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;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#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: '9507dd1cb8c93975',cH: 'rUkN7Ee28TjqU1Ju0GtShZ_zgJqr7zMwuwx8DW4swHg-1750051286-1.2.1.1-aX6rROfEhaLvo6iLMEy_.RqxU0MTfFNa0f9Y4Aiw3HhIE2ntmDC3lUGXxORwMGAG',cUPMDTk: "\/u\/tjljwamkqfs\/?__cf_chl_tk=y1lvBc2InniEVWcPkUP9QOh91clduB8IKBLnG5xOrY8-1750051286-1.0.1.1-K.Fg28ALgkPBZTJJoTmcOK34Xz972RvC.TIhiscG9PI",cFPWv: 'b',cITimeS: '1750051286',cTplC: 0,cTplV: 5,cTplB: 'cf',fa: "\/u\/tjljwamkqfs\/?__cf_chl_f_tk=y1lvBc2InniEVWcPkUP9QOh91clduB8IKBLnG5xOrY8-1750051286-1.0.1.1-K.Fg28ALgkPBZTJJoTmcOK34Xz972RvC.TIhiscG9PI",md: "_fvq6p2XBv2QVdP2IlU.erjTYIiCgzB2eOcrF44Twak-1750051286-1.2.1.1-YWBdt3Kbs_dH_zldejlIPoyGDDxq_kOHxL5Vuulszn0WH.ZMzbXhflqz3O.Y3gP3pyF5VhGlT70Wo9ykXcjmc9j9tT5w__MRyRDSUa3cXIcEo8l7UJoLK5KmsFBFp.GNsyYrwuQcQAXogkT0C46c3Cz8ZQEQAvHY1AIbwfKgpCpMKXd4R3eKNQyicy932qiFiJ_G1AfnnZI0h5k.8ULJGKy9hqkq7GGbSz6iV3t6u9AItW0grxj3rqKIMRmQqib59TrgJJG7iC_.uM7MVXCaluqr9FhHhZGNfFmuZOhNETZX9qahlF9yCEKltLF56qcTTG1icE0gkl67ssFk2KPoTgeTG6YRBOmP7SJ6Bwx78nIgQI9o.bXRtRWub5zhXj9xZ0QeJOGgDYdcgPdZJaodpZmxVfvzyAIQSjNf_tqpcws.dIZFn1DSDS.ZkXEfCe.qCJ9Y7Lp9kLTrqkNg1MAQkyfyuGmGNYErhK465S.hIlV825Ob3xF5.CajniqT3.JlMyBbUTGqim7nM7tlx6Yd_iAsGx6VRQJSWRSd.MoNQI0ybGKb8eXnM7jXOzbFmVTT02lLDqyglyzgAJaWGhg149v_7w_G4l8ZJk7A4156lwz2OOt_h4.WZkgswVNlZmrihkItLqMIH4qBUih1.Dh7MMxyq8Igl30AjXxS44FN42Q6IYLw.9aEHnILlwCJnNzdST6p3ir8eXZOGQ6D.Nlz9xk9pz5K1JFtOOORXQExsfbmxqPlxzgPeSDPLvh0k6zIfjvlPbQgSSmNFIzKFYiK.gk2rbuA_M1gKcQB3qr.cY2raLngQ1wdJZXj.q4HLMR0jVHWsBfXmQkqlniaJXYd.QeDK8M8A4ZRevURjn3Efc2HMkKvz3_T1lBuDv2pCi2DnlVQD2GTykX9pUMCAgVg.PWRUf723ya6XrtMlPKFvXY",mdrd: "aUjHS._0aAur_1kcVrZR4qd4hK48he3kR0Lwf0H.buw-1750051286-1.2.1.1-y6qTG0SWC8dTyz5JoGyhZYq1B_imLTblWwGJqGNe.Xvzw4oIEtdRcBZjEe893ZbNIKfCsn4b3M1ultikXR4CyEdJl9XI.hxvKNvF2O69sC3ChZyKoB9kbfsQCkQ83p9Nc8L5BpWz0cMS9KMvZ02FmQE4OC95cB5O72RHxcAQQtBoQEGdXTL311Y3PP_PvgkDoE_bcEG_sQS7WMJrV3gLN9OQ2yd4BMTKv920tjRaL4yBGIc9FtJIFr5gDDYlc256LYABYHgdzekchU9J8ZW0leenrrQPwSke76jUHPsS1aQqRxNnUTGxczkNCdExrx7diIE0RsDkX5HjyA1srmCaQiaRRyiEK.ZnLQjnA7JZoEq4F_bLzdc1JK3us6kwv5NVQFXJGGWj1ohGZzcJMhtENsEnzrlpjRPTldF063lX4f09t1RudMxzmpTuoA8iPHXO.bPYWmmnsbLuDoUQc6cXh2YTj5.rDLdbbVF6LD9yPHK3obSSc1t5bhUEe3TO_ZHaYlsiRod1QJbn0KajVnPR9g.tucO40mWC3Sjyzz6f9GNb9_hs4Uoe2qS0PCDSbfXHPRZeO7YQj3yIwkVtX9mpqGWrvZT5s7zNuNHk9eN7qok4qJr096ryXsEdhN0mxyNR4lvLr5lzugDFzGI81F6uE3yGUK2pxaX5iN7tkhO6iBHElS.E.S6arUKDtyOXJiKZVDZm5i6od0Z_RHmkG_3MwTN6eXeeoYfoxDf6SNOAqEkHZ77BbcuWKFpTHZL9isVBLRwcrw9KEMDVfmQhwlglht.i6PhFK0pseQVLe6xb26xB17B_TyxPDPbJ30TQhFJJmAfkeLsmxAt4oZ_4MxjpeK33appCKIErJJQSjxqyaLZRaPg6WqX6uDSl5gFy8q_xzjOrgf7MB2uVp1te2xnjwbY0.KF5dLX91i7vj4kGTrbDgfB8Ath8wfAXm3bGZisOJ_EH4Uqplh1BKxqFKSu93olOXrLCl9k3DK2jCw6zAJqOtKkUG9r4IGqbKCuxE_G7dqx6NYrJfDtmlBRM.K4Y5Cezw43JY8gBI51A.VSOjAgPo.HyKHtbQmOHAfeLxMgxgCCI2PDNB_JzKbr5VvLqskq.M7N3THRPHBY4RDIaVv2VJyVPFMOHBBzBEFDx__2mrEf9D2ZMLhN2_5lj5gPNlcRuNrpbCK3OuULyb_hYwflj4.apSld_Mop5VVSiyjZD9bIHsH1NFcgzuYs60zzY4eDFeN1IKfw9aOCQspgn0tGMQy_WjcDpt6DAlf3Bd5pFMoA6xaY2EPVPzq0ss68ExhCrbaWMvjt4kjkZWjKYAzeQC7kNQnWsV8.zDSu.fkYNt5RkhzmWmBQeQo_udJYuOk.yrdkVXQTza6agfqejCHRPuuVq_O4WhEJZPDf8KdDPhcJ4HJrv7oh2osVTHXYjjbUXCmreVaP9eVhPmMhRJCHakUurzu4btrmKNIias7kpHVq3ktbPwcksYfJKv224z4SDHRNGtUzeWi87c516AUCNK_t76_d39ptkX0.qcOxlumSpYgxncLwxCXpGpaL302C.SlCHIbLiS5Nz1.DJAt2CSE0U1Rsl0znimjWbRHYg.fsgvGmCUeb9GnvpnhGH3YRM39b7ZEN2mwVS4mlFBBB9sfwzFefuEhEib63_vE4SdjTak7RV4uAiSGogIdnVJg31l3rqbNpInH5QhzZgNKI9FIRIAZcnd7FX4BNnn5Xv3AvGFGLiOHfdcdRMCXE02ChH8hfK0E7li2ClEym10IHkWj0sPzjE7nxzV8VW3ErEPIVFE26Xk05CdzdvbsBkG8odnuXQbT41fwSTrX.wZ6UddnoyGtypjAcr4LL4A_XM",};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9507dd1cb8c93975';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\/tjljwamkqfs\/?__cf_chl_rt_tk=y1lvBc2InniEVWcPkUP9QOh91clduB8IKBLnG5xOrY8-1750051286-1.0.1.1-K.Fg28ALgkPBZTJJoTmcOK34Xz972RvC.TIhiscG9PI" + 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