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;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#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: '968dc6b7c80e819d',cH: 'SPcMBblnhBT.SJrgmUvzJ2lZ8A6uSnayECXsSk4HuX0-1754139815-1.2.1.1-XLS6EsBUKSyov49RJy7_FHh0ToQ3wQGtJFe70vPdgL3OhQDiVWXHfk5gNp8vVK7t',cUPMDTk:"\/u\/kdadudpgxat\/?__cf_chl_tk=73s7noYMAGL34NR.D3GpL0QI8y3bQaTOnAhSBq3PGps-1754139815-1.0.1.1-GZp515I_dE3Ot4orkvEHgHWV.3OFTHGjVS15_YmwR68",cFPWv: 'b',cITimeS: '1754139815',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/kdadudpgxat\/?__cf_chl_f_tk=73s7noYMAGL34NR.D3GpL0QI8y3bQaTOnAhSBq3PGps-1754139815-1.0.1.1-GZp515I_dE3Ot4orkvEHgHWV.3OFTHGjVS15_YmwR68",md: 'HkWmq7h7cHbvgdf0Kq9Fs4f68sei6rIAvCz8JrXZIPw-1754139815-1.2.1.1-KIeXYK4MFWis7i.Por28q_g6LwPzfo_YACCFOPaBYwOID6TEHtI1qnyumS15scKexqAcJc5rGUvkjrAN3eeqlsbY5oUuZmCq3zydhmV3rwEy_3ofMHcx46lHUkxIsQysAcWfOantVyUhPUIvNKAetKt1jTQOAK_t.qrytBg6V.vkVdj9HAavLED05kQ4xPfz12Uk7mVi1sUkYUP49_JL6Yn7wbuRh2Y66SEmk88KhLezVXt6.szozaJtv9GA9XeyIbziuEmK16h2bGIfssVBkNOYMjS_OZY26Gvu7c.qqBanVQFT0aCSsW966Lm6_tPU5RR3zKrxa2C08AbJ3I5msAb_uh2vVgHJblFnBT_joi5ExZVx0myWTLvOndkbh4jO6SjPwz_bbuQIjYURMLkjHj5aeZMG6EfyGoFcDGKScU7tYhhLYMiZFOu1VyaJOkC.usUY8bDoPFaLq3VTir3vT9YT0o4iXrOsI6ahukDBuMO8X_eyXZtC4SE9_1v6JCQGwPQKj8HXL8TefSDySPowmAnmwYl8BvYDRt9yo6ofOTmFBPQPfDxOZ4Y.y3pCUhHVnZZ4mahFEiQEHfG9xDd7pjygx2R8RoSA_YuUTZQCYx0BaFDvS7QIZtBWpEr8anSnxOD3Lt80rt4sfZhvttFL.AJBZS3GGYux9yahkgYZA0NGaLLkFywvTQk74v5FMpLXzfXQg6GmedfowJUKgzyH.b6AoVVW14IYWGUzJ5sQZ5noJNiZT5PNssnXlWcoCkJ9vBKICIRfxvibZlp5O2zIe7QdoF7vIadwm4WAE42SGKhy3VYs5tnGEcHy12UccmbO3OluuY601HgaQvDBTB8tKOGvoNYj.FIXjNkIInZOxP2BI4_42eqfvZwujSzXxZBDIici0iB.QO9qzHtl21dJe5yyLgtgLHQxGscMF2UK44M',mdrd: 'R446XrJE2mb4vxIOB_cQHslYrHPIefyNubT7mas.nzY-1754139815-1.2.1.1-obK_DTYCkwO_4yf02vmlDsiARYn3y76fJZ2fVbmV.vcM0GUXe7b6oOOeFgvtu9ojB9Aabe1kyxlVljerdGlG0rdDZ4uCtmS7z_0becgrkvPoRUNu_jvl24IEL2RHSViFxKqVKNsVVIXRSANlkiJdyUEZzIsfSJxvc_UUZws1afQsR9L2ZUFkq8FTfLWfRYa948kYgrKwxlEIR4XH.8ybDW1kDdRhcugduzoVUAeYluJX3XDtNPT7qSPj9XxHUP_0q_kJzzD1Y7.ryPC4Kx_HobsMZ4mdD54xTVCJB8hUXF1061FZxE8_cpVwq2vZO10wycvKnf0s71zZg8DEr5YuhUGrFcmcTBeDeS355snnpr0l7qOemPVIPtuYYPU2AWXY80yipbUanZ45TdeP0WdFrlmRHDDrImjSicG2FNBrVJT5VvWH0GtU9b9wOG8dmgmKA2QoBsfmDquaOljUdwqoLmdgCVC8EVObrDuQajE7kTJhiv0eOtDBMDXV2kpHbWGCIQ1NeWi6uj_8Am4BqHRvWsVJWw1E2G0WbyInYAYT2t38QgUSiXYmVmIhOOB_yqUGlqEtKGAEsF_JOR_aZvgBBp2z9ssZ.XSwMpgfrAgmubfZhSJrIXGGjqh3NXnndYfcajvz8eGJk2CG_tYtkvZLccDqqy3pMpSG2VttOe1ES6lttTqCV0Rqlozgn7XeceO_iUCtcKCtiInQZhCLRTnNDmCtvIr_EQw4aUbx.Xw_ldu2hqvuCMdt6.5Dwlwcytq2y6F.1YTOYrkkEqv4wwtr8hpvS2gPPJHjiz6Dwvg8QFNgUq3ICEe3Ky00I2Y0sbh4cVCz4nHJCanBYr2U3E5t2vR8tv3zPP7Bid8seW6C6uxW_n61TVoPZENHKPe.K8DVZmdThx_givRroWAZu7xMwxJBTAudAtDwW15wmKoEVOyw_vwGkqcRUOpEW4a8J2wPHdTEfVfyHexzaWJS3wn7rSHWKDoOAAcdNfzS9fnrNALod7HOjcq7jN6clADRnYR9cFI3tqhI_9gjZyo9vKICNrrOgsLkuuOR0SBTVTXIUbRmlvEqmZdrfLFlGv7uIuWlOIiD9vbAy9BA_603flLO7EF5EGp5WDYvr6cPwkYtOA2YzGvhcAktR48I8M5zpJuFOUMnrfzyI48.ISgO_pMgsUc7QLwF7y8ss.g5t7jetHAyUmNU61SzMigT2z853.p6x3cQDG56og71xsEYmbRH5_SKk9v2LAD5zre1lXgfCTctW3TvU0JMk4Mo812KqxE.oWOq8SFZEhWl2gJC2XsWs47pIzCymjaL5zrvxg3trQNvZ09_mcWsdEYeZtoPE84Y2gzFuPEH69N_t52qMdPYgEhi1MrdgW6mttS4ZmCCiRH7SaCOU.UNI3DhHfaI1EEHNQitFmjcqGGEVuD2maTAAxaSRO8qk86IpVpdJf_qIotcmeqa4WSR3XJfbQYjDU1SsA9SKygF6H4cph.XUY9HSdqX21TsmjDQh4xsZ2i8Cb93_q8xBQCCHW26at8HZlGro8KhfxMFeVA83J1InDoljx.X65Kjeq1HZ3e8_9SmWDtqCGSZDW96fHI765hGbAnWkEQOBSZwe8SeEt5LhcG3xmkq82JAJXjXdu_ziQHAN2KmEasbzOzpv.Uc5rZWvR1VakKgSTeNHAZhuYo7ZzaXL92xbZTKywndegMtRVE.XmRxTjT4W.Nzq.xWkWt9snD86T4hiweBL9YjMFVgHr2HWh7dLL52r1cV9ir8C_g3D4MEdYZ84KUiudzia_puOR9FOmS4nUuLzSUOebl3I42GaXpXwU.bDMnsgMzExVJl2VdvEJY3cRjOA2LyXEUtJEDC9mkX0bqXmpuTVRsh533dVciv3G3CKPAAW3bfmAMus0c',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=968dc6b7c80e819d';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\/kdadudpgxat\/?__cf_chl_rt_tk=73s7noYMAGL34NR.D3GpL0QI8y3bQaTOnAhSBq3PGps-1754139815-1.0.1.1-GZp515I_dE3Ot4orkvEHgHWV.3OFTHGjVS15_YmwR68"+ window._cf_chl_opt.cOgUHash);a.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(a);}());</script></body></html>
Home · About · News · Docs · Terms