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: '96cc0c127f577007',cH: '8J4Zsr4Ge8frTGikk1F7pYo8fFbSHPCrFx2q.EAw39I-1754792773-1.2.1.1-1gHHEFHD2A2vdx_DokxpNMTadi1HL_5NZGTWqaWMUmjSxTgnpTQHX7cm8ESTUtX8',cUPMDTk:"\/u\/lpiabbdtgcjm\/?__cf_chl_tk=SA5D_jINMN1qUAUZNlmhl3Dvau1LAp3_GUaxPwH6OA0-1754792773-1.0.1.1-.JDLuEXeNn8li21knxlhfySOuDhhzGOqu3SfgohhhN4",cFPWv: 'b',cITimeS: '1754792773',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/lpiabbdtgcjm\/?__cf_chl_f_tk=SA5D_jINMN1qUAUZNlmhl3Dvau1LAp3_GUaxPwH6OA0-1754792773-1.0.1.1-.JDLuEXeNn8li21knxlhfySOuDhhzGOqu3SfgohhhN4",md: 'l9_9Hg1HpER_8Cg1RVzLmCg7FgDSMnPH8._xsebUuFs-1754792773-1.2.1.1-wruNL1rGJ7f7zLthI_xQ1e31N.ZOckYWFqg8LWBYNkJeXy9E9FdgCEZSo3uUplnxqn1Kd3tArFc..4ngXbNjJeotsD6q8Xkv1h2o5LTczKIqXXBfl86FnGHfu.ixySLW1atToMrS35uI_zbRV09iq02jlVugXALTkEon5PI.J_PicCsljoLw45Tr8tpLn.wGhHOU3JSiUJ.hPPWKrUmOmyqUkAHH1_bKKabyZu0t622lCX4OHwMvurqcUApLPCGpTb6miNYQm1c9IF.pGMFnL0VUtq9zn9WJhO4_DyjmETZ5yy7kNbj3ITemPFRtU.FW3GMLZQINkn5dT0O_I7ppjRkaX14WV8IOQMkzqIvTLZ9WEHbhQuoPcY8BHg2Wz3vU1VXBBEfm47CCTAJzNiPhmbSoYXwPp5ISQ63qk0wExItKiSXfNrn2M6ZjLFVp69sM.uQ1JoHBxOAapzUtDJ0vnyiqdRdUHv5nZi2KWtizb9aGHks7xB1sLKtTsiUoemwyf4kbF7pUKSxzM0.zU17OpkM6w8it4Tu1fdiggRs2q1hMDhbSLjRdlNY56WKCgSZYpCx8hhvBMyeg2JUKGnZoMmn6pjlC0TSdJmv9Wl_K4ghPlb6h.pVTX0LkkbOfUvzh5D8YsEWjbOMMNRgXfA2gKbF8uJUNfBG4WPHk3zYJ6MxcOMfkYtIpqWiu001G9KH42hGltoMogKsuoH_JakF2vmdYBoYdzmR.GRgT13m5qd4VKnOLvLhtee2yH3LoDRVoYdGbbJsODIxw4M7XFpXW.djZHNq9.Px6DdtokOzihZH.VsmGiliOA6uTOuTREJxHL8WT2lxLglVNvfSKIC4YgatZkfBDc7Xf0JJwVjwwoCJTbDJ9jZMV5VpT7LmFiMnLt9ET4DtbGkbSqO9_v2kB.xaFTr5es1Pxxro_qdJ7OLk',mdrd: 'ErMC0Wv80odKRpuGDfRxKiG3rMdY4l1GHdL1ArFB9Tk-1754792773-1.2.1.1-t.5mtgHsurHJ.0CYu7sIsVqZDC7kW2bOXuayoYUkVTILzrrRYUzJFwlu3fyRhHI_s_RucVLNO16Khv9.Wlf0AyC3y5vMI_wigyVSg1Na1ykra1EI6.t.NWYAMCnA60VW47QsruVJAus0lvjdIBFJBsgQjaPAE4DCElVdGKSCyGUJgJ2Ow2uoRIHUufK92F_iQNrCMhSECUs0uKUkjU6mqvVQLoW6AytPP7_bOO0602sSC46rdvqdXEKpIJ6TSDlzRv2mrt2EoXb3GjHo_seJNg_XpcONam_iX3vY3.d1NMo_EYqzm.K5GpmucEblE9mXY_ThtfvE0mrBB9E84pxUbRbCFQ8t6buNpVOFblQOVOUD3yx1X59MS_WDIFQH8Rpr.g7_AUG6Vn_1K2AN9NpmT_Gh9P94TapD8UThzb9LoVtbl2QO63V3jo9LEY5pCiy57aM1qSr03f9vibsv9AgKupo6lSsF46iUKAd236yJ1R..y.nR.792H6v1py6g1IViVpkTbZTktqQubG79AHxcx8xzsAbIK7FVYr9fuPiZgKs12aE.D3BElxU6Jmzd5H.6odiGczTaPnT0S1gz.aQb_tKsmzN_I7mCKy9BbEN.OxJYUaY7VCT7dsIwMI374j6AliJBfdg5J6ARM6Mdon7cH6abtmb7Zg2S1AkkGj0pPkLHYycJdd9mmJTxhxb32oteg0GJkIwQwpKgTouKE4B9riVd3sm7.hCgYLakX9UVWdBCFDsrC_VzS1pdxyzdEkHehuzR0aubMqznck8wCcCTakpUqlx9x3C_jwBuHmyK9s5zfucC_Ey4oHXBV0Kyg4HjJdQRRjRH3.qje6H9RiqT0bPXrjQuPnYj62HcUzoxh8v.AzlOOKL.Wd8mghcAc75qP8N2L0uw4Uq2VI8Tk6kF9rIYwGF_X0fyOddPaqPytkpfX0RUSlZwKecpbVYO5bTahwt1ysRQEOn0ISx3lCyDAZ56c_ketP14YnTxudiC3.oy1nk4v.dR55ryfwvVmOgLkNWR8_i6.AFQu7kIlIKYfa1rE2WQdj0AbCI9Qs4NrgCFd7Lpe1Rq4wOO1PPLxGBnV4mgCMumtXzQt9Q11jv4uYnJ3jT7xCt0ztIat9xzxPJARM2L9nDRYWMDfev5HqIb2UGY_hdEmpszwfC_nJ7O_LBt1KpBdNSTulY.KVHzByt1rbexA2Eh91Vneslp_n55oVBIx3oT0_XM5k3nhXS74f7v81xYP2FAB_pSgzhBNoEMy4rvxGdlcBnn2C50jJKAvY_SqRnf_qWhZmBFLF32x2.94t5d9qVWH0zNfB7KZFpXnKbfwxdOoyNyWPAq5qDN0MD5JJ8GJa8FjTkE0oXTvWgRzz5dEnf1qgiPWaV7.Wm0h9HvLjK65KYLrCHq7A7Q3FSDbY29Sw3pkj_ya0LTYswLs8sUjnGWDE4ObCtKD7SQdcNtbfpm1XWLqYvMvcIVQh.dglCGpgMYThEpE4B68VPaXdsct2qCzWBT.C2vOdL67N5K1c2h8IOaoq83Wg6XOjk7YmbTBmX.kgIOmRdsUiozon5_ZNMsYMxzN4ZVQ35qsctmdFri85WSxXpM9FjNhSdxMKGeeDtNIFQ0g5YmaUTjhUnbu4fIm9cF8VDk.UE2HXFpLivTPKRBGW5FveGCjSpSE9IUFravCGaB46lKUwbtw4k.OGSeO7.ye4dJrQc9V8O2tqEqsREn5iLFQTlcVCwvfojS8uWe_.zi66hq96LGowelpvaymqmbBsiHbikPRouiGUFTg47pTB3TOZwMvdY.lSDjUFDcFfiKpbKMn6_raj4mgR6H0fjL9ne8l.YXVA7xR0LOYcn_1LCwgxGMrKzn31TofZFrYiFx8oRqNRp_3n1Dr8T7PU4yn66YzKw',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96cc0c127f577007';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\/lpiabbdtgcjm\/?__cf_chl_rt_tk=SA5D_jINMN1qUAUZNlmhl3Dvau1LAp3_GUaxPwH6OA0-1754792773-1.0.1.1-.JDLuEXeNn8li21knxlhfySOuDhhzGOqu3SfgohhhN4"+ 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
