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: '96d4636acca35a4c',cH: '77Vc31rp5vNHV9_Kksrbf1197JIlQKhzFJ0b8_Tbc.Q-1754880237-1.2.1.1-fgAhpOcSugIbGitZ4NFbGv_RtESBzcGNDCdD03ZrsP82.nnEVPetcs0P2uskDoNG',cUPMDTk:"\/u\/rumrrknurcsy\/?__cf_chl_tk=kmmUaw5Crc8wu9N2G..7I2stvupxNRCmX5s6Q_JoEJI-1754880237-1.0.1.1-pqBpIHO8XCfnGZpZIrJfh1lLhH9K5IGXt96YwHVq8hI",cFPWv: 'b',cITimeS: '1754880237',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/rumrrknurcsy\/?__cf_chl_f_tk=kmmUaw5Crc8wu9N2G..7I2stvupxNRCmX5s6Q_JoEJI-1754880237-1.0.1.1-pqBpIHO8XCfnGZpZIrJfh1lLhH9K5IGXt96YwHVq8hI",md: 'K0lI243KfT7Ryu6oNHC6KGeCt1rMycNxD6cyLGGLvGA-1754880237-1.2.1.1-ruX56zZxLH4re81bJWUfaOfex_oGr6vvbWdD3d.KEViatPFCY7sBUSTA1kD9iEZD5.7ZBNqsPw.8KURRMXO6nsEO3WMzznsX9o.o66zh78HHt__UJk3WOQoDuHIP8WaS3YZlcau74LDvk.p4WM30.GZfP2bkDgAXTMVYUbS6a1XMMqSnP0vh7I.y8Yo6AG5FTQppcMesjb2DFhZgtXuZsXpGT9mwF.l8R_G6ozgpFir0hU.mqu.cOeURnEy1Lix7ibB5c2x3KQmz.EBtmEnMEoQiy7hjHXFLExNcpumXhdew5UhRebMwNwqshw3qwscgi1uwR6XvleQ550jURSwEuu_lT1A4DVMwQGolRgWdimJ9gGxC6lHqaX_.2E0.RFrWv7M_r5TXj2hfcvF6C7RpVNrlwevvhRYCYmDg3Eg0rPHdUFfXelvsDKsVnJwJZ0oUiiPvUmEEpxD7AOcomuDKL0YqvhnHnxXIi5akxBLTlC3OBEOlBxtYGUoZgfvdSpiGgqrRonillJk9KXAHvkq0bpE.MY1i6JwvN0DTfpTP2QMLgPTX8d1XGw6w5ORsP6wQM3pyqDFKnlkR_3nYkZMdbqy7yct.v3hnk70zUfbkJYOQ4pMW6zAksi0ACRGGTQKqb0BhjLPSyJ.vEbCYWrfWMtzzHvKK1AjM8M5.Say.lbYcvLAyfjmoXKloPJ3P9g6SnuHCVDjrAoB0nHdwWiDFM4NfPW0eLAH7P8Z_.W7t6Q_PJkaICGg_5mFDpC7y4SdEyXIZc4BTgjIBT5Ukg3QPDpdK6JP9Dut0f6mpIA8nV5pKQXQQrY6Z5BaYBISh1c3lPJ6GhxMNO89gD1PMZYSN6vVYoF2RohtW8E1YSNWXCnXshAcYSXGOfYyQCJ7iXmhu3MSY6r8BcbEExWqvv9h5L6MknLegIliLzhiB7lmFvzc',mdrd: 'z1hgWTs9ZO8Pq3bSgzAvTnL7O3c4pZetbi7jwfWaihQ-1754880237-1.2.1.1-sozz2fpAppCtlhEIoWRN8D.w1c3ExwU58dOjYIkmz94IytMW25LEehZnH4kP2haktX3NQFITKSfVNH7AYhuAg2yZs8R0MA_aX8bQJefczyZ8sukoj6vIkoEanTq643.e5nX0vUnbiW8UNypnV8e3Kd9sfG_CJwfIUeX9YBqORXvP0CNs0aCYC6xsmoXYGGHiLPkJwFQydlmZy.pjkmY4jqlCyCWEdQahO31V638G3mgeJv66h64KIBxrRhBNH1ow58H.MNE38hRKQhExRc2u1JHHcbDEjObd227VkyZd20riIyUL.K6d__IVjH61D4y8tEeVFH_8lY4lgMkqluzApl78HAcauj41GKDtMe_uutIiqpUOClho6.DziSEkYuvGcscmTgQUwqPDc88uRWA7xOWFT1oWV_ZUh5a6STbimzAehHs9l_oKnwjm3uSKyrNvsktw4pkrKpj7Cq7YRSHuRz926MiNDobZ94j0QpWGxbrwtp7ZhZhQn5XFTqp85eS68QxViM.JOaOhUQHOGuMdpMXMfdFHX__cnJqrBa3CM.xKvdmP6TgRzaT81kBJ.SUJTrZiFpPDvfiOvjxWe2QTiaDqIsgwvECUTLkSvj4RGc3Y56fNu5cBp2FS5cOqzT46vC7qTAXzsjqtKKtXcxFx7NQZZPhAbjDlEMgw_9S_L2ETg4mCZf.zHgADgiNmm7FE7uYqSNXIOXI8qF0E2809PnIdWQ2bUyjGHkTvrIYjFvnNQH2MySBy.CNam2rITZTSPMuDC.4Nqb1.IDYiuXbtErvLz1GyiIfYqiZQzuLMukPM472iMHoFMKvm6SZGG6f5x8D_rCZRZjeA45vFNqkuCcCFWwLJPaqtSaf_I4mQXIknriaF3oVk9KvuPuM8oSAmkG.VZ.ISTWU5zttqlZYgwsbrVGAvxfhcawcDjYaMdHVC6L.OmP_IowTHaQydNNinYR9MYsfh5grshD3YahOQQIjcWPFiNLu8Sh6dTzi2iIYQOf_R7R1cd0yy5K4x5XsYxwLdy6nXLg7mqEepMZA.DlRsKvPEUnIzBCQz2Awz_hwTwESu8o2wX7IvZLI5pqBEhjuu7TkfLBb74sAz5LFSzRuYDxvPo0L_msqOioXT7eeYf90nVvQrWqUlMyQDeCFjdyXuqXhZYH9anyvS.OvByV5cwR_MhlikP6N4KrD_76XqKypRXLX8N5dZ1O86nLRToYUzhNwogWj494EG0ShQ9CuAIogF752v7RxMHyJV9zU7VYvGo9L52S_C9sZ16kJrhXx9W2U5Rwlv10.EU70Po88RMx8ofCfzavmgIbWVE5BkDyu87qWOShQtbuFELmVD84cP4giWQHLZW0dLKvbb.CnlWel9PL96ChqBwIX6lWyBSnAJZ4Y4Cf1euDoYhoMBQNal94WiP7nDS.XYQIfdMn_lusU475ehJDZvzo9Hw_jGKtY7xpd5.c4CBzRnv3fZwMyYMIhsGufARCHUvLvVf7vZ0.hCXeJuZ29ky.Ydm_YuiJqMZkZC.d5skF60KbS59Z3542ZHG8mgcHjx3ofim7RsPVq5SLAR86SN4Lyg5dAV7N3kH1jAQtGndPh0G5CFlHUV._ZO7Bkx.2UWRpx0AbKMf_MsvQhDbyb0m69wvx6sM7AjxAcBxldNlw6nh3E140R85UJrqzkCHNuYBU9w2gjiUsJ3AfHWu.WZf107wjYW9jPmR9Ch_.OAw9ApWZdpkVNhEJ3nvvNqMZirYNmMnZktG7ymfQ8.R5D.Bu2X11ubJ82XqFoj21alY5UIHLtG64xQY7yFUZTWFf8ygj2suoIr.ouwmfxqG.bqa.znbaI6tTrJPbds56yoRRheRojLjPktRtROaXwFBP7vnmBJ0g',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96d4636acca35a4c';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\/rumrrknurcsy\/?__cf_chl_rt_tk=kmmUaw5Crc8wu9N2G..7I2stvupxNRCmX5s6Q_JoEJI-1754880237-1.0.1.1-pqBpIHO8XCfnGZpZIrJfh1lLhH9K5IGXt96YwHVq8hI"+ 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