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: '96cc0af21c009db4',cH: 'ZtcvC1kjiuhH6NXx98YrRzrDwXuHRo5jGydhxBW7DiM-1754792727-1.2.1.1-MMNxkCGZEdA6L_FtgeVYAyP.IKZP3kZZeEocj8rQXbzuYX0VzdSAVSAf1wgYlWiD',cUPMDTk:"\/u\/hunamfcusfplp\/?__cf_chl_tk=7V4BgRT5uVc_9kdrhy4krXsr83YMprAmxHaOWmLXcbw-1754792727-1.0.1.1-dpKNV.rv40N08PUgx2hs_a.Hlmz5SvpaVqbYaAiJdQs",cFPWv: 'b',cITimeS: '1754792727',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/hunamfcusfplp\/?__cf_chl_f_tk=7V4BgRT5uVc_9kdrhy4krXsr83YMprAmxHaOWmLXcbw-1754792727-1.0.1.1-dpKNV.rv40N08PUgx2hs_a.Hlmz5SvpaVqbYaAiJdQs",md: 'ZI9JDZgJKBwvYO3jIhJgwNADLWmb5UXcjNLJN4vxdw0-1754792727-1.2.1.1-XmooJT5weGvs7bEQVW873z_Eze3dkfKqwlAcl448pAVwfN6wOMn6BE1Alc3LBW9sEUy6jdycbSMyJyK6_zzuobDNMFaHNji_BYAbSQ74ZaeChJ_cWUNK0T.QsqGjtqwLvKNoWaSV6_arGnWbKX0w1NoBQw0Y5ejdjyUlysBUVIfZV50MTC96iDJkiuOjvm1iMt5gwqL9HGelvI7nBFBkoqIHFPyVsbbMp9VqBDsdhZs33x1ChZgdfVPv00o4j53ZFRF_YqYUaGCS5skwixEn3aB6KWyC5vPbGvVNGGtOBc38quU.vlIFuyUv3T3CE2xO2dBxHiqE_70IT3VmBMA7lTIw50Czd9XjUYb4tBF9f5PyNHVH1eP3wS8ASHGKlALN5m8OHj1xVjvXbKCYupFCopuWyP9WjGKIUcOwoH18A2hnz9g.0krkrNjzgzNvViLQG6470.WDdPpUCPZAfm75LbKq95rrk1pfQPqg8x.HJp7qrZ9TgRT8Wcb3DF8T9QGOwFWkXDY4JCJinJmHl.XqtpVwXrRts81E0mBOxVOPm32IdVf2rL2EXU1b1iryLy0hSeBTTJzpPuDI3gZAiKzrvsEG_Zwf60iESbA9MknayhySnvozgwQc.r8LTJduScQv3px7kRDOo3W76WvtvhlucGmGZimEF4LKJeWPK1vKgJRcXv.KwhpONpYI6BuxIoXLj.SAowy.LEWtrB7JYDa53yI1k7EjImCSm56Cn5IOIlGswXFdsEInaElNLblVZMbjVquHJl8V3DNvGC.uD_GB.y4r_E48XSEG4EfXYkVBACLD68zlYKr9VujBcXAFMGF9fXGEGFHxlhyLQ1DFQMj6Iboz_OMIgxt8lbwYwj_anlGxGRE0hvX62tTsmaFsSYtChlUBRHa.0rrtQyOm0NDNUFkZReqjI3BSWyhmOojYwx4',mdrd: 'AlJLBXq2lhJjIEmGrUG7N2mCKBzTWOBMUJgtFrQrOXI-1754792727-1.2.1.1-pooMgUd9TTEJu8j.TSUTz8AS.jw5dCkskXaHiSGQYE74pFRdVaArUTg5LqxC7Tf9XK6RcRjaNWQOG4iuy52C48akrQ3XhP6zDzRrUMc4gZzDkZ8MxowdBrljEg9KJYe3QSYiH27irFhEKFcOESOX2mNVT0CXAMB_aSo7te2tYnQWxfsr96F.JpGeSHhhqwt.FXutE6DF3NNPoTC020nnuxsRdpboQN3YEqDns0hjzG2ef4HiIfkJT6GX8Wz0aGHjZ33uJYCfCIIcSV_tOrjxKp_baaIBymFW8tEDlexKAiWGevCVHkn7rMib7giYGrd0rzOFTiQNlIkas1xHwRyXS83f01I0Bqoq0M3vVlN.Wn84iAca2PffVBXxbvP_mHYTBe.a0.p6BsZi9gm3KwCxCBwqmr8zLl7QssH6Nz.JsbLB4JiMsUFAMNP_tghiC5J2D9Gezm74CL_EQENsMGJJ4bFvfEHsJCz3E9.Sc6I2DxsQ1OViID4qiQ_uxdR4ROYDxeEBpaHFp1oGL8VE5pOJRT7txmdZODEAJNZfN4YUq.6gJ365HpUhFBsCSeCNmbSEjiQ3G1HGyvv1DqMfWKkmu_L.DQ04gzC6HfmQteYZeU7ddyE0ILpIlKd102pgKoSCDSahgG2bE7XayYeXtQuvLuo6.RU76JpHQkaljzB3PFHQ7X63696Wlk8lEl1bsjzx3EagPNQyPobZY5DtOflvhe86vAy1NPR.5zJDB56SJZfdRAE51NtrF4sxDGwTQLzbv2UJNo69GKuoM.c2uDBdnKkE1_sVJQufm.z2r15UN2iPhtxcOTCUS1Y61wiJfmAyekGz6YeJHD5exJJxMbBmLBiNrNehyQKqcDsgUe3kxxOP9fWE0z819oIhaB.x4Rq.XM.AF.HkqQeXcjyBhsznSWCZYWkmkWIra8xwpl5kKueqPeZq6xayM0_Xx4pyYUnO5yaReduXmIWZC2hzW_sgVmCmK2XUo2rRPJDdjEbtN3h4DQ7FOIssJgeSp51hh74Rei15pykw9OkD.9Jj7hmuuL24pcEd0suExKD5Jif1zw2LUzGdeRQEvfnhqc0cehUhbHCfPzcKGkllcger0lKwyQtrwM6yvtKgX6L8Gzf.3a1q3sdAmzAZQjxeylKiL4jcULSn3P6vLKGcpCMgvg_sU5AwxNxvVy6amKiz28VnpUwVIVC.2h56MGAVDOh85Awl7V.zQPHjhU6dSDWTeZAY_.0rkVk7b5lx0MzIUEWkpf0iAHVgKQlphtVmKPyAHmc_rJEwXLdDKvQ.Ah0YvN0AOuq4Cm0llmiDtjbtLHW2xXqRbu1mUP.ZW3SMJsZSPHSctG7LdpfxNkrYdBoy7darlDg8pccu.jH3iSHbkignLu_0Ko8F1HCeeNWVzn2PKschMnqa5b0E0S8EJfxDZeS4unI4f4yjYgGd7Mh4.pvAJpXO4HfqDzL61IdbRhjDNoBflcFHJlI71.eIYIy7gLC_sjFkl1XdMiz5CPpGuafHMTjgyyOIt5_JmsPB9nVMJNGQLAyb.dx3aKfDNRQJzKoJhrjToGQzB2OEEcKrIpyDAC_u7jS9GpsMagtLr3DpZkqYr46NzmM3wzo5prSJvSrIaaz23Tp4E7XdLhdQiKGvUEvIxyVBLyq.GGcPioWqCmBE1GYYes5UnyLWpaOOlROSJYxeO4hf6.E4ogwYNR76YHbOc7r777l3Mm.nhtcqByvHMW_DrmucqUseO86gt7YaiAkqZNkJnOsJycvqre0wh_itbD2Jr7.90GjpYMqZ_tRAp0kJEjMfkmmCzM15OrVn_EYiTwBhJCjVbYb1sA9UzXIhMElqWUCKpZr49_.RA9UqBGQCOg83u.rzBE1DJ6v19Q',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96cc0af21c009db4';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\/hunamfcusfplp\/?__cf_chl_rt_tk=7V4BgRT5uVc_9kdrhy4krXsr83YMprAmxHaOWmLXcbw-1754792727-1.0.1.1-dpKNV.rv40N08PUgx2hs_a.Hlmz5SvpaVqbYaAiJdQs"+ 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