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: '96d463624e634e63',cH: 'SBUTSUp3vZ7XFh_MBy54x_qZd6dt_dZjBMH3B5mJKfI-1754880235-1.2.1.1-l_12fbe5CLYg2Ykwy7tleTxOT_VKJIOPaOnyGVJEERss4CVpW1hGn.EJG_.zisXi',cUPMDTk:"\/u\/yckyakxgvfl\/?__cf_chl_tk=lTHzFWfCLHfTCwWzSwYWHadIFecu5E.orOVk1KhXihg-1754880235-1.0.1.1-Q_teTR3FueyN8on65rb55tTTDgqU9enp8.UMowAheX0",cFPWv: 'b',cITimeS: '1754880235',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/yckyakxgvfl\/?__cf_chl_f_tk=lTHzFWfCLHfTCwWzSwYWHadIFecu5E.orOVk1KhXihg-1754880235-1.0.1.1-Q_teTR3FueyN8on65rb55tTTDgqU9enp8.UMowAheX0",md: 'cVWxeL_6f.NLRJ8l5_.Fm2ZWdQ_ZgYbSTuepQmkyulg-1754880235-1.2.1.1-EQAMKZCqIlEPCF4AwCF_Kfm65MRbcMUoNFRFW8Ifc18TonD8A9_ABlu32lWRdrDE_RwrnYbHajrKtlddun0PsMWgwEufTV9UBh7F5U9fZuvMkw5ixAgLJqOvN5nMOqvBRrtfeI2KagYWtYkCHMqBPokKxYiarkMq_InGoBa6NtjkYV3fYDvhzBAdclxol_yPWMqw5M2qkIa8o_gLr7f6RH8OxeWsOljNm8V41hUp4WWaU6gaTQkQWavyx.nvgpGS3q_KpSJ9OIL_bjva2hR3XLDm7mcMNWgzF90WH95YWoZ10qc9d5h1hYsdZELKJhjDFwhiJFadLsMMJRjbOdN.yaNcU.4QyZuUDbSTL2ypn.jqcvil6GGmpDzFwtxTT6UT315Ng3eyouY.OBTDnSPukbIy7ghewIR2DsTOfkXbGbeCNeN_BMxbanbshndFrOMDO2Fik2drEFFUkjcJPSo_slfibVFLQrqCHJAjVVTOgSqBuHbv_0AKZA.c_7pYna_1V6hbbiEFl2MWg6bJ3UyyS7HPV.oaxss4hTSUgsBzEmBVU3NGJ0MFgLR_mi2arfr.vsqYkebS2kqYTxr1RC9xtWS.ad502t7hwj6j.RM0nqpwyt311k2I7WyjrZZanfAir3hk8XmG2i.ZJkVvDAfeHuXZ52jhuwnTgVzIoqfcV4h3XbdMWTFNZC86HFnF.snaFGllFnUmV0hOgFd4ZLkrOTaCei8W5q7OQ2IEPgiRYjdb42vlUbHuRXCf46.RISm7oZNWuVQC4AgNuRxPBTuN9ehwKu._I_iIqn9883Yr.zmzg4RLLDLCQ9I3EyubJ4HBusAJBqUavn0WieOkiarEOeUyzv90oAW7eFm70QE92hlwT5L2Q7B_Z0yga6nIdnkwvK5PdJfFUjkui_RGAjNpCGdD4Kr9i.lT4wYZbVcCF7c',mdrd: 'H3dRydT9b6fyrX8MgpKSwwsb3ANPbm97WmS1aHOrowI-1754880235-1.2.1.1-Q659hhtuGmZDYYiSQAFammU7NFm8bqM8V1GlKCrNu7ZUkwaia_3QilmOxzTiHQM_QV3w30hABTKCH0tyXW0wppSSmEhtM5gfwJiSHy23ZL0qd9L1DeORwXSw6d1XymqlDm5QyULA1ElBFwVoARiy7DzqgEnSXNAt5QedmkVGmK6_HiTArtU0RcnxZ1dp3jezHIYldri4yiszmGE6n.ev.FzGkWpM.P2o_NEvigEBhNZnZoWcBZLOn8ESLMFNFBrZPFz_S.lkOfPBcPIIeX2HMu6Xaqlj67quKENsQ1eKPsj4HsGG5l70egcl4YCgBqfr03ua63VcUgMI3F.xVUNy8I9KX6h9vk0RSIsrlQXxO7ti6HOZZ2gucyXdLVqxtuNea.e4DO67oaWPYLIAePj2hTRvjffmz2BfNsld2ow7qT_yxVQbPt_Khf9iQRvTsHJxOTdbGuqFu2DPTpadlsAhILWeyLn5NFIACzFakOupTR8ixAXpPNzmbNllQioqvnRv8NG2uGyTI1h_pU4K34bNXnKMcgM.bDKtwiFifJzXkqBEa21knvsnzGSfNtRvz5L0jP6ERskXl1WwgS6xGA2A8Hm_3BNiEbwPoc0_Pmt.bG_C2IhsFSYwnbUy94LUN5r1mVpr3vRdovFvY.HlBLeBdiYDIZTYHZe7tR0uuUjEL3fG6GJoPOHdICzp4WTl4shnuP0wy92VWYq6mHFwD9zqe9dyWdbufxCN4t2n_HoNw4uncyvxzQRgojrxNEDxpc8Qj80tgypv5eGYzCr7yeBiSQo.cY2mWSs5DDDUAmFDjugjVnjYDo3ZSrdxHNcIeAj6mXpdn7tz2KoPkelBVdzfmIECCjece9Zf_9s8CplAo0DvWTZTllGkiaNvGy9_x.FcZkI6uNcy7rxeWzxGOw9fMrCoCo7bhLcSzJpyRubrhvzgRjiCh4KYxZYCveS4nwF8.KtTmLuNfR42msvM0DCB_y5Ng.z8aQXN3sLiuOmONmsIhc1qsYS6Jqe9coFNvyuLR6QET2xSeAtiz6OCzFPIXs6wmfJMa0jeHk0JV2y5TrctaCrLSnLHFzxmJ0kjimpT1.n0pfZiCYnh6qb7dzRnpPpRReT2Bi4cL0QBU7F7YinjHYofsBNgP6vomIW8NTeOMlbSsQW1CWnxiiXf7dOwmoEe1wuDqBAvE7.hYZXwnmtN96m3tJ_VjQ57Y0woUFhw2zVWV.GYpy969MjiyJ9bpcHsE3UheNMNDPSSDrh6NIKO.WuGAFOwK1j0YOqV8E3MusVUN8UMhYoTWwUjzJMAmU4L09OCvSLXVEVtVyZnKj1KZ7CBuJoGJg_WtS85kHOfjm6GDtaQ2qa4n3WyH6mi.nw5551fZjMIx8tGOjwJ7yhtcIFB82o.fNHWLW0Nm9bncYgCaw993.tuW_6vKYiKQ.QN21p1AFGvyn5w6qfQpjzGxmu5a6Xy6M38NAih820sTaF2VDrjs84EHVCIWbMiE.xV2ioPyuGo_Zj7EfEdbQrSYpWTBZY9m99Pk4fuXWdl9GvQj03qaoU6MQFLnZ.cqmitZAd0jdGI0JosFXexyCf4dBCyfhE7gfC2oaTs2lULUZvhIyPk8pwhLyTsY_NQPh1fXn.NklsOLh7MVkxrSFGgpowT4igOqawB6LFSYoEAVFMk8ZLY_x7sIsEMaokv3K2pCTqJzwGxVQj.sIj70JNB_aX35zNA2RNXSc7dwmiJDapxWxJCH4NrD1K.MuVwIWMH9yJaFspldCpsCpRHBHbMfNlNfI527WfQ3f.kvBZYqGlA2T2cdK6pZkFF.jOH_RwX2sc82_DlNjSw87E4wK7_qOpbdexLchg.8vg24rfvK6_HpHmcDA0OTrM3cOdZPBvI4LBm0j9fJ5GGgBr_zug',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96d463624e634e63';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\/yckyakxgvfl\/?__cf_chl_rt_tk=lTHzFWfCLHfTCwWzSwYWHadIFecu5E.orOVk1KhXihg-1754880235-1.0.1.1-Q_teTR3FueyN8on65rb55tTTDgqU9enp8.UMowAheX0"+ 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
