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: '96cc15b5eb3fc557',cH: 'PbximJmLq7ZkHed3bEoTowFpn6glcCBqKHiPl7Bcyl4-1754793168-1.2.1.1-0J9wV4f9wLKfJ1F_mvWwrB.TESK2cZvRNZwHgR4U1vS.qcuCN1lF9.YMtx..ILrd',cUPMDTk:"\/u\/ckhajviqdac\/?__cf_chl_tk=B1y3Odezy5eIY6aPFc3B.54VDf_hrfPAtm.RTKbonl8-1754793168-1.0.1.1-gOq5mhGIh4qb8X1uuANKxdyYqnIl5UzcPGWmRVsGd_c",cFPWv: 'b',cITimeS: '1754793168',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/ckhajviqdac\/?__cf_chl_f_tk=B1y3Odezy5eIY6aPFc3B.54VDf_hrfPAtm.RTKbonl8-1754793168-1.0.1.1-gOq5mhGIh4qb8X1uuANKxdyYqnIl5UzcPGWmRVsGd_c",md: 'CZKzRGSpoZc54VxYB4Pd4I1u1AWebSVPbD7FD0kY7yk-1754793168-1.2.1.1-HBWA9_NPkhFnKZHI5qukVDJgrV9FMLiyyAkBD33ThiqIHEeZUQLdMKoBkAsUH9BzFgSn7MHX33XtDZXcJPfosS41Ar0ZrnqfAh64uEFJwBP1dAIVT3n_i5Pb_uCUPQQOd8TqS2gOQmt8o0p.junt4dT8iZCSRvvAZ1MbPcJmakxP4AbpoieDnRJxOkqJ2TUNorT5pJ_DyB.6WcGp8WEGE91GcXQJFEdnoe04Gnnll5roSIUyzlPjm2nX9YxuURNWthGo09nUAjoHsVOH.Jkm7waDlt0.VW2OJpgojmCuoKI46pjHC4H7O.0uL8a1I8pzukw90rnWtSkaNbqhkn1K30GiK0MqHb6dybpa8XbVpLnYMgK9yfm_Z9fatdtI5oG5Bz3h.W.je3U4EfYwjeLSCkb.ga56JZ46YCoH9NirLevcsb3_JvurZz3NWlR0vUti0e9h9WFNbxEGSOd0Efvw4edy6TItPzA7kdjnqVwk4l8V.r2WzH.R8iDFusImSTpfaw6MoymgLiS8c6Tcz7rtSjUaWWjshp.2L.kI0QVMqPeGsuOvOWzFQKXdPlCtNsVXOLx7t8J.F8SVUAbHsMkhDMz8hl5WtH0X0K7V_SL5HJ3ds_.jpnCI7AmFNbDWNWXXPt7wJAo.Zy6uRJESMK5LrVYwghtfzcSZRe5IhMzdiGNh8AsRpIgHirHfGUo7j8hulnAQ.Q3d5GRSR78XCWfWGHNo3rGKOdyO4FdTAeyte7ghQFD6fBW2yao_vUBpM5LV9zQoN_dFhJJuUXbFwW_rcnlc99BUpLlUzmRDcvhJz5s91ZvoOXEnyumg7H7xAoY1qIeU.8EvcvrzinT6ZT5RNKTOkYY9zsheqO2udgESvcDbhy1KvaG7hCelEKuYAYkUWf0n27GZsP9kx2qtlnNRdrkMPxCUHejVKMmi9mM1xlM',mdrd: 'fJpD1uolrYpaE6yBxmSxKZGpCVYF7jWSzUaWJ6RdqDU-1754793168-1.2.1.1-e2oC4Ykxse11GX_GXdIfepQhGC8oJ6bDUZ7tDh2jbGUyqNk9BrPeC1Nv2zGaTxk4GHt4vy3L0jg7U.uzjyoKKDOJlOHCf3OlQe1NNM4nxGHtZeEcH7sefbY66g87nrzQOyOx5rMitzQm511_KlSZu3jU23.p22WMyZzeevJ7mCWSzHnodmOCJLMomXlmO2VVKZ_kRgl6hWa3id_YCiwC_r2YALPzQ8B2eI1G_xGCmbfik72N0IP6EY6E7wqGBIv_ahLmjKuUGN3eyafuWWS_mHs1KTqK6oPxDCkF3ID4fE5jhlM5J1GI3tO6XXckINwg9w2HiwSnqwx9gu5a6IlHrY183ktRvn87aOjvDPhl0D2gFLpzHPCyfRKF.JeRC1FrA4YH7TLBwtoqGUkMgJ4RJNBIK_u5UBdS1TKeRmaEAdRzouVCpWPvASYHMhMAbM8eKnAbSjissKYP9LyUANsFjY3AoUQ9fHAHZnAMdaV6BsMG3R_sEZjsgXIGDfcqaUNDgXFMIAK.163Ct1F3nxEtqyecjTIHVg6qv7pohFdmAB87wB1vL4qy.M1vYyMGk5suKfxWZKVpna76X7f72KZ1zJGCZxkWSsd.o9C3HuIJ5trWEgZK_5XZUv5TbJkUopATjWGL1_IaG_VNP3W7rgfuBHZDhZ9.KB4yzPSXP1sXoQIbvKzCWLxyl6zdO0o4bS_jUtBornCejoWUOadOPuyIt4W.abdeIwJfLkZgzk8bI.krLjixcdxLOhGJGn_vUUI0mKYKxFjQM5LtgsZWN48L_xDdIPxfjr.Njt3ZuogwbXTbNSteWVBG4ovg8f8zrY2z2Y8iXjGYatac.NB9DQ9AqXyQ3.U_T0vrzH.uwkhWxrdkABF54_BEUkuOZUNBUhO4DFjj4aVRU9XKhwGxIDot.A907K2QhXbGUhCvQrCLTsmurcrODjk9pUqXpzBlKD8q1PIpEY6gwffEVheQBUnb0aOk8XCDKufq6d.2QeE5r0WS3SdyygD7dHIU5bgPZ72D7E1Bxrnd4bs4zzOFAefekuJ1iZm3U3hSxpBovpUmdGZFq_hB6JsAmGcBNXuZM07yEvtWQm3ovd2va9G6w2bf.NKCL7dGbv4vqHTNVSBiI.qrAR5zIDh2J6sY7zKeWu.V17sjLilEp9nEiq.Pyz46NxCmatT5k.AHQUIcRmMpc8ppXin.gKchRNsTQoeb2e6tgCbOZy8IsSbhY8dsMKLs0oj5lTctEfXMaaWvaqLj0kK1NNWIwD.T4HGz.RBFFEmcyX0kK4xF5cqICkZoobbrni6tJwwzV4VeaHhWmZ10CJFKFvBTOt4GPdUKDm0gIn.pof0uwGjFHOQeIQIDxspl6007sfXS2j7Lsdnaa8U0OZHP8Cr_w5dLPyQvCEcUmy9g9WU9QhX8rVj43hA480cOJqvphYg6d6eUKnuc2vWqb67Qv5Vd5bYCarIqZ1t_RqbZ2npOx0QFzNZFr6rGKHP4551cNRNxfkhIB8dBB0.h8yf0fhkWbFMRJj_l2VrcDR7t6u3IwFChUjL22KvDA.Q3qsT9mxnrN_OPHSzKkfHNRoac0SUXNQTY.jrRALU0_9z0C3fJsTcINqpqNqSk3MY7BaWtHCKsnE1yMRzIyWg5Z1c7HJgHcOXlA3J0sa5l9PKkVNzXj80OMDyzp8eLDKHk0HkAXjN3sLv6zjmmf5cQQoHwzgzLUuosQqZuy5CTNtOv6iRv.M6unUoNVPLPttyU5rg799C99VWCE.ujhX6.HyjQgcVIV2A0yERDWquoDmDDWBBTzsfK269Cf7wJOxdeU7AodfqztN8H8BGDQe4B0m2SLfsQfSvZUk7Soe7zTpQMyRfwh2B2W1howOheCtlpfp9jw6gOxuDbapAwhVccZrw',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96cc15b5eb3fc557';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\/ckhajviqdac\/?__cf_chl_rt_tk=B1y3Odezy5eIY6aPFc3B.54VDf_hrfPAtm.RTKbonl8-1754793168-1.0.1.1-gOq5mhGIh4qb8X1uuANKxdyYqnIl5UzcPGWmRVsGd_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
