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: '96ba9736e9081697',cH: 'qo_g61ExUJDXrS2bpS23eahmLrWqN.JIWJO.APaCl78-1754609729-1.2.1.1-GXIf_zj5qwSA6aISRmvaQX_IxVVX3SEPtovtuo0zxEkoAmAdCy3_n.Yc9_A0lk1l',cUPMDTk:"\/u\/gletnbjuqnxhk\/?__cf_chl_tk=.XpXcWm0hl2xvY38d.L870FUpCkEko7D0PEBFNZ85QA-1754609729-1.0.1.1-vjOWR7VnmpdlT9PBSWn0uC6OkuJ6oeUkLxMqXRkmbZc",cFPWv: 'b',cITimeS: '1754609729',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/gletnbjuqnxhk\/?__cf_chl_f_tk=.XpXcWm0hl2xvY38d.L870FUpCkEko7D0PEBFNZ85QA-1754609729-1.0.1.1-vjOWR7VnmpdlT9PBSWn0uC6OkuJ6oeUkLxMqXRkmbZc",md: 'iX1Bsk4_IBjfP5RCCx__QJRjabHDPwwwf6WPatgdhKc-1754609729-1.2.1.1-qPa_De.jpqxc7EViLW8FdPkShkt878_mt6B8zVLkuSBzBiMT.224GuB3gxvD1xFNLRhoFDKGcoFso2WhDTrVlpJZ6.VSGrI2WdtDvt1oPYkdTwe9BGXQ1Df8pslrE4gzfPJumIbmPIAbYxsPxvS4sT2ABgwmIepTMi0xSFwZtcE4pJpQ1dlL0_vloHtGTHAJbA3hfBFq4u0tBho8O487TE7.rF3iZ9fb5CWT8naTMmQKu3cvgQzVqwF.aBoa5W1aJtQANf_Up29EGcvXUHXl.x5lzFPAPOok7Bq0Q34N7fp5HTztBg2OMOFCkp8_Y.lkAeXUY0dr4oZybL41TOiPlReXTydnsROzLnAKeoKWkDG1TzdwdHCNhK2XWD.FbplAcuvDWWOKuVds9Wf419tLNHPIKas30UxbMf_yjxsgQv53tFkZFHXo5ULb8CY7.BPP0fEDxbHDLToziaTkjDfDpotogpKff0OWNxroOhhsPoA.ABZER3lEZKhmfkYNObkO3lB53GQ56tFNn4Lx4lF3HBcIhyotnLQnA0eZjV1mvAKPu64alpwV49T3bG_0mkGRfU3W5gLjFvAu3dPuMwPaJBBsGdq34IwizokMF9wO6EbTEEFakPbxi_EhKNT0rXvhjDdzB1qq3nzE5JSUQ3myI06jESbIWAc47x1l0ZMqdC.QYNwQGv2nhaDKwrC.G5i5BJ7kJs.2l5XvtgNFfjS5sKwCbsWmXa_2W9s7ITH6b4Q71Nluros8RlYPQAlvIvhKag85su0D_yaBoBtHw7ABKw_P54URYfxnSF.hm1ysc.JNJBCZs6i8ODNSFgCN1x0Mlq08yvwI53DHcGhv9PuehAvh9K8PH.lgPzORMddhJw.1mblo9GRH7sGZcFMAb9oAB.JzXV9n9VxF2wqWjz0m3n_5Lh_b0rNekNLk6oXWh2Y',mdrd: 'gbrPzc8DdRQCYMMEUWsCpXwpzKU46eav2tn4I5MqQsM-1754609729-1.2.1.1-_sPsSVaEhIVgWs0YQrRz2JnejrlHUyu9qKNizTi0KXIKqPvqulYVuGeh3TD6RZa8ia5FED7a7YcYhhHUBT0XXY4LLNEPPdzrE64bDe_X1gNdxZ9GfjKw9jwWEq8mnDhFId3yHwU3fYHDVqjG71ZYCtJ8fnVM1pmvZOn6.4dJqvmiybYrrEnNNJ0AmRRgIrBE6wTB0W4auY.fFO4ePCiMGPT7p3No8_LBYUJ.rux6FGa.7PdyO5971XTF8vIK8.qbD.B6FtBqTsPxXJ0bfyqRilaiCHVyOUE3HXBdlvlQms8fSWwj1XPT916CsJADfY8kMbmMGpaU1nNM.rfGGePY_Ont02LQ80O7Jsk1eXlrP6d7juTlSQte8Mxbc4RMRMTLAouees1E5x4q3zfYdhfhJJPX7prL0Nqh3yHAmyxgGgHA1XAoDraPhBXlIFiY4bn5DALnOVWwNFlN4ZK1hP_Xce6vrk6ewAOW9yil0z4Vb43TP8QY_H.0V6qEOOqiXLnrcyJuISgMPf1eI6w77snPl1yQG3ThkMNSCs1FYpi7InOZl2Gm32K7QNM13UJYbzPpFbsZFCsZql7cCwu6x3iqwFZ.S9TpS7OB2dy0uHviDR6NGf6XIafomdkdDCsFU7OlSaSFogkxxHYI3S.bc71rMNGiwdw3hk3ksMWx1anA62L_o8e2Ej9fTInHYWPSCtaBtJaKVyo45EnsCkdHqZvYBsbMdIBhpTU3ihur2vzxDq7Lpma.56Q998J9pDXFLZLXrv0s7ay._dYq9X2ysLVALa6_T0bD1zvQSEHlXIXkFjCES3RUFlNwQDn9N5WfDLNiXvAF3lI5nrXMRu1jBypOivfD.q.fMFlRA2fcvHfc42QD7iAB_EysalHWMDDMP7KqK_FpSnIek4iGlM_yM5ISz3HbIy03sW1AYNKad.T6wzaGA2GVcfXtYX_MEw1Nar5oskpYtjJLlh6AK5lCrMsFecHo48cZPtfy784vlnhL0CyRZWeodnET9mHc6owSUcjYaOrsHS4v11kQWAS43pxIbzFopDGzA3C38vQ.bMmtw3x4xp_4nXDDCToaEEWaVQuzloreWhFsikmBusVRh99HLOtv__AjvnH23BUYochPq22quuWG_KFP7QzanRKcQHtsEcLdMNeshH.Bwe_fBKEWVxlrVXWiiBOWZCPh_EIAhPyTMaQ_am7W.CppldnYyhACE8_bN_N5RbUexGTyEsL_qoJ9XRB6mGE8TvptsgyWKqXUy.McjM3GdLy7mPOFzfhs32.xCwCNwFXpH4Pd94Fu_uRb7_HNSVFHKlmMKcfJM380DLG0s4oxvvEyNPll701A4nn7FWPhfxLKp2FMpr8jOoVMv9lY017ju6GOWjdmVwbSNvA5DCt_pXO1ZIZxUoATQvL9jChsAWYdiYPJYP3.e1Hx3kjAjJHTtLH.8IzSrAzzooRAPAW3VtTlNF947Zius9O84WgOZ_KQlIiHslQqUNMYSc2QaoofiOd_E0jP_AzKtByBw8QJci4ad4hR5HNAEyko4rJz7ssqVUj65Vlk_WC69Vqk8hhCykTus7YK5zUuyDip7iGLyw6C.oLK2nO3XcnDsNNQWUIam7aqkqI0urW9c.gZ5srW8q9fMf0zCXWZ_UoUsQlY9U.UeesQcJYwxv8Rff8wK7gwIzTv.RfrfDxrwnJVeSonmi3Fgb9bc2W5Vso3r.KZnShq.GsiN.E_rrOLNSsxJBCm5hlkj48g11KV9JLIWZB.3CQVEWVehVmb2PAfhHMcc6zgjCDzPg1vJutZurt99xPkaFcHTgZfOlxtBBZkfrkQ1apuGkMd_kcGb0z4iAf2dCIkCavicwfO4luY0kWFrY_QDmpMimmlP76OH2LlrKunmr77VCuTdvE',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96ba9736e9081697';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\/gletnbjuqnxhk\/?__cf_chl_rt_tk=.XpXcWm0hl2xvY38d.L870FUpCkEko7D0PEBFNZ85QA-1754609729-1.0.1.1-vjOWR7VnmpdlT9PBSWn0uC6OkuJ6oeUkLxMqXRkmbZc"+ 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