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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+");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: '96d466072964d691',cH: 'YtV0WDaw3Nj2Mb98XkuvEMB1ZOU3kXWnIH.tWjRGPOQ-1754880344-1.2.1.1-D3LVeDmN87RUoXufS4.GIilcGHS3ETr7OS_B7WKFIBjJBZpI1vZ3sp7f_N.aXiFu',cUPMDTk:"\/u\/atpcziejemnbq\/?__cf_chl_tk=H9MF67o48Ou4PDBPchordfbVGRCplcxyQCTAe6vwHcM-1754880344-1.0.1.1-UpXYzCsKBw1oWI0dM1xxDutuUuAWCLogDLKicM4UL_c",cFPWv: 'b',cITimeS: '1754880344',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/atpcziejemnbq\/?__cf_chl_f_tk=H9MF67o48Ou4PDBPchordfbVGRCplcxyQCTAe6vwHcM-1754880344-1.0.1.1-UpXYzCsKBw1oWI0dM1xxDutuUuAWCLogDLKicM4UL_c",md: 'pDKTwebq0Vy9okpWFBatE_gCVbYoAF3CNkhDAfYaqGE-1754880344-1.2.1.1-39L7Lksb0GULYUGaYgczBIO3PWOHt8ZQ..PDaK1pMkjWCAHof37yUa_OE3DeUGsCEFYFsKoxQU0raAczR58GO0KQztfiIh3jyCj4QZUjs1bidqZuyWUtodgOJT9amXR86BGgtI7NRHATm_XmT6sGz6VQLy0U1FW_96rbATV_ifrWJxGceX27mtCi9F4tCTcsgbm.Ieoio45oXGp4BoYVxKd17obLd3PnKXpm_TvVo96I.oWJFQx4eIX8YIU4txhU4GM2SySwCgWhixs.a7REp9PMlKOY1SgD6zMKTPAqZoHQxQxOaytv8I.1TCY.S1uwWBR.UxP28wcNjElec11sNhLa8DNpUAb1lpQMJB.pfgDQUR7nkclJMTIlHjKLpEjpBVB2H3Bie2G4KfqCrifsnB_ONJfh4zB8Ec4oghblQQsEAedvhyqbmvY6g6y4U.7Ljtl335r6MrGpIwunueHxlUceXd_WLGrs2VsxhQqnt8g.I5riOu177KX3SxE6yCQP7DmP2AQ05.gnCoVaKAOKrDw6gddoXquDvjwAqur831g49TZUxiSTPSBhvBONEvBgbAmro2QqBXnyoycbRrB6q4T.OW6fvfITbCjoIxRzTEiDhhgGR.VW1I.f9XCGS1sv6KYgV5T.Jvs.bds21ZgI8jD.17VBiFU4dTcizOcIds6ka_l8l8SWJz0J_Rpvz5TXstAY78J00vxhvnVvSvIjyh9f3yDyixzsGNlRLed9L_nwzEZge6nBG01YxjQfSNAPgkCTAMrrLWKT_BYJj6DaCE2PER3v.X9Ak9d9.KJ2FkNQEBBw9RNM3CVwMtH7EreV.M2phlMJ9WxjTo.kbO1Mr2uqtYb9rPAeT79h73X9ECSyAee9MpZW41WKfdnoUcUQacjqbqh.ce_rgSw9CFkTvHZlR9AyZZ0ofHp5cWDzt8I',mdrd: 'qXItCynrL29q0jdlTqst6IATHtdhtO.NLrhiJJ4hZiU-1754880344-1.2.1.1-QPPuffloBYrJHGK7VPk79aFtHFSLy3PxCvgu3x.tcYdshvWvbhQA3qk7n73TzXdEAQ2mtW7EuzUOkrHpkaWt46KS3RQ1q4mzskv6b4H.ORFPSJolAbMS_fH.qeIdiNsfkHHrz2k.sbBdFv9JSGBrc3c07MW5zIs6GJd.ZBZsUsQvwRLyskq3EYHhnO52f6aPTCaE04Rf_cLyH0ArkMe.Fc9M3kYs4DSm2RwFCcJ7BcfByzbZ.Y5FCEyRcvmpEyB9fj54OJ05pfoLAZFVnmZl25nbG1fPpZ1D9MOlgWjc_e1KiDOo0s7QSgEOMw.bYkTgApgRrJRgj.4EdmFkkfLMEvTJPfReGs0d8j8Fyc.Vk4p6vWDM3ipGAv.Z8gXIhi9rcFnSAJWzWclpko_oABvLnedbdJMDOQgTWeDmwWWSgHe1yshXSsJ.gZnk.JVWC.9hBHgeTvipuy6VYS14xQt.WtQWxOQb.FSeLc6GmXoJddak475YyzWutqhyVoTlXiOnqs79xMebHn.0zZOWXP0remEhrt1G2xDOM3ub508qgOb9q4ZwFWAgICtdV0snnIzq7XF73.XGK26AyrtqtvvjR1.bvqTPdayMlthcSv2.unADLlUMniddYCLbO7FQajyMlEOdIux05hNM3MBqaKYCs3Tl88BHxZ5q0WMVlClPSn22ODHPQ5a_0lNFivDbJsbDrBliHUt2S_zTEXXkZ_ikMERBZAAwNL2qgcoW1PNyyUIStGxQk2EroYeov_d0D_nBthC97lTAknahc4aBQN3Ds0QoTd.KFdI2c.DlSieGda9bU0smDg4MduIMSxaZHKTZet28a45.WT.cLmRfmlu1wdNCSkzSHAK1nbcCD6ga3UmtWyANUsta4ePXbmkx7KyYMsPYWpIdec47ZuRaq2USZP2LiA_GHGbirOSAByuiq4nW8c8s7qphFzOmwxN5qDHRH2VBOEtt._T__nb45j4pakw4up0hPY9QWFARg1rPRKOrgZ.P.k95sf.LwyGiCmlMO7IpwVd4EdotY86aEuD3CMcE8fAwsVJvKDshSE5bMdBU0Q.DB_Nd5uPLrU1dH4fTcaP9YsMO4lGYN8BSJ8MPS_8Zd6VdrO9vGoGdnfjS0VMSqmhv08ZWIJbWa6ei.X5js7asDBNb3zaTuNnxQINxy5Ujt1s_zj.9AtAfq8cGNmbfVTuyqptWQrKxKbVxmDDEndBxfa1BKRKql_NGYOkLpydxEKNl8nKHtKE5fFjGylPHFhqM975FhlQtDRZhuNiw2DdFDi2fMQvno0qFOHdw4mpRPTIaJzJ8Ebjp3_6bb9QU6EVcT9PrJJc_Jik7Fk6VEDcz_HK7vBCnKTblmI_.r3ow5LhIqPoeO5GIH0gSAmdXL66bT7xk1cEpc8iwGnk_RJYWbWbvUBQV.YvH9EKWSoK6m8qD_OO8q7XRnw8Y6T4Bgs06.iHExwNcA6c6JULC0e5v2phyi16RSWzhcpQbQEtGTlTQNIKxni5LRpDWCiEKumK7u8DF.uNwlvG4YS1rw9XUHBb7a005grwVI13ZppKqH2uEXc5wwnDSrasnAbQzJ902T2uJB6M9MwLVj9agnBCjOghk0b4oWAIweLS33rbPn20ZeFknU87AQAW922Yg3Y7XnqYAHxGsJN6J9BUe6BmFdDmq1Mgc4tmJTmZGweuluRqUWEdT.49kYVqGweuSyTKVLmTe8d8Yw6R3OxpUKOE4.12FocI7mxPKUJDVbGdho0C67MXMboxU.G8P8RZjQfrjbWSTgYRDLq.JF0srfnvR_wG6VkhHXyafCfYyjwnKbMqEIonmUNMtm2Coj1z7OpgNUpBmDFpZ8H7D_3T7.Jo28teDIhnrbbN8HO87YFC8dLPqY3QsLKQOahMt5f4',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96d466072964d691';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\/atpcziejemnbq\/?__cf_chl_rt_tk=H9MF67o48Ou4PDBPchordfbVGRCplcxyQCTAe6vwHcM-1754880344-1.0.1.1-UpXYzCsKBw1oWI0dM1xxDutuUuAWCLogDLKicM4UL_c"+ 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
