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/yuvqycrmmxqod/

  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: '93ac05d0cb68d69d',cH: 'NFoICMrDxBPb40C249hwbqyuG8CfE_cIbkcQh6ToKbA-1746403909-1.2.1.1-xG6sYE_MgM0x0MyF0G2eAD_DuLpett.KizLabRkwQkfvGPOCYYSyYDWA1xhYxe4M',cUPMDTk: "\/u\/yuvqycrmmxqod\/?__cf_chl_tk=Gkv4Noks41eILHuURnBq8.jYFGLXOGUR8K1cTYyevFI-1746403909-1.0.1.1-PTTois_rBIeoGtih22M1Ptr_XbXPZvhvZTUPQa5tXJw",cFPWv: 'g',cITimeS: '1746403909',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "unsupported_browser_beacon",fa: "\/u\/yuvqycrmmxqod\/?__cf_chl_f_tk=Gkv4Noks41eILHuURnBq8.jYFGLXOGUR8K1cTYyevFI-1746403909-1.0.1.1-PTTois_rBIeoGtih22M1Ptr_XbXPZvhvZTUPQa5tXJw",md: "nzqDEzz81sbK5j4AvGcLULff6MDHZwYArAho7VhRXmo-1746403909-1.2.1.1-ORU7aW_ESMYsOJEF2BJXvlcs2wJhgKMUCMgdcSm7aprIVv.WWsqARWH0AOd4VgQCLLhD2xDMqoi6_Yju6vaoKpoKYWNK7N2eaRCTgCWTfIHN_.aHxXQWZIS8WdUX14Swb9tuAqHD5uS5RjYGYtdohV3GlOGS.3.wNQ0YXqFie31MDyB7yzmYhK8qu4JFRwReyp0K.Lt_tcNl6yWl04T61CVQJ9NsbsQvVjyf19cv5liTOkKbQT.6A9YBjlK9.vDuvOntcL._kkE1g7wE_ta0.euNEfIPK5Eg5G.FReWrKwa_lCc6mnDKiH5amRpbyHEon62I6Km4dU6ZTMwJ7U4DmBt8iG4o9xTh1RYAfg3pxIvWQFMVksywyKOgpCQtMJfLfKuVFTBymJWHYj03TjPi8Y5vfgCLI4YUZzTpD5Lm6XQQSFWpMW10khnk0Nt_fH13psfbr0PgdheUdDi1UD2b19e.wQqw56ObgJ2A6VUqHB4khMKP1aSflPSJEeMuw91eN0qZS0l.m7pK5mgf90h3T31b7kD0PV86mt5jQgrU2F0TzvUujALNFbb8rdoTosPYYg_IkztkLNEtYsTs2ThGTcXjQ4zske_ZahezAWfx3s.CjEkGiWBKSq7KzaoVSqMCPGRZBavFNuqvbw882NPkvWD5pgzH8FJprcUAC0jjOQBZp3d6RBgEqZhix8A1Y5y6vjcJhvH92HlU9Wbg2RHFQ4aQ5HrpbPcKecLs5Tsi4iJQ3bai1MvNHK9spu2ltJYeZWrqyox94co0XI8puqkzbZV_WR3nxoA381SnLtNcQKSfjOm3w0yBKQYx0viMFPayBB6hBk2SskZvgY0QdAvDyE3dtJzfasMLreOvQsMPCZ02Y660CL3.5hwlqpbFO8BC9HK9mCBgQt_9n95Ht.jy3TWoUyZ7gU0rXD.eCi.8tO07zK7LSzqmjUDP5qZU4mmdZG4MrnqzBGqlxqvakFlmNWPJYvBxM_wXB0RzwR6jIMUbqWgstv2ApQ1KlXKPdLJC3NZYBgPJt0RHiiApX6u6iw",mdrd: "4lR6msLri83uy6gqsandJLRqkgluiXVOIJtRxF0.yVc-1746403909-1.2.1.1-38zp5HeA3wvGm4.74SfNhVYT8r8Ipy65s8PclsFQLobSml2e79.rjBbLBB3sqofvui6kcYH5ATWuBWC_CCtWIUfnmlnTmDhT7Chy6ebggTaDHNJjASriLBM9anvyn6VxTnyk9FUNOUXC50ZGB3FuEs18lIEgatJyByFiw8SjhYZjwY6UcvErPIZcmSaKwYjdqTD45HPsM0Y.mzfdhFB3VpXDlxnyjzIN5Buc7lNePeFmQvR_2WWSmHZ1LxRO7dwmerTPn9EvjnV2aUrYfX18JXUcL9j3_bDSz0RplWUwlIVVi1qx49qlL2CASEBSOeMA6HSZhGW20C6qHXpX3se5Mcn4YjgYLCtWddBx194WCdIipCC2wOhhaWASzk6Om7RPZLvp68vwRzoHsMErF7VSJJ8ImLsOht4StOq2vzmocpmH_i7OrJMxlh6MeipLrdl4Qwh0KBM7_wxENzlrwX1QuegybZwISFFIaVLPES1_Rcs8CwneM4m5X0rO3Y6UL8k6F0nyJoA137bE_0lJA6n3f1QFgTvEAkc5o2_lCr9NFzE8vqiSusMiAyU_4JgS.ujuXEmshIhqweYPEx_R4XxWEhlV7OZKOYZg4E5XRNbqhctwHbORHKZ6cM.SCFOPtJFwPMGfcN7rfWm7TEpkUkVbmWQDQYGYGBccbN1iLdFp4z5fz5LTereayj6_3ASzPt_OJCbWcob8PXz4eGgGl81YheCNJlcIVOLfBpjcNr9LMPiTrZ8N.KTjIZxlX_E8RiNpLAbcM42doR.cC.8t2x1QNCZqDeNslR.C25fghEZ3SV0D8IsAs2kt7HQXZ1_mKDPDjIzzVcn2I2z8PCxItLmaosjDDUnis7bGcSumtR8.8kZiWLAT1LRA2S.bf_aKmOl.YUMxLCvZo40Bc4Y_YZDoBetL5NB70d7rGzZQzz1bFnskQAxPWipfSx0avpHu7NI_VcgXhzbDre_tSvLK5JN.p4LlztjIGKCKe_oOOP00MtVN_f_JCSU7JH5wBAw.Bsz4EU4rJsmzIuLcZHN7JFI8bixm8o62cgrCWwCqNkLouhSayOr5MHU5V2HcSrvZbcTfih.HXfYQKv3ohFTeWvY8n7Yd9hmI6HQl8HcwABbNfL5BEZBw7fEGUjMMk4jwCkh3aSPfuAGhAJwjJvrjoxlKe2nvcGMTKD6C4Qk7lD7WV7o8J5zGadXTN_ANbrAXUjxXmNQZyL1_W3JOLwgkO77JmNbuWLVM4c3qJ5ST_uc4F520wxkAI8.hsqjR_9sd7zPuH1OvINiZWxg1sEZc5cqr7Vo2d0EDiJ7uLcqnMrUiaiqLwNDffbHH5r_bWYOw34St1v2gCk9yoNxOAHCrDbBUFQvbXja6n3CYcz7ndIizi_ZLKI21d2BO8F5hqPM3lKMskuqJNGWOgPz4zlVy5YQhtvRRLLvdHqQWgzDbhvtsa.YX3bTe2FkErHc.alnCdDcUQaWzugQqXLiUxRV_dkjv68Pga.z_U1yWMiIKqBaG9vFDeWdT7BOIPr.9aPAQvA04eQ5tCyNyCIduLjwA9ahiYn.SQJOTlZH1anjQcyeav8ss.Ubk90PWMCR1rGXkmOYprj4q9yabQx3iMKySOzZVzwcFRQuy2Ob0uHQDWZv7VYSfktAZ50HDc.cVSBfDx6VgglMbehe1tDah0HpVP023Y2rNvq7oBv4z6jPaMpx.L0jhb.led1TFxIdfhzAVX_dh_EQ6B0J93BDJc5sk0zWY4Z7X8pZPKdLtqQkzoqJPflHWdbpoNJx8e3dp0j_i_.lHs5xO3XDlFa3c0PUe5ticCHc1zUBGuPkwC558uScLJF20z0V49U10WUbXf04sCjJX3zICIrGTzQnedROD0W2JUQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=93ac05d0cb68d69d';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\/yuvqycrmmxqod\/?__cf_chl_rt_tk=Gkv4Noks41eILHuURnBq8.jYFGLXOGUR8K1cTYyevFI-1746403909-1.0.1.1-PTTois_rBIeoGtih22M1Ptr_XbXPZvhvZTUPQa5tXJw" + 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