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: '96b3c800af60d6c7',cH: 'pEK5LRHk8iiEIoxVL5ec9OjYae5GC5QNbRkaOHB_rG8-1754538327-1.2.1.1-kPxVQZyfFxa1mFqwe2Y1i4VX.JlgjS9DcXbn5qNJ3bZ1K93ddZZQTmabGvVzPlxE',cUPMDTk:"\/bxwdicwfcbckf\/?__cf_chl_tk=HhlppNKV1wCkKQylD0iVzAnZWD8KKF8Rh3KEL53ByGA-1754538327-1.0.1.1-o66cGvNpxDMmeYFW_1qxCQ63mgi9obOQkhVl7Vh.UcE",cFPWv: 'b',cITimeS: '1754538327',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/bxwdicwfcbckf\/?__cf_chl_f_tk=HhlppNKV1wCkKQylD0iVzAnZWD8KKF8Rh3KEL53ByGA-1754538327-1.0.1.1-o66cGvNpxDMmeYFW_1qxCQ63mgi9obOQkhVl7Vh.UcE",md: 'eGNdw9Zmavcn0BtDxQhbrdKHgYYngPf0pGoZ5lA35VY-1754538327-1.2.1.1-2GLfmywEu8ixY_oevZLoy8_r9En4ptyDFkZuzdcE_20Hyzr.87qEmjwyI1dXVitq3PgIQxQ3diTkpuVXIM9.ZX1ZtU3KiYoblVL2Joge852QM4fj8hYgNugohU1CKXx_uHAbTYBpk2EoUkG2zHqWDOUfvQimU4zvJSae51ziBYuE3QycZDsUpAj0HO1Ft9rFlY4ag1Tcx3wAgozktxK7py9ugsC6d5sfm_O2Z5VD4BZEFVn4JzmsQNGeuUkyrZ_Qj9zQqaHrjv0FhhzBq9gbFODxHGkydcW2t3Nuk0WMz__YPJZFzbMmgCFrjxMQSVSvlO7YR9uVXUeEau53QF5MxcxCvelCVKZ1xdRNnPriTKnKXADIY3GdjeIPUWAxpCmq8cSZrGS99mOLbsj8xxJmZ0Z5y_99.2lFQgEkZXKSsNdmOcGfi3OPshHtLreYacelxn9dia6nCqnT3dz.tuNj4TeFdakTkzQB_EGElpZCuSO6jiu1XSmSOCd_xjHum9LvOrRMR2FDjl_FimWl.uZCV3D9ZwatFqp907mim2e3ZCsSVWCKBYy02bSpuvqx2XutUMvS4DRS2wrsIh1PZpedVqDfiGguZ3mFI7LJX63hvkFcsBwV_B0Nu4ZN2Z0.D_oqHQTiwNt3eD.kvveAXoeLpoYEoHjclMe7PLohDW1hjL3WaqZ2t6JUkwH3gqjm6Yog44jFEkxa0VI7R7_zQhzHqEUWMoL2v9e19yG178Z0crsKUNjHOvs7WHmjdo7EM3XBGJCU2IuDfJ26Eb2F0BA3UA3tvwIaedb1pkaWy8omyEqOvAwqgxhpurUsxTRGTQldidVhtsN5G988weXpbC.XcNcPVyLMgp9UWIGlcJi39nAXMFVfphdKGK94.MhXrwTx8AG4ZNe7cMWRxEm_zaKLECaa8E0LoMyeV29MRW_Efjw',mdrd: '3w4h4iY9VfD1YmvhLvxWTCa35ZkIUwFAPfwhO9jIyiA-1754538327-1.2.1.1-NKLHXn0.vKqBBhiFMJ_DiSFjMZw6DvTTv0qMkN44sBAT_NdMh4qMbTm39MhFDw0kP0AtRWTejhoPXlp16DEJxabI48FOjxVhbfnk9h3lafKkxXSl7yfgkafzBSFWJTOX.CSZOWL3zrc9idx.kti6_.I_KUSJIcySAfNsurj0_JRvBSQoo7b9U7XLjpZPMsVkcxFHBKyUJCMI.mHtRlzQnjkWNjjVszZwfZkRzthKS2LPWUzoZ0YCxZbxoXRv35YtZ0Sqb9k7c7EJnFAUmnWhtia1juD5hNl6m0x6Y75ysjoOHm_ash9.RrLILmTzCkrGAm8dUU1KzYTdyjaU5UlugG7.Xt3M.LqZc3_SJ1GKM6UO2iRrTXFpUGjW2jbpzmcIudQX_OBX6paBnHkhNCyLg4TcOMju1eCWiNqVLGk6dqlp4NynG0eurtIwzywGGozmYeUpDLAr0IiVzDZmAQRmbl8VyJRVmicKsu2eiC.Pft35z_Fn5oHrTGaVGldxBEbtdQ8GVHHyGr4YBxSZhcFE.C.mWpwSNqSWZqgGjwrkYF8BSnhOr9SpwFB1iO2mIoqUHq_k0PCK4DUw35Axzr.LtJ2z6YeCvsdpjlMksLm3VDy1Wl_uG9p_Z8eFGErlEWSMzaeDUrBBYkgHbGjk6qySD0ozTaWBN5XRN0QLUDbgWlaUgODbSQ6s.K2K.3YLBTeSGkyYPX_OgOkF34Gxg4Roacq3_loy.93QFG4N3HdPf8mZ5QtTpEfa3CrOhjs9alpV8_AmTNfdvqLmUxN9Njuk91abtOfk1Ea.qprFbqXdhNfjElyfQxeBTM32WID2MToFmKPMdGWUwHDL61I4rj_ix9JEMEPO3DHDsI6WxnY_UPlbvX0.TfY2.OwoY8gZZetdFLovSWJj3BliaEaTcTEQjIuH.Iyaz1P7kXwUtPBDQPpGfXd5gjlwvDCCba6NgJv.Y50VvCeL6x9fKpdsa7FMnUQfBxKxk.80z8g9woBekbDvzTyG3iD2.pXY.cxofd_On1hYm0HkVExXK5EsPicg4eQYmmr372Pb0JK.fI5guhY_lrG1YfL7vbikoukT7wExqck21VTL_j7QNr4xBbTgQTw3uVDAUESUh6OelTNyP97nCRp21C7WZ9hyJIE9RKQVzg6EbfqFCI65Qjj0Qr43qxGJBTwNStUotxmy.jVlMdCmhQpZLySBYwl1N9Xgn.qXTwjLu5ZqD42MQ4Pdv3FLZt9L.FkHR6I5Z.8uWeY4S8aJhqtF23IKpZmBEGNbjLQMTiPSo0A4VTi5Kdqbf5Q5BQylxwVdlub.1b0vM6kvO6Job2GMGtVHhZNDDFnRPyt2BO0T0I6_tfhx5BBFYIh_i.1l93TR50r7cdrObDsZL_DUTn.wZcCzK5RPiyNOBwWWWPpha_v0g1dIcRovW123taPZLNKWcWLzfMtSGx2rLpVep4sUtRZ8IwyoyY.nMVo9bnXdlB17HonWcG8aqzEGpjKusptx_OhmEBp_Zxvsdz17s78U.bTpkOTm950jwn39b4MUjuE3.u3XJchgVYlFDYTGCHL2hQ4gcQ7Vwnr0Ta3IXFp3Jzbdz36SOvnvvYAE42TuvQGpBonzbvmHENYgNjjCOMjBuGIggiNM3ZY0qREfVm_9VdwfgjsGcgj1U181SXdNIc8IuVjP_8GLIqMjYestDroa104WW3ETXYoBu4.qarYUbZZAmAgezFgytx_xeCL5SwUoZBKSlv4_xEYnINKsBckcTMgx8IWqiHaJjpRPB7xzGl59l3B4GP9bXiYrvRhQykkQllckf1_H8FAH1OKx426o9s3DJIVeuq4CqbWCLRLxDE6b6fXLMTCIGPPyFf4AzM_39D65dLcIQqBAv4Qm17pcV4sEnZbenDUdKFM',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96b3c800af60d6c7';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,"\/bxwdicwfcbckf\/?__cf_chl_rt_tk=HhlppNKV1wCkKQylD0iVzAnZWD8KKF8Rh3KEL53ByGA-1754538327-1.0.1.1-o66cGvNpxDMmeYFW_1qxCQ63mgi9obOQkhVl7Vh.UcE"+ 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
