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://leetcode.com/u/kzzpldbxcxa/

  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="360"></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: "leetcode.com",cType: 'managed',cRay: '9308f065ef470736',cH: '66TkY3U_OcYc53NKfMQgNNEPRdONdQd_flE9KXiedn0-1744693853-1.2.1.1-8uItLVThZRmuerjlWBJoA9Smc8XYZB_jxXCGMBQn0deNbf2QgdLaUWERJvSsyWvT',cUPMDTk: "\/u\/kzzpldbxcxa\/?__cf_chl_tk=eVuuwI5DVHUiNYMKAoHyoH4kE0xYTwMz56HUi4vJ3L4-1744693853-1.0.1.1-eMudKvkCE4B32S4KPH6O9taITacLB2SxXaRK_J7t7xc",cFPWv: 'b',cITimeS: '1744693853',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "unsupported_browser_beacon",fa: "\/u\/kzzpldbxcxa\/?__cf_chl_f_tk=eVuuwI5DVHUiNYMKAoHyoH4kE0xYTwMz56HUi4vJ3L4-1744693853-1.0.1.1-eMudKvkCE4B32S4KPH6O9taITacLB2SxXaRK_J7t7xc",md: "hwWzoKUS6kUp80FuSiwwQWh5Cu8SmOEk_EeJH14VtAg-1744693853-1.2.1.1-1app_p4hrYUnZScoi5gZuF4wutvF4jWe13JsTiIZ0ZkJ7cnN5HYvjWZC5Dh4whrlcEu95D2Fcq3nx3MzzGrSE26mwAStpXeoR57MQbxNEIwd0tJ68db8zDdEgqq1CIJPgAhGqUmQ0BA7XP3rWVUpQDg2bfBIxgI6huXXr4VjNZv09DQBwWT0xl6sQST3SimwwnnBjwJH1V72qin..d3T0ldQUbm_uYeq1Ui52M9fKM7K.8tG_PaFcvvfrMdCVm3cJAtXTUyMCCDoU91_XYqQx_I03uhpdjhV19VFO_TrUy6b5uZkVJs_TlDq_mn2KGFpD9DJw70LYm2H351ITzd0C60N6tQ7zv7Esl3mLQWEoRjxNx6o06BSjDlewIN47pRDXTvKeS10QP7UuJKfSP40jAYflyxwC7ivkIq.1mVvcgMbls4ZNVCzT1W3J.QIbT7_lVHjn9acRISJV1B_PvF49oUFu6JC8XFD5QsdcabJBtluuhdZuzwrJSCO8QSUAFzhALLjVaElII2a4xUkv80Ew.i.JA.kBeKk0TjmrVsl25EvLccB_o8fnUcGHGNMqaMxvQsEfLhsdV_yZdQivYxImfu94jc_haJa9q8GRichLwrn5yzVtr4uXw01zHi8p7OcXh4PayWxgIJHwmq1.5ZF8Gju6HF2OEgU2gXXnJjOAOvKd.zrk6N0Z8lCQxtyrUiBrEV8Ng1MjX_cwgRJC1H3gBQLlBNFg98emTQckGeTHWG9LOLOu93a4ghL3w11HUIU6AJOX5lAl3uVJnXrtSPq3kLuxfhIJYyCJKNcOMfYnTn8d.j46Uu_NMR4c4OLSC5oKa.GNbt_6roLlDZ0e9d0jauWfK.DNUm8S9m95RUiTFjVj1deorQ2WPqIj_tYWVHVmCsNYJnN0K2GwtBwgY9Bd9oYfPPe4L1zqAhg6qt7eBAIjgzT_6f2OKV95I1zuI0VJci1_xF6hRB5if4yZwbSbK0dvkMhz8isbiP5gnzoN7RZI.LASBqKYOnmQ7rvZWaqOmf6D8uAc2Z4PiLSSvF20g",mdrd: "9y60rYLNkjubU69JGaZc.Us2CbVbzc3Z7wU5ZhkWHLE-1744693853-1.2.1.1-rJKEYpeu4QEr4mFDtNfUHcMNlL3qrGHgwla2r36gGIBLfm.D1nywWm5E2U1RwzAMCb2z82qZ872_RZgOC6h8kLhyXMeqt6tEjyY8YrsuMHn5gydAjUMJbDhrq6ZyPwhoMARg9l2H_SvqSt2X5dJFeZmYe9RfKUtDKjq_PAxcF.HaSPeXRePcnleLWRsiVJqp_FP6u_JLcfmFkapY1SQv0B8EsknEyqiX_K7Aaw.2B8qoZetIOnDbdu.J2Gt4eaaHqJWTuMFaCGEXi8CYniB7pyTLWSLgYmd8xTbj3L0pSgSs3ERiUw28lz974rbg1kMErgQwwRdoTMPM2ZBYFnQurvLDIH3GBSD5wRZpzAAcU19D32ycsL9y8X_P0X2Mdn9yRzyKAqwrFQAaUR61dFdYRG4Zx9WRX0JHowpAbmjimBOmlZR_2KmntqOb7QcQEg0BrerxG.r8C2xVn0wwTPOL57INZhF5HisrpN7Z5dl03AmmhpKzDyCqUot_ZwX_pjboFL9v8_5nT2N42nE2bTQeCfeOQQdrxtpPsrb1k1ayGhMeKE4ngl.nBdHa2WtwNQjyTz4mqdv4ZpjEhVHEISlMljPspKpEv_h0oNkQzHRouaQrKtMmur7xjo6j10soJMcWgctVLBJPXGcJyIqveXeXwtFTxX5CLuh9cw_c_MuvuIZk_MgLgIiboC2epN0I9rmDzBxtjmjNe7ujUrw930DR.HKEFaZ.Acj6yjwZWoTwCoZB766CrFcc72dmfsvIeNM7rrQYFcFeY6LvCpkXH.zgdVVesnL2l8aDdNsAA_LNrN4sCjdc.3cC2e7bXBNI48fDc45mCgnSNb_HlQX3ZgHo9OXmHyIQjerwMvq1shkBEdVUSgrYP5mTXAu_vr5fUsrejfOIkkplpYi74oEzMBY5ubeEj6h1rtCvCzOlYllYogzTRKnStgOprJTdPs4PRz_QzNg8KQc6djXRRTFmhfr_mLVyatVesT5.U5ML_gaXnzT7BObqP1oXWpfci.DMK3OR7z0XAnLtvn9hFRbflGPhKg8udXg_N.YeMGLKZqPdRnxjGME3QBYb6ZGbVtDvEX7JShByS4Zx4pDU8DYqAMWj8h1RSMXdOoVDEMRWRGdObWEuBm8gXKJwO1RKHOvZzuECXZ.2z_J5jn2vBPZv0bBC4k6n0NKOMUWaHBDWODTvCH.taG.hQ.FZLGDmj2gc_MMERWtYeS0PvZkQmztJ.2Z3d8lVAzMUwzX52BBse1VBIYtdrBk10.5JxX5NGDpi4r9YtlPkjIARZE6Is43DoBocic66QS9M.e9dz3smnPMsSlzn.FSqyIsU2t0SJA4cITHXeRHcKhiGHbNzdLn5UP8Qp5Sp7K0cJ4xtuVx9bf6xDmEG5ln2oExbzQFbmcMow_AphvtYox2X6opjLNBWTmzPJTQStAGkGj6pCkK0Ep7kxGcjccPZ18tfAJnAIyW.XUuzgmoryu9lGqhwYXbTNzC1RXZYD3rzPX8zTe4j9Of8kqGV5Mj2AEV9.JxKyrrRHWMQ2scDY3vghGqNUeM1N0t.e4EpdrJgbtXol27jUQllicW_2P6FbhWWh5wXC77XG5MBpziRdte9mYNnGPttjaug_bWWvjq5TFEH3gjZG9XhWjKNKuQoDqadxxn1lknasqy0S2qA0hd0pcg1vrnkEemDUxnwCTOSf4KGLx3AriIF8eHQJDu48GwrDiqC1I9VgmXPMofOsNeiLeycq3zlpKPNRjp4G7BpdekHDv3RQlprLF28qkT5MxzoWgD.coHAf3Wupi9jrzHpJkJmjIN4NYaUZpJUxqjDR8Eg5qLG2FAJCgGNiW40ZNBqYFR83STl8IubJCycdiH_zXkNqdqWLhUAcQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9308f065ef470736';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\/kzzpldbxcxa\/?__cf_chl_rt_tk=eVuuwI5DVHUiNYMKAoHyoH4kE0xYTwMz56HUi4vJ3L4-1744693853-1.0.1.1-eMudKvkCE4B32S4KPH6O9taITacLB2SxXaRK_J7t7xc" + 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