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: '96d46447acc75854',cH: 'Sc_Nkp4UrjL8Tg9YyEZmFzBKi.f53e8pBHgxr3SZj1Y-1754880272-1.2.1.1-71D6TK5nf4klwi7EbgHTRm9rwZxuHbLZUOFkEDbtAVVt1fvBUWJ1wrGZx6gLPmZ0',cUPMDTk:"\/u\/dpcjreyvp\/?__cf_chl_tk=XspTj8.HHPduwviTk7FN.wmCwNR48UfrIKcjtv0veZg-1754880272-1.0.1.1-FeJX0SemmTH2kc_eay_PVnByE9ldejGCs8.uyXUQXRg",cFPWv: 'b',cITimeS: '1754880272',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/dpcjreyvp\/?__cf_chl_f_tk=XspTj8.HHPduwviTk7FN.wmCwNR48UfrIKcjtv0veZg-1754880272-1.0.1.1-FeJX0SemmTH2kc_eay_PVnByE9ldejGCs8.uyXUQXRg",md: '0qxHHZPTTSL_qEROU_ED6DwfPUev0gqIqDUmomJb5lw-1754880272-1.2.1.1-w3KSSBbwalvuOUyNYf8rPI0SwAZjA0rShIkMbNlTnihgrHpCB2cOw3Xj_icB7mf3QZs.2QYD3rtXP5OUp4SJzfKSdMwnZJGUCXqqd0F6Cf_EnEgC6tZKbrIkD8LpfSqx9mM2UzSy__b4dqO4TWZPB4GwCCbOU9UdmI9qxAb9xvmFQkIOMR1.ozBs8OFnga0Z7P..a20pof0rZV5kIcmvtnYYLreXAtDIomlV.GaqKg74zEdRTkafXLe9wxevAmEqQ_nJEX5vj3E8pyaRrkViM1ihlqDABSgalCqODZ8MwiW0sPUy.TLHehxMpyYwqH1lF55K8ZAOgM25StRPaaZNT0CKQTNAOudgfikkxNtgXo0PIiU087xFRV8ZYdPNFnOx8p32fAIDjdtHKTtLMMFZgMgXJ5_pVFeCJgvX4PnGdcMm6AsZGCn6XcOIrokxTEck9UisiL6khQDGLU_knPyelR_s_R.tMqXTMlmRPXEtRtq2p2Iy9pkeVrQ15wGcSg8TwRUkzOqyV9tWmYnmnIU1IkpreMdbXKDuCJiptGtsp82Qyk1t0p5YAOXKz1ijG.0gPiLtitTmj9mXaZp4uuk3jWQ.bJRPXXlvfMhdPVa8ZB7OrmXyCNOZKlvGSRv.Y3S8ZF4QQlsX70NkpMVr5JAttFc2tfDI1SUa9CrVzu_LDV4Jxh9K6oM9Pe0WOOoHypqXOGFXJrX3GTp7Tp8GTILEIct51S3HLSA8PGsd3apNs0loiCbyUDmpSA0aARHU1Qq3Z4Eqzhn2MrD8CnfyRSv0lpodKeGuL2mU3bolY4cqYubCOPa778DfpNB.6exEaca6Am04O1GCTXYKB1n7QdhrMqkl8rJwsls08IVGRPJ9QcVHiT.nOwTH9K_mclgsHtm_yFDeGkOAkgc2q5R72yQHF_m2Yg1qW3bn78ZwnAE.sog',mdrd: 'jHFRRSybpgCpZYsUZxBR3omIFYkxME5jykP0_gzqRXo-1754880272-1.2.1.1-UhoHyQvkmXph1Ww.Wh2bg.9Kl18fCCwa5VLfRrYr1ttqqNkln4oH9SmRI24Dk8JNjF5bm3cuuURFW3uUM5YP853zdFmgz44d5o9kLJWs9E.W.msBFYx5CGH49BdJX3j0RzhMgEMscd2znZTfl3vXIoEpcUxhzpjvZ3hTE8FjRy9AdXG3hUIYpaJdmy6Jv..JWnYd9JEPMW61P0hg9eoAATO6qZPgV0QyeRTFu422h19r.5Ek3S8joFgbalfk8dL.J1Lc_jLa3Zutsq5jZsNmR.lRr238Z6gixPXVD4.DdP91Syern39IQHoIm5NCTrF5pB1OA84a_QenZqFVOtaNJpo1EUwYLifFGfB8vOCisSG5U_t.3drF11ye4QxHA5BfeVBUD.mNuOvW_PTD.onGqUlXJV0LNGHGLOKX1p3fTwvWR1yC0VXUC2RAdbhSL4Q4lcf9BzXl77lmoax3D9XWtG9HMLHzUx0WwSuZGiDUcLCqw96Ixh4GtixQL9aRoEU6wJ_bxs.4kD2ABm7gp0v0s4UEnsqX0ZcdH41KGJecr.s3ci_QjGWQSGbgUW4w7hU6BNJ0wuyqWU_VfEelf9Mew_yR0mv7c2UWNU37tb4rVHMPnEer6Aasu4Q6X8AdJ9HreWHIzCCN215Ee4KGDzEzhDSpYetZ5nbj1tw7VuNZOco0y3dppJcMm11PzcHsS11B4U4qPosVohONZg0Svrjp7XZOUwQd__INS2ZqPEF.i1NcNMUvqI_nc2fdleDj4ba7NTYrsiTe2BHS44OlJ0hHveIl8A0_hbJbh1MYbouffVdllbSOWveFPc2RqficqKBpVHBWJ2z9ARdTAaNIJFEoEzhv7KnBnkwXvmNNzuARlSylWPsY59itRMIjqUyAGZxbcSZSqJ5_gdhNPBHBuazoWZCkgfeaHT3HUxhvv6Omr6YPeLjOSI3bJd4RqKjLEWZV5hSMax8fvAZrMz6UVy8C96mupQKXJWC.Sxb_P5pUAlIYLNHwONwhynSVs76Qi.DubmuyR0mFPVQLRPlIv5E7wFqaSjH8MH5v8G6eqrC2dWWss1aakW6nqgR59X00D160wDr4farYGtkaY1H3h_DJQ4kiWjRDEiUlj.8eSkd3PtoT51lYyzwkNUFZMfCqsESQsfqX387QcC6eNgb6dGAU30yDZzKCld9wyoI_8qEyb.T6mErkEgOvmqKi3C7g9YUMTd6IP2vXFGTRb5xPGbho_6UuL.lPNfR7g8tsxP0j_MYGu6sQb1TkJ97oc4dCkyMFkquXgk2Jc5ZJJqmR5xT0vn37pMHcg6vI8YN81O_ua8o2aoDQunyzunnUJMK05KtAWJm.MLauWNTXy2LATPu8gatN66ztFLB9.yq1i994AK.1FyFJHmTPgUrqaFBLUPCw.ktuZ3Rl47BLZ2rB8jw9zpIdezmCcs3GekVsdd5jRYiE1Xz1qtYijIYYcEjGquh3MOXpdugV74LOMW.5UrSIuw7FqmajNXQdWBEAhLA4r92mneUgXbg1eLqwA_BjMHXc8EwiYu2oRr_B67GgZQfTuUQT45WQ.NrjK.QgK7qnfjdOdHLyhpcN7E.gNwRnW7j12mkxiSwgi1gtHe4JHRySHhLDoK8gaE99dkYklvTRCzfwIzCQy_hRck8A9rkORhmMA3mVoXLxYok5fZz6ShBofw6cS6TPHY1VmVOBRhQdkq.8SR3uYoHgLBkFxWvMOslpQWcKwVqlrEhYghYrO1_F7YNDqzcwBkbfPXVGCwA2THO4sMKH04pDQYHSNmCv_ugb5dna8nEJmQ.OljDt0uutk.VeixBOIJzD71FeYhuD8mTVaDlmMj0otKVL7Ty58g.b6Ir419W14d7vg26bYDWk3GQakmDiheOIoDtNAu3zXl8',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96d46447acc75854';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\/dpcjreyvp\/?__cf_chl_rt_tk=XspTj8.HHPduwviTk7FN.wmCwNR48UfrIKcjtv0veZg-1754880272-1.0.1.1-FeJX0SemmTH2kc_eay_PVnByE9ldejGCs8.uyXUQXRg"+ 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