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/sshmcpvrfjrh/

  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: '9308fb622a4e57c7',cH: 'Kzm0A7Lq82W0tB806UkShteb9zWfe7eZ4FzUwvCt7qo-1744694303-1.2.1.1-hqNSyyL9mGltIl0IM3yWe4NqInM.Z_LGdlCuZKbC2sezN3fWFmNtM7Bb9rXRvP1W',cUPMDTk: "\/u\/sshmcpvrfjrh\/?__cf_chl_tk=vpzIk3Io8PuLsLRa1bnnf1pTT3gw1ldXn8HFsG5ea9Y-1744694303-1.0.1.1-G39Qga8iH7GEADH4VkmC1eXXJsV4M_h00CWuQVbIZUY",cFPWv: 'b',cITimeS: '1744694303',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "unsupported_browser_beacon",fa: "\/u\/sshmcpvrfjrh\/?__cf_chl_f_tk=vpzIk3Io8PuLsLRa1bnnf1pTT3gw1ldXn8HFsG5ea9Y-1744694303-1.0.1.1-G39Qga8iH7GEADH4VkmC1eXXJsV4M_h00CWuQVbIZUY",md: "JXoLTVc6nYh6TK.nK46eQ22mcibUoLmrGxX.8tFh7FU-1744694303-1.2.1.1-HMoVRPKLlru8ulG.ZQaEhrY_iWSpqhe49kWWXip_X1IfxxU3uS.AnvsGyQRmHnocvq5NkbtcNxxai1TPkT4hr94IcJDXvvjBrU6xT9gfjYEBlKZuClsFhnM1mrFoL16yEiT6qabHw.KMN2Nt6jhwqQQgJimVxexAAPGMcmP2LO6kjf8IfJi506dzxh0Zm_Pg9oc8jozFPd7m0UZflxsZoLqonZGI_56LJ5UruU6Oh2u6Xa2mj9gCMhCrKf._rKvJzLBZtBojvGUzZvQhWpIrhKPAJYBhyzVv._RPgQbN8ei8vjq2ggToQGIbFjzYVQxLqdSlTWtKjbgbE1kD3Y9tNbJzZoavbOXISJen4OLkaQ7_sYb7XPbEZjnyKciPJQe2zIFfrbsz5M5eQZeiTzidu4WJzy0K3CQT0EviYpfQOqTSau0h.17G3L7uVkSCPdDANZiO8g.2XE2dHPmsbasQgA24widIEKBhK1mR9.OErC4KQSDNHcSeflz3ZtPdtN618X4k5ZGr.uJtarvG2gbuPVy7WvzIj0RIHaU.CylB8L3VYTkkQsYLzjsHkqN.KbSoccl9iXFbZLNv1I.SfwZx2ABVCNAdknhyDTxLi4LnmCLIBqjAFB0PzrLLomh3wYQekugFFsoHfQokkHbBtjDGzF3nZtYYP.GQPzy2sUfXj7QrJ8WbWqYRLIG4UV9vua11KJS0m99WbG9Tal4iLm8nf0Lnsg42tkN32tV8502ilTk2KfbHqx8QL2m6NjL.ZAF0OPIkGldxI3f9oUaVQtH3j59X4CLobrVnf4BigK7nURUMJPg1YkPeXfUKQtrc1lQgDjIWXf2Z6IqF219aSinJP2gkWXLv.v6vRvE1OVXCXQXOQnk.J_GDbPOuiDXrqHSZiVJQbjweKWqIODMi4A_aA5AzvbTrEMqogP5t2Hp.bpri4zYJjACQ0jH_.MIvAE7dih3Ncz8Lr6C.jNFR21bRfBCBAH70oaBDAtEZEdJsCB8ACXqQOfphgfeWKI.D5Vxmi1ErmC6OVsAdr5o4lGlqJw",mdrd: "LEcggBgXFrnBLFTgA6nC1NAcJsssmLBqDjmNg8LjqvA-1744694303-1.2.1.1-hCtoeNcMh2VWkDOTaN_n8YxuPBze.wMrRVexHstAsa3KeilPV2q6JBDJSu_Lu_he_d57O7Bqg12VTwGfcFl68G5f.fgiruIjcVhyi3xrK.umIFra5o6xch0eE28SD06Y5X7zpQFRfTmCD4D6ukwSC_JBwRHeRTqdeyvR7LUEjfdQJH0OU1.v_mslQkCwUCcBou7pcsKN5DeobxZWdPi33TYWPj5Piddq2GfOt9HtNl09dryEmqBDt0UWGnS2FN.RlGo2Nk6W7gtZ_f9hmcbDcjLswdL92vBwPhVIwrjbO_p_u26vmUxp6yWzfReoaEldxSsYCCpgmBEFKem..nScW80QfId328hD5SY03dl.mx5pfe5FngWOOOFA3vGY7EFXLJTDkL2ABuaaBWU5zT8n7B6aV._Y3fpnnxgNCWOJwfFJOjgda3NlZKFuAGLQS_YyipUDO8noF1kLy.A8Cryc19t5z8Z9jWcs7pnoEeu9KsSrKuih04FtjiQ4s3nDHx_PgsgoKKKOISzHnRK1PdAEFrZ.eyK.l8AnC683olRg1vhYrG9rb4KJYxeBxS1Wyv2.5Lsj5Ut2icCYaWROPwWxod28teV43lH8w1I8Ow6YmYlBeJi.53sWa1t8NBcFG7v2yE2srnX3D7YKI4vI4_X7FFl8UhAwAoxP2sN0LL1L7HwL3PzXnb1wZEoct46whYZoPgs5_GLDSJzWljjFVBDUb0Cq1WjWrAXGRt8p4AvEh6gK4VoRDE19FI.KD3vz3eqm8qOBJfrqp6FBQzyF5zKYaaP7hqIKWurxMhQUaM1.qBfpLxZ6WF3wdtZP8mQIhR26OGJxGeGyy0PrMIu7JdkYHhTuZ..uzAurGeamGYg0sR7ZpS.ZYUHrTR4nesLkVGJCgEaOs_j0nkNzNvMMdBn7Etfr4_g5Zwt0XKisSblfaT4fR4oqKbqHiI0LdnZrMxvsdZFjsREwd0exdwXe6mHgBsPF9fwLqpM0TsJjbSdHz6UaC02bsQhN9Hyw4LttSB5CCN0hL8wmLgK1ODuHCU0nbango0M9nzkv6INFDIUVTrp73bP1wijZgsw0qgZWlE0uRju5atagCPiXMv569CtOu0psrCk9K7sum5nRH295oK.rv2TyieyfGPY9LMcffxF0PH28iJ5cLAHBzhDuSKFNkHKlVMRTizCVoiyOwg1c0aQhmBwWo2XMnp3BNVEtdEZcNT9ND4YZ1aJQBRsQBUIeHoFIfyGurfK7I.jhgxfec5ZPUMtnA9DEwvvciyIR3wCGuOqo4mlnz.3COkecbIoPJTA7.O36itYMKHCkk0eZ5fcEIgKnoxQEdvANRI3keIgm3PD5t2saRZAFsWrro5THs5ltOFiTMjHkKaZEZbYjZIj0m84kwiUJ4KIbUwgF0FdNeAu6cqGzfXSg2yeJ1HqGa7azZg.QC0xDbC7vwUgd4rBN1FCooIphLeNnGhx7Bc_og0kba36yntXcbSdsVGU0tX0hbd8dwR.1hM0QBS6cbJYJd79yvMFaGDqe5z0rGKTVtu0IQJ4dc7XvQMugYipuqNDPQTdG2AdYoblYH8VbkKuACp0hZa7mjgCxvbAeQDTWfPi019IVavfk9uiBkMXONWJAqGhfxVkQsse7cffeSERM1goYAWHTS1x.1Hi65V8zKUIxybxeXY774GZW4fQq.TOd3CEohzJN428HEQ.UeJ3dmUBFxtJwhmAKIFD3HPm2p2d8KqOaIkVuSHOunSrLmZUETTYHS3qmWqxUfwCXlX.Kjx.CsIin_QyKkKMkt3ASn.qPXtY1l1VNPmAQMXQ2_RBmhpDWp4viYiohNaWJlJY"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9308fb622a4e57c7';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\/sshmcpvrfjrh\/?__cf_chl_rt_tk=vpzIk3Io8PuLsLRa1bnnf1pTT3gw1ldXn8HFsG5ea9Y-1744694303-1.0.1.1-G39Qga8iH7GEADH4VkmC1eXXJsV4M_h00CWuQVbIZUY" + 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