for Atom and RSS and KML
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.
<!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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);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: '940013c82f4f4e70',cH: 'h93fGKZ9e9AW8nGIfez4IN.LXXb1qXlvXqyHEEAEcEs-1747285285-1.2.1.1-UEqDmBwjU1N0m2NA4nX14VALuB9JDT1OQ6PLhLUTxN9AFBitI7joaSxW8bxcYBCn',cUPMDTk: "\/u\/ttvfjfxfkji\/?__cf_chl_tk=3h.TYHr0_cdTZnwB_VNUIDMmjEbbYYe8hkdeWYw5kA4-1747285285-1.0.1.1-JG6s1MfuRUTRcmztG1bTqbOlBWvHx8x1v5.clYpMvME",cFPWv: 'g',cITimeS: '1747285285',cTplC: 0,cTplV: 5,cTplB: 'cf',fa: "\/u\/ttvfjfxfkji\/?__cf_chl_f_tk=3h.TYHr0_cdTZnwB_VNUIDMmjEbbYYe8hkdeWYw5kA4-1747285285-1.0.1.1-JG6s1MfuRUTRcmztG1bTqbOlBWvHx8x1v5.clYpMvME",md: "WjgTiDdP1jCIiioSwgN88wmSTMAVW2z36idD7nlOtCo-1747285285-1.2.1.1-TNfKVbn82vJ9pph4lmQzlimuQs4WRxc9PHou4dF3nIEQPlnrVg2Q.BT5w4QPqA8vsdm16TW2c9mhlyDwg8mbHvx0BsyWE59RWanf_lKDWpG.qARhTMHnx9G4z.qBJ2BPvqk_.BKfvO19V6AUhsoUuxKwnUt3YkMFFnY_GUAA_vCu6fzr8Q6S0XsaVE4YOIGu4KQoMQLVKa4l8rRySL1m9r8S9pP_mkOLy8LnSO4p8iDVBrlolnVV.vXe3zqBPM0a6PE3PaySjeT6_iSRPZtGJVYHgpBptfGi.1XZouuswoRT5.s3dY.gggIwgD5mtpHaxX65PVwA5CTAVUpRIGhj.2LiTeAWJrurqHDxFArk0OkBndO9T9JtncgB9cWT4doe4yc_lcq_4PfDB3xotY.O4MyyhRyjk6RAPkLpL2z8_taiiy6qc.xOpYKLymwxoeXltSlcFZyRRhaQO3KG2p.y2I2ot01cms49D6wYgAkskv1Q2E8UjFhbfcY34iXTEiGzNwLTB_8nkgt_gIc_9lkKBPVUVilQZd0ZQu144QjdDFAQioQVhdUxFQrT8SathjDDZk1UscdSmxnW57KaXFq1lKfFVv1SRVAJv2F8ahfPzpDCxTH8vuT6qO0RQbj7TKp55TqKCDhfN25qpOIdtCfXO5HiDYATkdbGBDhAB91Q8EUmHfqFUxNJhC9ABAL.x5TAqPSVDlLqGokqASbTfXhtkOtVCtqcjEq4N3KCQmIFdX7A1qUAlzZqQJd6gq4W07mwGuPrxFJK.GAnofefx480xSZmFkhFGQOKqC9Rj27f8vDfV7E2jfW2M5TGGj7WERYZuXPMTLdO6xq.BIUKYY1H.R3rIlIlaZSFm_zHt4a1HA.Nneiz5QQKTG.U1ln0l_75XTU4WuNGUoE8AJoVN_g7R28tK8n9t0S1AM72ifubR_s",mdrd: "akXQDAdFcyFw4LkueOhz7emXzB52ndUtbm5Tk.47HI8-1747285285-1.2.1.1-EZa.HG5w0HJVppYSgmVAG2pgNbx2BZJSHX8P8Pj1B.6JuvFjKB6KC4CUEoGr4AKMOWaOgyYdxnHk_YlKQeJOoZskUrOtycNZrWuwHiJQdx0y6Mf4XB0Nlk6bC4MlDW95mjZPS6O_W2pQaBKBFZCwn0d70XAfgP3uHPSwsLyhdE9Fg651b1OwLu_D88KFplkgmvn1AHJs1LpB_LZ1.42PuhREG8S7dbVYK_zdCT6mq0VLxX0IgSeJJ5xWZoUu37bSv1nmB449b8d5YPvWEC22EsrbbWxvnnbk2uC5b47I5XCm6pVmat6tGkUlz45tAjYZFASrz6etihdfQnhYhDcjSswtolXGb7Lc28i5tTeGWQo5Y6FhPQkfohKJsM0viY6E1GQJn4jet9ouplQt6cwTXRGpxFJm.Xnjw3kilRiS9i6Fn1Ur6fzMcPj8FOrgT872OOHEVQm31yhlIeV7dpOp6Tt4NpGN_GdK.RxO2v05ryDf_zwXfNgMcBKU1CCz0nDlDpmswAaaRVOqQvrDO93mvfw7YH30BShJeMS5E1vEB.Eq36F_qJNNWlwOxECRt4E5qm2_VIw7vZZdACgr.VC0gGgWGQz7RR54Cbe4N2Pvkuunm8KwiRe_P6U51x4DHczL5jC.VsloSNxGTv5i5i_llta738CI5G6EZWDrewHYmZPB5ARiJN0bf7VQFXPWWTLw78ILlOVIuxm3KCAXjqVfzsD3ZeGdo8xFuy7YhtBPpLkTDPTPVT64pLXFKCYYRdaPuOoIyMvfP8VooD5DbIzRJq.hhBa6pUGq.5sp2sa6GKkTtNXAa_Fu_QuIl83N4rKmurxPRcu5fhdvDnmxrXExJvrSrjl1jHJzhP_Rp0_kgR6blt1z54.4H48tzmmOw8CIcUwT10_CH7Vc9R6FGyvPEDHJ9Zt1vdAP8VIojCQvLtFDV8STbmB99qKpCqgOBT7rQm0Qia.gKyBnVNshTMfBbSwQoa60WUmbTzMhwptwY8Oin1b6yQEoSxv2ujepvm.RasTSfn1ORiB5TA4H6zXwNJe.RM4DyGutpxSpud33LKybAPlJCf3l2oCRwKy3SRivwNyPjXOr.qF_fgMZxNWHd1iq7la11i4xp7egSfWjSt9j5NhjQZ4GOEa5afjbCvydNbyL9k_3M2pRLs37grOyyOatrZyGLC1Ujt3Dl4yTM_pEiHUsFojcTHuAkEt3CoU0GTzIEzO6Ye5EO7AlqfCQGDtuy1mxJJcPxHnPUxCVDTPIzI.t5uhmhgannUmJDaEC156Jm3FeixxM_YSAeE.D759m.8l825g4l6fjMttrJRYF_eUuAejedDxEEc8tyNCbOfCZrTxoqJe6aeSOCkrLLbpcG5CjokB5hch4OcHXKYzRjVZG8Kc4f4e8nxbTqoy7jtz5KvaC7M0yTvOk2iYLk3qECsp2nn27mX5.Gg6gzBsrUtrOwD3nQ3._Hkk_zHd83clj_dqpnu5.s33AUKX9IpwbZqji9giIHnXr.LmAhhXbmdMwfMsYWzgzBEyrfXfLzfTWhggYADC7Sha6CupH9NNWg33HKS0dIXGtaT26155WCGqhnDorsueZjJIW__mIGHQxPCewcmKo2aMyShJy_GjMlSG__LBl5DRx5FeCaDkiBDiVRYSyADnVjBMTcLk7dDspjFwqTS0W1nyzduM4ALpgEGGVxjE0nMYSZ6p.80FXtFiBzWaMxMTRrenMY7_LELKPmOYZjY78r3K5OTNTUTjMrCj_zBNNa6T7_i2yrplKrJ9P0Gxxd1MRmFLskLFEpuGWdGcTEzQEghb0gBfVK6Ng0b2yoFMBcy3sTLrpLS4esVWujwcQhdo_.BU8Jn9FAwNEPVe1sp3evUKzLfciow"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=940013c82f4f4e70';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\/ttvfjfxfkji\/?__cf_chl_rt_tk=3h.TYHr0_cdTZnwB_VNUIDMmjEbbYYe8hkdeWYw5kA4-1747285285-1.0.1.1-JG6s1MfuRUTRcmztG1bTqbOlBWvHx8x1v5.clYpMvME" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>
Home · About · News · Docs · Terms
