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/rhwuyopwgb/

  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><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: '93fdd80b7bb2d637',cH: 'rle84tYqjiUgRLWjNEIxtLinjmx0dShMyWUOvai6PwA-1747261866-1.2.1.1-beCA5EQ43YF8DkuHWlgMwbxOD_cQuUqZq8Ewof3gxltTty9eQ2HMPAk7Pvv2uTxO',cUPMDTk: "\/u\/rhwuyopwgb\/?__cf_chl_tk=4HRDZ.ISeC2aN9cq.OXtAWqdjaiUtaKzUG70M9rR3oI-1747261866-1.0.1.1-n_hTb.sU9whn0ucTAtlEzzfE4G1VVA46uBi8g2PFNhc",cFPWv: 'g',cITimeS: '1747261866',cTplC: 0,cTplV: 5,cTplB: 'cf',fa: "\/u\/rhwuyopwgb\/?__cf_chl_f_tk=4HRDZ.ISeC2aN9cq.OXtAWqdjaiUtaKzUG70M9rR3oI-1747261866-1.0.1.1-n_hTb.sU9whn0ucTAtlEzzfE4G1VVA46uBi8g2PFNhc",md: "V2PY8SmBY2G7SPl0PATjsNCqOsF9MUTMfx_zW3SeYIU-1747261866-1.2.1.1-1z3QlvbYKv6KKLPnlpRvs61GhK2Uhn2WfZ9jKEXxSkrgSbazW.h3YZmGXqcuWB.EjzVySdBV76WmH07kVFYSra7hA8vgdZ04LMcDkFFt.xVolOUMZU49GTjxbQJl9LGuebsbyrI2qskv36anY4iSUkAal9WAyV2qIu9viIbLmPJ1qnjK9FX3_rFoxN0oaijY5o_XkNjmD16LwrlrE40jsstVQ_v7z7gXFaud4wwVTy8g8FO1UupXnkC9uvpV3A5W6AJofeqtUQ9Qg8MjljARp9281D7vixbFDMC8450zgLSKNv2LGRX9fxFYpV4n0OjjF75O5a7Ek_VuCuen4cBm.dYWjhV5G715mkMkibJngc22qdUWMgVFkkunKmQ0DbaVaECiJC.jU4stBY8y3Sgq3Q4lj7XfVxaQkVMZ4wiRDthBxhhynCWsjAnkUaYWMkDw79xm9lrctfLd4imbHvhmt0aRqloudUCwcMXlW6LNmT5LGBGkKVVNukQEnEdaMOjzBJu5Q1VMOzQqiM2nsJP1UZdqYXlA8KVVUsaoT42vpYlfV6pIeAKV87xWVBUP4UDqrOdwTV19vyML1MrrERnhu_NWFoQ8TsNuuxj2iOtypW7UfdhsF_Gv6EZoArehYDwYC5dzJszbxKMK6Y6vpy.rJffkf747ERJ0y0N9GxTgsW8Uo7VM0WvA89fPO.i.X4nWNTpCu8_Njkpyxxc8ftEwV.jN46HpjI7g8A.wrsst3qFq1wZBCuzYzcR.tMxEQyUx1PocIGJaG9Vr7kw5vpu9eK_9dGsXDPBQqQapoW_d9eKdgAJ9mV4OdqiudWq8TbVTypNVdPLfgUUmlz4Jyn5f5NnNB0mQNfzgDmL3rYoGCJxWgW5YnQ_Z2sv2m9CoZSj.iPEm1ObcXOeWBNSzwNTRXLMizaf8QP784g9Rr7UFuDw",mdrd: "5nNMlu_9i.iLsMhPfd3MlTx5o065sYW5oAko91F2ZBU-1747261866-1.2.1.1-bILhWfYvk9a3xaFBvoQ2_lhLMJbdPvlxu9wQ4BwWYOQXD3.OBCV3xeuTi3FpFDQauYxYAmiEB8qFrIS3PYYzzfg4r39_NG0dJf3GAo4x5LZw5zpGHCG46AsxPmPll.gTzxvYX9wplmHo6ruqw6PRge4fILbvo7LMb0Ak2ySMHlAqC7oyC5rr9fXySj4IrMsvyzHCOY1LVl6zzHMJj7HnqBiYtoM3hOO0wFuxiRup6D3E7uVey5w6G_BbLJeFt1ZdYANJqz6XBdPOlgJn1CnSsVfv064fxoFyJ0K.bvPjZPRPm53nVW35sVu5ruMZ7l2PGORtjeKIZSejA8LdnvfZ.aNrmdSAcgJWqnZxjo_U2EkPSaNz7MAcAP6PUwilIwNEAU2XQtk0duCOKRyf7Z4CB3555U89dY0wpWZhR5un4q9wnN8.6j1uMZgs4ScFgr2QkhppWTHIqxuE8Ock1aU8htjinejVEHG.0j0R4N28Iq2DIF8B_jf89Ks2mymzZx5qncVV7ijdJ.rcIJZixdE50gKyAgQKZ.eF5D1welU2bL_02yKYhpf1iO1zOzEmNZ3flci.JIZrtG6Nlo9QkUKOlp1wkbJ0nzYcp1hRQ7LGd6rQrlwRRldoz0l0O3snJnVBMmh4y3rOc1XDsskN72IOVq.4PL2wKqsGjMytR4g8MGELuPtiXP0XTGQ1cUi0hyaRV7Ak.ZP4Jpf7MSiKrpc4Ig9RCQsFwe22whRoXOKEMTAU9s1u4IFCTfKj.4dFul2M5vfUCWdfcGyA4.rH.XR4ISdgaXQEwHBn1EFDCVuf0_di_b.71ncfyUx72_dhc8dYhzVKPoND5Lcxa0MURwGTg8qnyTis2RiWgnpwTpJkHefNYtm_gktq5mPh.L0.2MBw.GnVMbBhiK9tEM6sWZeXSRTxLXZJX5avN33IoRPBcsOhzvtaN6SDJvxxbVjYKX8Zw597ZYrr9TAxNXM7MGS1kZVJpKe9LqL7kLt.S_r5gmKYihQTQ6CsYRFwa70UquopQhpCAjqgxvT_czCxJ7rYUMsBhRnw_3AZRmsTgBYRbMTceH4EaXrJw0SRnhi5YKdsqSczgo03a0nQJSSfJQbv.YKS8VLx7ZLJeRQLmLZzJ1HEzJa62RIR1x8oCJTWwgYJfjOBp5G.kpMUMoUGPxdCbB5DEFSqMgtP5YIoNFg12P0pDj_M7JoM6Gwklg3.9VhvTsQ.UuzFnVviZcZbtEzoVTRdYV.YffMZ3TfU7ykHWwOdtZMeSPNmbPvRrfUAMD2m9TAgOWrIK5iTRAEGpbM67RZZSmL_AiN6TJihFtMcJ3M0b8R_MF2tTtfzrKomAjmoZj8gZEUHSKQ3QiUX112eXXSdnD4G_C3QcY9MZrp6Zg8VjWL.I2_dyy2Q9voWg0AP6VyPCnc4vlHIulhkzBd.9wOdupH12rT6LepaB8MOy2QWyigvOC9WZzsGPudCj13FkWjxLoNp6.G3iNx3WoNHVf_JS6yKJSyPWuy.D5UbeZR7L2n0RkKnwuC4LMOlTj2WH6KSlN2k9Zv67BhZXT9Nt_T8MA4augDH4pV5Dv6FGqmgIeR843MVHUW6AQ.uFfPzC9Kk4rufdbkdi5o_3NUE752FE7zRKYzSBHaFhYx2.dyg_9y0ydwaumKzeWmmMnRBz8wISD2w6WI4cxDHwiNixFq9EdwY.tUQDn9o8r9.PXewInSPSB8TI5jPoFWGxiAsPZPj4dyBNcP5.FfyeXXhxPe6j0MOZPnK2TaVMafgS5T4ThA2YsYtSliX7fb2dQm99fM_tKgDXSQfzS2cVxP464UtuDahi_qnDr74waQMslCv6q3MKs7je69wpFNE4D5_x0QVt.NYJgt4XD6koo.Xgw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=93fdd80b7bb2d637';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\/rhwuyopwgb\/?__cf_chl_rt_tk=4HRDZ.ISeC2aN9cq.OXtAWqdjaiUtaKzUG70M9rR3oI-1747261866-1.0.1.1-n_hTb.sU9whn0ucTAtlEzzfE4G1VVA46uBi8g2PFNhc" + 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