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.

Source: https://blog-afff0ner1.mit-edu.top/post/4821306759

  1. <!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,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="390"></head><body class="no-js"><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: "blog-afff0ner1.mit-edu.top",cType: 'managed',cRay: '90f37be1abf3c9a3',cH: 'I4ifN8.nEc1ONwTDdhEMpLv46d1UTObck2txtwO3tY0-1739100170-1.2.1.1-dNxAB4EAErk77wckJOR5TB7y5qeZk3D.dDkLSA81.Zn2R7i8LFVQBJStknPEftZv',cUPMDTk: "\/post\/4821306759?__cf_chl_tk=TzsHC_x6pDoWKMexN5yzRRE4t29wdYC93NwAJXHQg8s-1739100170-1.0.1.1-3zmIg6He3BXdkGfn33o3fWAc4DYlLQG0j9XD8j6uaLs",cFPWv: 'g',cITimeS: '1739100170',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/4821306759?__cf_chl_f_tk=TzsHC_x6pDoWKMexN5yzRRE4t29wdYC93NwAJXHQg8s-1739100170-1.0.1.1-3zmIg6He3BXdkGfn33o3fWAc4DYlLQG0j9XD8j6uaLs",md: "7rpY3EyuSMV4NqsP8zmrDxdejMwhdRD74qCM6dl8nOE-1739100170-1.2.1.1-1_51wEv3uBFFjVr2To3iIzZB5Zm9Pk.rYudqwqiBrE1RWOHgaO8B.e4DSgvG7s75Xxafn_aIerL1HHYElrDtglZAAjuxBfMAEE9BepxXSQOTQNywHiNN83jfxLl2tnp16gIW8vX0AZJjYSUkygq2v0gAyBUYbihj2XRCg9WuFylN2btitnn3tdn.C4vlvwAsneF5SW20Q1IcQTJ0uZCRINoMfpZbjH4K7tM8wNXgtl_SoePh.551r5Ik__m.FWO3q2VQ9q7Wq4c5yqGEMDCRMjpzW8UgwKtXpo9wWKrAYO1xaKaNd5b.bYLu.Lf_saV2tVA5oDniH.J86BTYIw6xULKFmrmgaM.hStEfHOwn8ghl96xXapISxhEYdg.TGx62oKesqLynX_FPZzbvj7wfxflTqdoieJy0TMouxwwUr57MhOwG3NsEOcY8locBT9VO2.wyes2awZX6_lUK.7GMAbPZcVfzHSfB8xOOmuvBi9DOcvzeY3dBOzkOa4VQj91AaSzOUwTJTIkfRiTt3DWfamhTY5KA1D5Saux6GraPZ6F8C.JqSn6y9yL3mZcMpKzvqVEIxQP2wqggnpnEnKHThFzqjtMugTetLV7_cVTaJew93t97CqMXc8i8Guqwnavoxfz49pZWFS.59m.ghVRFxIQ81uUXb0d4M.rtrOE2pnbRYXsRCerDerVmgoL076rFHbB3iz6LloXG6FC.P6qRna7k1k0JHdgH02Lahah.EgcH.0Jwla7jrlNjeWtn7_um5wIGmbgHgQA1ibk3iPYIVXkBkXxqy6MMHZ9MQYUM79ZbW6d9n2_mBbem5uwkhkoDpEKlngwMpR1vGafREnCz3_6bHzo07w3IWMLsVEqJn5GVbgrYC2MWpl_eVnDnAydpozqTn2yrAqNT7P_EIyAaVfE.bWHCvBl9Wnm3GU9TpUyrGJonEhq0XLlkOE_w2dlfeyQlGQ.dQrwdfP4HqL8xmZ0NsgQ.vB7fOJHV_upExRjGKYoSvmbh.7XBkNM7UEjzVkj6oO5NfzpOwjpqOo4_kaNN5YRPydHGIOCwUFi0HjHIPNyO1g57DvKh6JgahpTqHHtxGrWddh7zeY4ERo5tQ3qV3yiKIZyDkV9XsGBrza3Ec3VtpKW6CH1P88Wp8VLw4HK783MDRaIp4QyfeKTufPzf4ZdV7d9QL6BvvgIXilKXp_x3eiYlfohQlG_Q2zhZWXe0SbYXqsm69PIJ1n_FiwMgEHTvG4GTkK5AMNVLqsLZrE37tvAY_ZnZQrMkAf3sq4ZIb6BYPXDc4Zr8VfCSp4GWBcWdlwygvvdYDkv8vK5Rv7RM0YZtBtc6PvMrB26BhTl8BFoJSrnIPr3y0me3D.R9NifVWSg8H6GIYnRaOH4tzCbdqggpYwV5spaMnLGOxFpxP6l5v4VoriFyEpDTlSj3clH3cNDzMvSM6m_MYXVHo5bXuUYJEGEET56sEv9k6PpqjPHdAS75mHemFw45KhQE2xzUsQ4E1mFYLpv8zgpzyynZFAXlAu0AJEWMACEVoxz7sTTLvYQCYY77Kot.dLkwJXXt8tb.ZXQQEMOshlRnIXeEC1OtLKRvykvAMHCyK7Ue_7hncSM_mUCjbsJGgoXgm7HJQtMYHGn.TRBiutuFArLbWFm0vKdJBSB4EyTv8Fo8iRod6hRl0lfEVD5gwqZeyyofJA3JfsAMoZhXNpSHzbiOF90SPvbur8z0Wtrl_CWC6TFYC8eBf4vHfZ2X3zT01caSiujT3E4u0MbS73Sl2sVZAPLtz6FSf.k9I2mUn9dp9RNODONrMyHQhe07YNKVdlVX691xSTmLcVUISmTgRR.gG.yfi7s50qw8afYvLpDRveFc8F18cKU7_ftEqhNaQkpw5NKcTCFwScz9ilXXmPrC1qAe0vn442j6Lb2VXcIoUXRzVzHdrBBM4vGiidPapbgH.QmjZAC1pHhozSh_VisTSpM4ZbA3RZW9l_3s4xEtyM1lnaGC0njmdu9QDEhaMI4GmkZ.remUVUQwjlgClPTYqOdlBlB1dS5LIGM2y2MKa8tMHTAXJjw8A6ToP9J1dmHMVatsaXcneLu013R12._lctxNt97FpabveWZWeiS_yIqn0DaKCoc161HrWDhb45lUMyjgdEi24WJu3xneGXKaMyHIcF6be9BajabAz5lWOAl7nJXhgubyy6w17_Bx1Xrvp8RwbZb_wdTf00jRCPDWIQkbNzG.EILZgi3g",mdrd: "nyJFkfQAsGr93JQAHYSQLGy8yenWTIOQioxJrKe1Ww8-1739100170-1.2.1.1-Lc3PJqvUoHbwVDxTa2MV5V22AGFo4R3QhCpWDqEj6uS__3cZeI1Oa9GzsEsUfEZ9K4B_SBEEjihEU20z_Le5WFcKYpoBcFv57.EMZ7lKU.QxKi6qm3jUpKNrc_wU5mO4lH6gwLdB4lAV5C5Xvke8xy4r9CaiFJKHZNX8N20ytKnXq5d6isO6KAQX7U3I0F9OVtSspU1HVKg7tNWfe412FiOj0fUDtIQo7XUH7zwsA1616zoV5cyoyDrL6oXd5iMpJiN2ppAkkyaIHJ5Jx8QHA4.SvrpfHB1fLsF4ET2M7RDlghSL4_UtBMBq1bTKFVnIJOYZ.laEks8MMFe4FX4jjFd12GRd2JTxbX4LMwIm3mKzFvu4CuCeXVwuHEjOQlRPeN0Sf.q0f98..y5wvZJqHXIYl9Gb_jfblJCUwsEWPStL_yyQ1Sjnb35KVUqaHgtAkUOHKjfuqtCcJCURAsSi.yJ9O.9liwMdDL_GqC7DBvWzk0IxDgP5cqU5ix4qF5hht4tHNp2yYUbff1sb2Kei6vaIec_r.49fiG0J3iYBDD2mxdQ_gpMX12p3HuDeUyNZTdibBq23t0BHf.I_p3diQYyJRefIoZc7VLNqenREkHB12q_eyFDfxGkIxWTt1j1Pn6R.O_v3Dq.ymxA6LL7NNrFJhfB.ZW7M8otn_MycOocHP9Zo.R8zuYQAp_MR9UKCaRnXtA1szUPPh2NeRSuEyofY7qnNylNVil.DhthjZEedrLS_GytkTurUg1QOIoFSKMYs6TZ0eqCNZypQ4hKOBKoi1qyBOSAr.gnlIbh0bmojsNWHplrNy9s9Ka68K_NN4sY5dBcg.cwJW5lnX0HIFIBEOAfHFXabbqUCq9txPv2pMqmfBAPZq_.yClxrhbanxiSp85lUJcqIgj2lwOqobGRUj5w6g8qrnXICGoCVVYepxR131gKJgaM3_.9ulfCC3RQWsR69TdJTFknqgIX8eSJ_A_1MyA3s9uRPzRCiK2TB4rMnghaMIPO3mkLjv3NEhmLGgJGjQ5rHFwHmwa7qCc47bAyvTShHzqpk_TbT2IFQ7IoUwRB9BCFQuTb79JkEYm3MMq5RYAOEdK_rVQ.NRpOZR6vDOW5.lKsTBTO8_LgpnKqlfFF8zFJx5Zkp0J8KCHjkFtvUTjjVcIGnxIkiUwpy9mo5__7SB0CbcQ5XNxOYALHcZzJkZtO2gXnFEtW.eoYVR.eda9PtPIShw4Ry_v.5pbXYqDuxA3p29e2y564zpfGh0ppXCFLC5iqQ3UEQc1v9kpvc1ZaGAlCA67boaZ4VSbnxEAQpcdoqfdmuyjcciULR_qNHkbyeyOqQbLDkQS3vDbXrKasr..tddcEHpJ5RwjfaUKZfLQSt.tBxwy7k5U1zrtWk3tbeqHRq3_Zolyzh4yN8QgBcclff8fuCZeYODbq.zACqNY4IQDZxkAllX7UBhEi5N0ONgaMGP8GCf9O.BBuUH6xpIJbCISs9mWpdtxwfBR5x53RNk5jvcn6EZ_cSCvT3wk4_8qPwnGwY4i3kLJJuNL4Jvyvq0YyEskxVinsioMvZraPFIkn2098BAUnL3.6RaC00SpZ0o1b5sizgL1bthb1T4wiVlaDppybJ1snSKjEoktoBRI1K_V62FxRIqmxPR0dBzL5jC1FaHzXP9PwJV7yczMPb5WJ2HNYat7giwwDEf169b1EHsM6JQmJciRwj2MSpapjgtK0S45cu6U60lRiFSWHg3it29xM2jeMEBhHSKBJ7PuGpm4Gud5pE_5qTm48NohAj9inH77Dlxn5_VNFfXutQIzD07UHd479r3VDPZXmjxJ0tg4g"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90f37be1abf3c9a3';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, "\/post\/4821306759?__cf_chl_rt_tk=TzsHC_x6pDoWKMexN5yzRRE4t29wdYC93NwAJXHQg8s-1739100170-1.0.1.1-3zmIg6He3BXdkGfn33o3fWAc4DYlLQG0j9XD8j6uaLs" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>
Copyright © 2002-9 Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda