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: '96ba970db8182018',cH: 'H4vDpMw0v2fyriC3c.zEswGz2ro79GXafBjuMQsHr5U-1754609722-1.2.1.1-5LqcFNRQwfv3sTYTld615hms6oHdL.IDBhbru5.xhrtJ6q64jQey4GsQBhOo4yRd',cUPMDTk:"\/u\/xmfrsumumvk\/?__cf_chl_tk=rhpD3TKhSDb5pNagKCeGfOH7Hf6b9HLCColEOEICV.4-1754609722-1.0.1.1-yZA5bGPPk3jRu0t1h42NtzvRIMivsLDYKOmOE0GBb_A",cFPWv: 'b',cITimeS: '1754609722',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/xmfrsumumvk\/?__cf_chl_f_tk=rhpD3TKhSDb5pNagKCeGfOH7Hf6b9HLCColEOEICV.4-1754609722-1.0.1.1-yZA5bGPPk3jRu0t1h42NtzvRIMivsLDYKOmOE0GBb_A",md: '7WZOjx77CPYpkEPRpUdAw6eaKDJ0_ieGIBeR2k_.UnQ-1754609722-1.2.1.1-x52pdo4AMgKougvbYaM7uzxF_.BKxN7u8SQeMD8zx1V9TDMIzxShF25QBUkn7j9.l8bH9x1HIlaFap7XvZ6My2FAa_ai9oeUnORr6cmJb474Vsd_FL2IUl4BnicAqriLtYbPQpDsuG9i2Usxewr8sBWrlJ.dy716q.Dpuaa6VrIv8VXcOoWHiMgO7378WBmTBiAOpLi6d0.8t3G727hRYtLrazBoqDkkbk4m6xoiPaShiRpfW1Gghl_Qsv0BRfizjiB0BG2p7s4H8S.cTi3cY7h4cTvex5v3SpsDvNn1MU3mw3QV9LWiwWheyhRQXWmugczbCgGmqJSCCO9kUFVz5M4LriJza0acFrANwcu6Qbyy8fbDjz_aDmOSZ6auwgG5ak7HmW9XrOXeyB5ymroqXt5MU8IwJiyorLhBWxDejFZLynfx0FqaoWwxTwPUnQrgAstFCcD_5_lnagy.B3BNVi0ycKfMo76Mst2McSCPnPSn5weQkzKLH2j6KSu4gzTWx2wnKGYLpfgMD.MJGNnMpkamxmFya5uXblOXE4zVqq5eZ.waTyv5XM1cFwrwDOZAQrx_IuyZBdRwd6zTPdIMgu6AKKJ4qSnBvc1qSIjEy3qfm4DE1qPxZGROvFVhGraJay5OCsfRVxVlQYFYb8XCfX6Z52BEYR_G_bM4NTU2PwHNp6OEM0Vqt.iVQJ6W6wR4gpH17whxtuSuACHXuhBzdWxSEzuQu8TQH1V.wRLfKDSB_oSJ0VSlIpLxog2c2XZGiFLwwzxL4KcAJ6YhVfki3frcVJa2Ix1T3OHf84o_VOCccnOnFXZm5qVt_M5_ufNLrtA0hK6EwnZXQAE3rKYvxxdQFAObH_3m2WDZYaSJffJrW_M5_jGgWiKDh2kR7Seo.7D1bIr5MPxDDmN4YJeoQ4RnmsN52XyaT8Z6u2OwyY0',mdrd: 'GYZ.tQdw2u7nhAoM5Jfa5hFX61CkLw7GQtoAwEqIq0c-1754609722-1.2.1.1-J1UBegmcA1Um7RuB5A8tq461wV0ix.zQ2TI1RKMS2o0wS.loDbkCxJKYZ5bznfYHP9vsZIIDSoCjrGB6QrkdLJ_.qTMCZY2dwe88htHo5n26a.XOyAneJcR072SQQqqFNJliDHZyp32fcrRLo0ypzBBRZlBjIrZg8_SxVvpb2.27T2TxqMKhXP4aRwY00mB23mX857tEbcFigoPOJkeLat2lE6HWpVVxXO9Iag2aAR4xOSOc_ac3MnXdyAOLCYIvoxkYdTXMNMgMpFWEs9kkyDEDueO8qYpJdzs2a05cBdAI3dIkNqQ7DAyZtsXTGyf0cJETcYz3qwJV1xpoCuRIMmj4BoyWzi.8FsBN7P0.roLLIe8v1LL5B5BdX0iXJVSmzA7cKnqgNNie8cdofQXsC3SS2np5OknoH4lR.EhtJOeOXESwdSnLL1w8xzx9Lo8n2DyD8fbUbCX_WuKoHA_TOBPpEZ7DgdICInRQSFIPTfzXR0p0FXEmN0abU.Jt371_Jkn96Y..2zFYP_sAnIIZe5wb2nseoAPyvjJDvgg_AhxjBu.bGWhGDxP3uCVyxJly2e4rdCaY9WIAj_TMdYiSs3lpghCtpOjlzgSEyMCscfj_QPV.SvMk5yTeJ_Qghg0IF.wa0aIZ6QdI_r689Hrgn38.FtW.hG1dYkdw50CO8QpG4xrff5aSb0ScMZBt.Tc616cgtl.M6ouJJ8bD3P_l_mwYFQfSWoW0J2VgdaUUuZ7kxwa9fevnJ7oL3lAhRPwL39ELyTdl0zNXMQFGi1gBrJP43X.ukA68XaVnwq0pv.nXIRGVu2nSc4RliAdOhsDdN.xXQFTYbBsiS7r7bcZCFKcFEmbGIppxvfK.gasqjrf_1b7hs4NDNDgrBRKZSad2aaXae6Moreb_4K8gXufJgc6JrNo_PuIlchk8y5BHrbyKEprUaxaxQzSzkw2i5RtEczVJHV4y.LcY3ObIREHCawFcr182rD3btLtLhRbYOPy4Wb2CtcSC4PbisBUJnINt52boFx79uyfZT5ahNbbgPMC5r_qsN8On7RbbXmRDIoXZ1G1ztnD1EdMCYNtmlZ2IgXjVb7CPm1DyqvAuhp8.4ES1JvnNi973.LkTyWfkEDQlKDljqlV0OxISdotr9_PCJnWShR8.91RytLD6heko_4s89dAzZlzf57aECGchB.TEJD7uLYPInmUkaNp5C_Nis35DWn4bnLmcxMNQeCFa6Rvq2_ZzClO6L1spT_djQs9tV1yxc134BRqTuJNHfAPoYHWwQmzSPkKINWg9jlMvTiat0ErlBBg5BJ7ucpvoTW1jVf6m0gpo_2FiRH13ooVVhVgVVwcP6oOQs5mc.uWrjwh83_ldlNEBcAKWN36Cr1OownhrPBK5bhVzxxMt3w0laZ8hrkuY3lUwwWO72QMWIRi_pgMcC5bnJiaN7V8Y0NrDolgXoftrXfhXT26Lmpd6tRzjv4wm45BxhYQ3AuYU5uD6WtZwD5hofz1t5m_5sDKtqzyTvrcpAP7_Fwe_XamGZOdduaz3Qx5Ah6DAdk7eOBXEYSBdzsIIpdp1Btd7VvhIKKyxXhqG1CP__4ickX6SV3VHM_3W2.bV8sp46IE3FVxcgb_DmwpMd9hNng7zZG4fhQDCZcg7YsOW2EWcn7n92UIPHuwISLP6Z1pgtNG2DCy49LijQmbPvKvCox1d8nmpLcbGlsxvt7Gp6lzoVcAGcOhPMxYSnSctJjUH6Z.oNalYDH5rgwr6pA9TNpzUckT92DFPmQ7GASyVfaBH_64AV4aj_s0RCBvVnWgD6AE1TZCSR6Vja9AqxIxB6w_fak_7doPXO09BC2e8Rikcx4ldyfk8mLToV7ZPbb_Aa4KlMArEEy1EVgmjcRq2zYkZrGQ',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96ba970db8182018';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\/xmfrsumumvk\/?__cf_chl_rt_tk=rhpD3TKhSDb5pNagKCeGfOH7Hf6b9HLCColEOEICV.4-1754609722-1.0.1.1-yZA5bGPPk3jRu0t1h42NtzvRIMivsLDYKOmOE0GBb_A"+ 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