T0UkcjVxdKBfY84l6Dk',mdrd: 'D_7HTFr4lsS4VYMgeIyY01wAOEkBqTfbswCiZiJCeOE-1754619990-1.2.1.1-W3i01gOMnEpSSpnvWoQbK1aV5_ZY3tzgDu91gq5keUZLelWOdvDZo1v5XB2WrBEZ3PJsyHC7stXwKL3O0Hc0UCG9H.LG.q2sipuCNAuWR2Hbxc6Zy_SX_29AaH2JgDMZ2kaFhK.BXADrVZ1oiZ9k7V4GYxjMN9TSyEKL8FkIs3GprrnYDo_AWoTwDqS3t0q_nZik0n8Bn1k0SJ9zHOkl7dY3wozobyHhpshAPIXGaCBTTs04tkg4ksUsgtlREsW.sbzd6G0TlbS8TOFFeXyg7u5gEMbgUS657.bsHv7O74lSkj9KJQH0S5ScxP9vPyHjNN6gLDrJ1s_hBY1x9SYAuIiOhJQkLJapyWUoGBhJw8ugBGJJ3s3g.7OFvGr2n9_ShQ3yAgTxYmfZHa07qX.axaih7k49ILOEPCYwmqnRtov_mWEGZ8VbQL1KW34.EyKi_AZ2Qx9HWKclNSnNp4InKQLABPL6O1RQXZVnlglhLFWLe3kECz4mrbbaI5y3HTfYqnUrb0KuoXOGBQXhgzROKcaUhO_hLZNMPDpw.bOVcO4pxU7cXAEtgf2BgsR67_Orc_F7P53u6I37NTKMLQcJlZj8dUVgT9NytFAHlJuyoglASE.RibS1ltsJWChqpAwalU0yQm7bgJtx9pfvGksfZVHmY9HmWZzDTLBxuW63iWWHOr7VUY33NSMpYgjP2GmLRkgzDW3LWPEiMIXXxKhDuAgh_SfFakInjI5595TYcXbwmHv7RnXpeYeFJAcB6IIMeJfQZTlY0MpwcG_DyMmqrMf_0sGpA8iHFFR32tetX2N9rFQvtf8OriRg2MMBvMGM8exSyhKIU8_S76IwXlfztnWzQ5JTOPpzsivQmnTzUuZObNS86fgCaTKiiWRQwPcQKQ1GsZqqendSRyP3PZwQSjzmz7qPQeVBUxL0IM0.8Y4KO8cI7KFiAFVGDCIu79sIl_l7DA6zNYO__4UC5ghLIKpW6mx4Bcd2QWkVNQnPGmhCI9sQ1j9sQgj84v9ys82zHNg_4r5aZfLKUa1T91CFothBGkMwXf_WyQDM8Oge723MB.af9O7FAf3ZSd4Yr1YvPII7s0aeYSs.18QOKaXNOG_KQoMv7GDGrBIOX5ofyRoQH0gXjjHgLxVj3zzdpNxvXWhvjEacWg4DlMy4iAnIooh2o2KyQceLaC_gTDxXZfIUqbnkqdfpry_dN8V0jVFJ5nHvlBxlMtUHv69x2gEJYYVClwkNyOjX_0rN1IoVCs0jQ0eI92hyilv.sTNCXYHZb1xs5O6_8Tb8TAl.iEHtW7kzrpVH5QtdgI3NkjNyZ7AfKOcaX4fHRN0MKhbNRzg7icO_jbdpuheaRwRLW5BKj6jmZbhCAfb4_IwCTFddKxjXAZS8Gr6w2wWedVtI3CjGdzN5b.mOLJ6yzJjemN0lWVd7IigVGfsm_iyETS_TGgUyWy7wlBL7Ofs9KXKGuWTV74sBtbB.AK6pjUz7S1TWgQIKgvpxTFiZxqe9PTUTbsR7GJzriz5.GowNcSpsau1QNPIhjWZr.JxQAp5CNOTkUc00doiQRkJ.XaDAXS4zxHqJdGNNeYT63QI8IlZkeZRJJf12Oi53l6yeX9hl2eymwyzTngkY9gDicyOOKpvPcyO.sEeuFn45P6EBH0_niqpAzWlIixnydAJobeY8echQlYHHFu7OaxL3W04DW5aZuOJ6Yp.KE19VDv5jyOdnVPZcTgdKhrNeuUz3I4hvdBqRXJ2YccM72ZIEXp2DvWB4GK82W3cQet_rvb9kvu0hFG_NRQhcerVtn2vk00uH2H4ALSVWzRDDpN7_Plp6siczjxLk1PCi5hwrF5fP8P8FpIuko1yAxXV4QiRkhVqEKE1Pmw',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96bb91beef9ed6f7';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\/xjhcatxxzd\/?__cf_chl_rt_tk=mysuT2VcjxApcr7LDfQVv7PxGlkp2NbJwLg5wJhJnlE-1754619990-1.0.1.1-dgWuIypD74iDEmfn.eGogqWgQezmVLfXD_0b_cMn2Ds"+ 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