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-afflfa5c1.mit-edu.top/post/7986105432

  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,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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="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-afflfa5c1.mit-edu.top",cType: 'managed',cRay: '90f37152da142d05',cH: 'YpFnUBXwINlqv337l8KxT5SrC6T5apx3K8lHhTRs3r0-1739099738-1.2.1.1-8BcyBFCr8JiFS22rWxTRGJTI00ZWWBUSbnEV3bvosnmf_dyqIpxw5Ss2AukN4p8N',cUPMDTk: "\/post\/7986105432?__cf_chl_tk=jHrDtfjzJEg0ZI9TGo4LDv2gqE5_M7dDrUkfQncl.a8-1739099738-1.0.1.1-Qa2refpVHFT9jMSSErXwCnxOFXeEd.D0i9PI8StSEtg",cFPWv: 'g',cITimeS: '1739099738',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/7986105432?__cf_chl_f_tk=jHrDtfjzJEg0ZI9TGo4LDv2gqE5_M7dDrUkfQncl.a8-1739099738-1.0.1.1-Qa2refpVHFT9jMSSErXwCnxOFXeEd.D0i9PI8StSEtg",md: "RQbB.vzji69jROcrc.459srFgPd5oj4EfGawfso_bdw-1739099738-1.2.1.1-rQYBw.bfb94XRW21su4UaY0SUzjxq7P0w6TMEwnFFd_rtwrDB_YWi53C5y1Ij1fljYVcamqMflhIFUQAehOBcKEetAD_1uHI9.Rt6PB4zTnfUQrO8b4QYbj0sNCsHMz9E9wQneZQxu.Gp5HUwh7B.zkevsJjkf6xWvWZ6cBMR9GUnKzJnQUP_IrZkdYLMHk4zisbYJHeUc7xEbfD3Hksh0siGpSQSc2vXBmiawwkrd_9bPJHqfE3Hwo8OQnOXut8B79tnOMQ8IwEgpFTe1Ny_SI5XxAS3rk3J1P7BX4Ybzaq.7MalvZhFVi4W.CuulvLapSNJtn8xg5YvYDctnxm524_OdqlKZcRZWWu.U3D59gIMcBaJcl10iH4MnAB2qWOoL8fNKzQXGfXmrfXwHsto_01e_4M.NiED12XllAewDrOYZ7TnP0sL5ee5q5dt38MihV.79fChYMG7KoN7zYW19I2KWeSqQxueXEQpUT9DcbkPz37erN3J2VU10K5vPrs8.3VqGBLZ8QYELlz9T_Agj7KOld25s6g8c3xa0_aKmjdeF7M2J3dYI0LujfRtKfNLoYFRS12XIH4d7Ps4LxUmr2D8fm0bAxJkPYiDkBO_Yxd8XAdl_81yLV8eZJ3Qjc3FDuByfCaRNBvbsmnTU6XFB25MuttGP4qcPGU8oWrWGnRpczQ1KI.mwo_ZnA0IfaEsc1hC5J92TWtRjeLXvjvcfo_nehcVBIFvUBCoUk2b3rruFWKLxqNhPPOLO_QyeMwfNexnxuCBgNXhbWaRMof1veyRl2tpdKB2HT3OR_aPIZ4VMYItOCA0Q3okbHTL3CWFSu5DmvTutgyLDjz8Kg_f0sove_T7ROV_XY0yckXEmOlCNT.0U44ePQ8jRtuihMK0tY8yOcZAyytm7b4Q9HvAzFJipy4TeW1tkijhJ61bHOXMQh5PNuoGD2qQ.WLTj_u964oenvT_EkQru01NEsjHxUIQ7DuMal9iZ.09Qz7UNTw4RaV65KafAVaP_yC1vsUjvQW1v7zGpVkTvf8jWrWUsDbp.hPEC.8_AudMgK59GsJLDOxvPBSQxk5APzvqZOv2xsPe4zHl20EWjC3Wn8djrVn6TWE9Ypul.D9b9q2yK_svKeatXGfPie2LwIIAXkVgggszpUonbQ4O_Diquq8NpwskJa6O8gdom0aJu6GYibHmFo.U73F5eO5H18N6bf2dz1OZX8uvEgbEhJ3IyPKhIOKkCa4Ae8I7ieZCP3W6BPmgGf7_8HZ8eKdJJ.hl0S2WU9BeWWWvZdDE9TC33XZ1iuPck3fnpIUzy0d_VrmN8UCc6G1LdJMwrb58UNxiwC0VCC6AvuovhYnc.In97VxZU3oKjdbFlNQMbpnlZ_Tn76ijXpXVzYgiw_CVp02hAFG6p9zp738AsHIoy5CiiXJBuSu4k0_V6.KaqpXE5OmBuIhd.0JoXpeaVrdKiz6y60n0gWWQ.VIj2_MQbyqhR5ihFX0OmSruUq883aFMBTwENFQ0T1IqrrzNqjKY7j0rShl.BzzFj03IHFTBrkug9g3c0uW5RFvhp5.4bAm1mypn1tZ_ydZ9y_jZ9dMGWovZlJfSbzaPmw9vfZm3qiMC7sdOOnqmhAGT0erjP33IebCQzGAq3TkndS8WoqB5jI6lIr8GXFYrdRayxPNKU.MYggDhd4ev_exBN9nvB18JKiVQynUbGreu8kRRjGo26uX74UlmTlJvOK.RbaNg2wEDYRgPleS9BTkzKY5tyzAiQ26HQyGcHnrQADykrMG2C3a50ceQDXM7oKdpGUrGpSQbBQvLgDssmfVfn3ph9mQrqi8tPTP9sqZfBFl.rMJi4nT6_D3OHJ8JrJ3KyBw08Z7y3Z.xHRDt4.TWX8cuW4sogYWB9fwYMyx0kyRRvc6h4xDNQglHFvIz9d3Z.KRVTtW.1Xe5_cx0WYydhbn6x8klFoGN4.FrzpPp225VD6E4tfvo_tATBMTHCgABv4yzK9hKlxZTDJrwd6YDaAXgEMchHGvNQyUvNW7icaZ_Z4FEz2Tt0Is2j8Ghvo_ebOaulueujOC_EAebRQqu3ZrXalnatYzy2y1YAJ2A2dtEmvkdgRtDmXHcbpM0pRQPIyFqJdwVRroKcBKw4DL3CUK_Ysf26eO6EB7CPbJtvdJlrKakKvN0HBdA9NdtIM1Ns3BrVBF4vDCqhaLxM3OI1XkamWi2mS8nMfjYDAaTtLuvLhkv_.uKPiQ",mdrd: "6FAPkFEAKneYn31baWNegIV3p7wcqcTXYNm6gTMdQUA-1739099738-1.2.1.1-n29JvTa8XcRC2liH25WyNybri4KAogiSQLomAJtHSXcVX8KioFDFt7BT00c6AgnGk6KmE2NG14XNn6dXYSFCEPcDP3yJ1Wr4tWRcK2kDa57l2x8hyUJYVFuKsFe0Z91t0AsKOuIljjeQH9zyyR2HRczNVqYzRXU4DTb3kRbff_Jiyzt5qc9J4JjHFolAwT2gZ6YWnxINFhi.oToftQKgC.T9t8m4e58Q5m5rrBfLgQuj6hwwqhwD54y6MOcUMHQWmDdFJqVqER6KXGPfCM8njc1637vMfcBcUXZzYPJ1Yc_3.oT_YnTjHG3xpCw242otJMwEGeeF1S.1ZMCA0p8Bfxp3avgby85Q0HSCR2EsWGn8YjgDO_IJW.9eYsXVxE08AEja0hNNl5g..SQu6P1WwXFY__Np47b64HB2dBh1jfs9m4D4ijVCHjeyJy005EkGNaNaI5JD3B3rC8WmHYGzh6xzK2VPV.tm925M1RUuXml8arKNjI9B33tMSpHR7eHeYmfxjKyGPRBzRtbC3ny6c26zk1ijDErVu0B0eYHD1woZPFqpQkju63Xo4sTb8ARHKBnhYdX_6tvX4jvu5agQA.HhTEHL4UvbVZFyihw7RQ85H4lFA0QBRZrYX1c6T.6ACdU.qEHtBk7FE.v2jNP_HaMRNGx8KkGvsK0Ccb5Ht8amokOKpNKD9t3nHfYwFn3MjkRvTjIjZ7AflCTCujjs7K4ke9cW42tPNsByy25MjM3Cec_nTCCEs3VB4zJETH9eVz_6BTG_iTqAva0O5LpLyt0eVQNePN9GXwwqRzQWuln38s.dy.27O039DNZAThZLnEc.zwMsz3SNOX9ZslgTFitkpriZJ01sYDDu7Hg3G.DqfjP8VEAqXFzmtKl4L8nQku3lO3rdw3cDnEiJJODWpB48YOp_eb53Yd0wg7LANtkCa4bUItoRNEmu5ygE4KlUIdvI55FLKlACK0EOV0lNHqTcbwtd.WNq06oGHc.tKbKuVpTOAk9hUqGKw2lVDixpZNK5D9SI.v41vepk9VPZFZE1tUIj89qzVhXS9PtKEZbHwdaiDD08s6.91atvtQttDrExEWYPikcvFTaHPpPEx05bv70VAyh23ylFm6ZzRLLp3IgcrdvYMG7BmurZh_GYviKSyUgyY0HjhqCaPABmsZ95Vt7FUW5HF0Qc1wNVjMHkUsKsBdGFSoySgUSlJF.vXozyttZI5UKzM.yDd0JpB13bFE2hAZkJLWDhwE07.JH65x3bxIrhvmpJ5BMMuJCTkj5eCxssqmF91GgbAUxcFqz5r7jSyzhxUMdcrcA0vCUDriH2Mbvzaee5xGUy2btCX_ssmgi.GfH9C7qbTJlt2m_ZXzcOcIGSfFGAOPsHSKyhTS8OfhNPiEJMOKYh3vyFAD76vpTHp3um2PBb0vtK2lGEAWUH2TKKOASWYZCFuJLcT3No5Dg0n4okLUQlppiqOuJoWkjl0Bh.NpSMVa7rJm7d2m2CuvSiWXeXfd6TnXCfgd6yOwFiUQBi5s1b_5YzObtpTPlnVSPU2xXh2pYqAlTbJ1hujERPosm.TDxV7nVa7mgt72S0q331XtWgSeYQkvJgeVhdjlGqQeCeZT.2jjpfaiREZahnjFVTKmFbrynFhoXeUdUnbzKsthJhlY5P0mu3vSJ1f5GZsNqJIWyN_URQsCaRp663Wo_MW6Y.YTR0Kf_uNj9i7lMw86qsOvb8F6_HV9N8XOH3gDqavhkKJTe._pTsypbd.NgO3XCdltndC_sOjAkY.HbFVYWKQ6La8KuYoYXZb2NSx4Db540Srg"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90f37152da142d05';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\/7986105432?__cf_chl_rt_tk=jHrDtfjzJEg0ZI9TGo4LDv2gqE5_M7dDrUkfQncl.a8-1739099738-1.0.1.1-Qa2refpVHFT9jMSSErXwCnxOFXeEd.D0i9PI8StSEtg" + 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