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://ctf9tc.mit-edu.top/post/7286419350

  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: "ctf9tc.mit-edu.top",cType: 'managed',cRay: '90f36e48aa9bd6f4',cH: 'TkNwvq4fTxPKsEEPsKMJSZKiFaRJEA5x9trlL_KqC3s-1739099613-1.2.1.1-_52guM39ygMrh3ntxUKzLCH8pRvyFNlW4tqd9eh1gD8e0V7b_jmEs5pfMmgKTJm2',cUPMDTk: "\/post\/7286419350?__cf_chl_tk=qfbzEdxOHjF5uPfNfw0El3AgDxO9cpnuZeZkr5FboFA-1739099613-1.0.1.1-aE7HlrHnj2qHGu5rliXGFZsYEdMrWUmw_lXQJxIvUYw",cFPWv: 'g',cITimeS: '1739099613',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/7286419350?__cf_chl_f_tk=qfbzEdxOHjF5uPfNfw0El3AgDxO9cpnuZeZkr5FboFA-1739099613-1.0.1.1-aE7HlrHnj2qHGu5rliXGFZsYEdMrWUmw_lXQJxIvUYw",md: "N7YmxsvMsjpk7DsC6.WaXlRP.AU1l1eSmH6teWotLHg-1739099613-1.2.1.1-rAMt6Wrb1QPW85KLIexcuR1Jkdi2O4mUpcfKTvaDpQXASNS4xezQrqF62.8yCfVKbigSxBO_CB_MO9R0FqHK1Ajo.EQyw2W4fYWlgaCwz.Bsoa9LOsex_tTIUBDvpsQHxHRDPbQ.Zch0gMI.YBCOtD1DifzWXM.zHt6g9K73bco673W6YS1BVGzNrdSPPabqcp4a48ji5wvXIf3qTKqy5oSJDDgbRotvsWkor_56czHoCozDEyREFP8.HqptdhaEXZz5EldZoEHRn9qccLymqHKDXL7o._rqIwCJ6a.wIrndpRdf6NG0cj2.4DXRLtEDZgj.HGBbB6zvqCD6.gOxzg4qaW_noHETSSRlyMWKoktHzU_zHiziTSSJVsSI1F5AW9oIj.Z1m6rVDMu0s5lSb_QUV8EI96VvK_MCSxirtwSxapkN49aKrtDWWpTWWBhIf6lEKb_2eZf9nCNSrW2qZSjbHf3cllGZukVdm2UjrQSMn6DSNUDvggmfL1xuuCMmVmrcu3Ndk_wzfInhzLi78VUYLE.FSyPRMV.qBMXnV_d6CTyPoQXMmyeehDWgUCgavYyf1kwxidzCOlgK1cwdMcTg.fky4o25YTNB2vWi0T.Dp37UrETLXaKo1Z9ywLnA8u7.bdIT_QyYM3fW7iHS.YtG53p45dZndYAEVQ9bbkxlFoCfUyZNtgdP6TZhjBUb4dNijAdZguYFgL250a_JigTQFTXQu1FOuFog69aFPeQ6uP4v4N3n5dVNkD9tTs4RBB_T9Fyn77qj063IP1oDuZKbP1mQSeA_SI4xGkhQRcUlIuJ0Dl1.rWVyGGaIyT6SGbJA.p.r..GwrfJCzRfeyvOHnY1MHCeaEkI30TGCb9C0D8lIv9wn7hCgPgdHWZ0M6HgCUd2.c7_DJLVJeVMgswPpFlmSeDiKVVSgvDMdh2r3AVWRWDh5Aa8vdLBKsvwun7GsJuot4NzmqIXeWon3Af3Hi_D9Yf0e8PnkYZmwGOg8U9kfNYKD04SXA4PBkEONdiV7ra7rpGq01dJfaUxRmMgHibk6R7unjSW9Ln778VVVm7f9uburSRgtYLw60qKumRJJpkKuYuMFcNZm6eLR.OqDjo7V7Dz3IctBK0J0Z6CAAIm2QIw1bV182SlqOQw05UCnmOa0me_M9SmZI1JjBU2bcSu4.Z_jkC.fIi.1JAFt7T_NCD8dG4JvVEIarlfy4aP3i.oQpnEUsg2tCtipm6YjeW3LCJJ2jfoaOwzpnUlnOG_Ufa72BohrISgDlena6DSwzaeMEXHIuhD_SYXP8nQJG5eBG7hbG.d13pt96VC6cpEmp8w.bCYUSg3tWVZdXQPa464Wf4UTQced2AVLSYKXJn3YkVyqHEodp2TLo2rCIQ42S29sWWRYPuM4kiZRIWVe2b1_fq5SRUn06FdjDqQEmjJbp4uoZ5xZz6fOCO5EWA03ovbtpeI2ACSH8f.OQryTTjwIc81fNxOl.DEoNcoywtYSR4bZM0_XZtqY.9OltkHNcQDmKMzZJXKb9.dcykwR_DBQHVdwLc1pgvzYQd5u0xD09eGY4W4PRpapZ3OR5LUo.bx1XbHGsW4SrOvMvaCP5gobtqDGqXQbt5CYOa7eKdzc5iHllLOi8Yt2qG_r0ezz2Th8np8S7fjIbixvEexzjBO6UL8twJQTBYheUhVydlWElUpFt97bbGftgGrPROKBdoQBvdPsbPDxZb.Az_G6Z_Wfq0x2OW3z3CkUdZxO_ijwSik_NGgozDK4MloHRAJ8a9CHCW8_EfOLzBcw_VbEhq66PO.pUnd2t7FkYYJYEtpyThNjFgcSPg15ANw8iB5HWVG1ptrY2e5_YCg0s0FA5vR_VjbbYLmkULM7VqhHSJVZ5efKVhY4tZrdFO65zhdOlmJqhwmBUXB1fqmSSnLkUDPuZivkckjpdwjbJIznEtglIhft21lQauQOQhNXCqg1KSXBOBdghFalIuf.UsMl9WXfZ63ppLYqAm0VNPf_CIPXVO54YGI.PWYFlsanb.SYELHL2qJo9OPdMIzckFneYUDgGGV_bUzCN3tJWJPsh5ZnMIWO3dQdS_ZAgQSnrOH3_9NTS58N.d1hF_VrwrWVkNwAXiV7wgXpNpbnsnQVmUM1qB7K1N2qP4zg7oDi09COMUtjaUFbe8KfxQl1ybeN9MFjuomV.BLb8amsxNw5WqKsuwZModMRj9mnrpM",mdrd: "hEezVb_CyRnG7CkHsbX6_SwShsCzrmFPCbtbf3yvtTo-1739099613-1.2.1.1-7Kr5T8afYTcjD6WpCLwG07NJgGEWE_o.pP9Uk.IYdKCQJbWmXxCbJjCw9pJSAzkurjonKG6RI8P8LFR5zudaNl4oF9_LbV7WFpbHirQr8Aag97ReU6drhggzkrx4t2_DDWdNCr0LwBRkn0eApETpzRPD7TuBq.WsZLXhi5E3Ye81Nn.pHjLfJ.0a5eUo0DxYzHLufP_gSuWRFlEvtgnWBxakmuN7G.7SS6UpG2JRKy1XxARXsndbBspi4OrMX9OPv9VXBELkIlzAmVLmy_bD24sorVv6VgOS5AODRGLYruhXqfJLqUzNq_WB_eUzUv9CkD8XRoZ7g1Li3l0bOeLhi0iBdANitKnn07D.Wde1mrggcmYHadId8kuhX.dmyGqAC6frrVeRBBQD0xz4_3GOBeBDKC9Oruj.IhfhIYRrLjaWBaBEK7Ciy_jPUm5recNeeRrt7loBVqf5FMifB9BNtRLqU1QruxT70PfV5hSeSKyqQ8TQoowy0Nxnzoz_wMUraigvHNXnBcs0Z.b3f96I78ZgYyBSXGCCgv26Grbo4R2OoJy7wqGn4tYV3w5wBLVv5uf.4tkaxTVJO1AzY0RFaPaRrCIymimTrFcSI7ak9ZyIlobgER_LF8DLFktBfFjPNYfkn_FQcwVpqmyggqzEKhNutHc_T5wVW6XDSVm2BNFLw7_1YL6eXtB6igBrJEpRU9ffKb0l6nsto3z0oNge9SxmukgrI6Id40OxDVAXfhz7HVPHGwI6XolmO_v9WjJ2mCCHtXp0jro0L2cpDpdkScpjoQtlByAbriUHHyi2DW.S22zeR_IQ99X7siD99Yd1uj0Hu_9jemv7PXQeAcJ0.DEn71OTat58eAWKUmv7QBnTTZecQRs.K7Xcot5M0tFJYs8KqwoC_5DwewpUA_i2sKFK7sYbv3CpSEaOA0HrRlU1rbBjSDAYwBZMKHVBw3NOizxhC6Uz9kfXBykKK94q7jPxnnx9V6w8Tmb3AhQ1jtAWUt2Gyrbunk2SNAJSP3aVb4Dih4wqloJFzJz7HYHRk53h2Z9WfEbeSTkLgxxEiYhOpK5wmRZuhUzR.u8ggw9mylH5vyOGe2OkAo.wSwXoR5YAENYp8sCPQNPimIeJ9Q3Uydw7omqfE0tutQwS3xDV._gKMt3VpZIuExGRtDjGnK2Sd63EdCTKYPkJpFuoq4orV1jwvbUZbbaWHzZBGzgHWDWlAOIw8BcaJRvAkd6CTrj.WVPSdK6KA2o352g1E4_XdUV40xpRIpUljyf8Tgxn1SBWcsPx2dS_pED94yk8UxUzMtn9YhhdWNg4gMQDUSs7xFxMWLoXpJTWxNMqLxW9GtkNTMdcAHkA0jHOKrZmKD6VlyaCLkMsGdlmistdh7VoCheJ4XjPTdDNOXn5eP9cTF.CVpYPEHoD.P1byz0Kgxb8u_KXwGN2FaKPNAQWNdAMXrv5.cWV8vfOcXqJkctRiZaNMb3VJha8JD9KLLZ7920BzNzPxybvwUIMeYvLGbKstbT2TImuMvJFXZgeb7h1MbzAr9tIZE9Koe8sgsDCYc.2wCBhFSzLhy2TEemW6mUr3YJUmV7K8fiDJkYnATIplyX573NAJT2_4yXTlX1pZGgPvzmNLUHgCOZAZQ9wt19eJIoNxFIftv5AO90wJQcdVwGPtBL8S6AN3cFV44jrcd43_tOIBZvxgNQRJJLAtQORSbCENAuMeT2r4.DofTwpXziIVTkxCDt7kqFYeIxwkLC5l_vd_m_PWv5R8Qra9rsRWjPUa7lHI.wQRIk.lDS4"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90f36e48aa9bd6f4';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\/7286419350?__cf_chl_rt_tk=qfbzEdxOHjF5uPfNfw0El3AgDxO9cpnuZeZkr5FboFA-1739099613-1.0.1.1-aE7HlrHnj2qHGu5rliXGFZsYEdMrWUmw_lXQJxIvUYw" + 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