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: '96d464c7bb5c7071',cH: 'dQCzE7crVZCtbzCP2witKU4mw0tdfKadsY06jdlUDSE-1754880293-1.2.1.1-e0s7z87zViVP35pXotNAlC3jPUVKTGyQfuvU.ZW6MraY3_jlMP7Qzr6JmuNfQ9CP',cUPMDTk:"\/u\/gwirpnvnuoxt\/?__cf_chl_tk=5RoIvy4ynzlFR19JoeMRtMEOmg2Zaik8M5R5wsk9gmo-1754880293-1.0.1.1-Gi9sMrnWtVN3XdkSHUVotRtWwJFlGrNgag8OvH.NXx8",cFPWv: 'b',cITimeS: '1754880293',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/gwirpnvnuoxt\/?__cf_chl_f_tk=5RoIvy4ynzlFR19JoeMRtMEOmg2Zaik8M5R5wsk9gmo-1754880293-1.0.1.1-Gi9sMrnWtVN3XdkSHUVotRtWwJFlGrNgag8OvH.NXx8",md: 'xu4U0O7DYzBJBpWm408vKdiPMBvuE4hGjgdmq7rhkY0-1754880293-1.2.1.1-0zc3ZUXOoyBTLjkfFAdZ3idMlDfD18.gKI8ZWc2q.oFrQPIp9rZj9pvsFvgzEwkc56loj13HiwGSdJtY3uXjuJJxRXqGblU1Cepbpk8dL7Iqj19YE2zrTj0cc07O7R.8YcinuGZvJYmj4ZoX2yBU0BFuKN_6SHeaOfOKtEwYOSAZFTmNht6bWnWyDJqIdlmuXtcmYfhuJ.gaJ.FzqbsuX_YRgmIdqU0UpjHiywqLul6CY1vIkLXuVQpPSlvu9FGAvWc.nHUp18PbhxcVT6zu.TxuX42_FVgxnUP8yitFlsLadGA6L0pdPp2uWipY9GDDBG76jsyaxm9nkWjFiRTGwkIk9fAGEwnFwbpdo7_.3g5.vNo7tJcjL8HH0tZT30bWLGg97vTfEFkmBb4mSVatER2IAeEIp.0VjURBmbWQzf.xipmjq9FhZE2PwMyoUg.kS1zYBVtRhAa6oN8r1HFnvWF6NjVLQuqY2BHwxjndBGSLyZCEQDQHOxBXWBi6265q2tB7qfAOOQOkrq7jsfqi1fQDdYqnTa7hEz9eSkSDYr.VtK6xLuCAqvlYGnBTxIhJhg0bu5ctg3PSsn3V39ANOAsMAnWYVXijNK1g4qc5Umy8F3FXfQA7itk6ZGh6lLotjsGqproCTUiYd6DNOhYV6UPlmTawAA62tyHTFK32BC9HyPyv3dFZuY.2okAHquWQB6nOhAz36HssWIOfOjUKm22ZTFjfSmwaGJ3rXYYcSHdcCmfpt1qejH_H9rB6mjzzNIAltq8pfm.Q5B8P7AlwaitXMguMt3Ud0hAwTsmgzoXjLm9VbulrNFlOtTF3qjwRXrilGaFCKl_7dEn0ij.j7wii_ziMYcKM1HWq8W2cSqWmzyd2UV42kXwN3tQvjWprDcOp_ZbAc.rSFrcn8HLWKAN0EKzc3kDTgtPLUEKxXms',mdrd: 'UPriBW_p3LLw8lTk574CWlBIlqPAVrvXoD7vvEOPvzA-1754880293-1.2.1.1-Fdx_XpjK1Dbsdk1SnzkTvhEu6ntCGY_7DHkKKC23MQXf.iBGxIULTiorx_fa3Fj.IAd3NHQ0x0Rs2qxuDgJk5TiHrDYBU9h85LC06zpnk81w2zPel_WmdxbTCVhO7IHbv7QSFvidXZr5vexHd7ARvpyXYebc7MnQrLUco2bxw2BJvvp.O5zyYDNXc.MPGAGmRPL7sCuL5YkVSD1tsi3Uk.cmDTmTctm7FvxW7zAsto6r877dw796P4wIU9vKWoLNOSkHU2y4s9eXpOOG5LqnGR3MbXxt7nxXu0qqdl2zY86HEhg7xVrv618o6zwbMZ7kdfORjWDlZlz6E3g37yN.RjT3T3AusNDFIAEV2Axjt5pemuBo1X_Z2EFuNCOC7dxS45dKvBlxyObg4yPgt356r7zBbZeUOmx6oK3kYsi4Mx_99RYpH0anfgJOq8aAHJmqjdQpm0AgYoHa.CJRDkQz42ppJZ3vdEsO_ScaDAcPXanlGwcPfvhb40nJNBunWOfWPFfu4KSFUlnfwJG0Q.Eu8ygx5SP5rcnj8wsk3n68eze7SSTkOJl0.EoWsfWJbw61uhkk4SYccQdD2tcWrqB1ByNr.YqHXJRX9S2wB5WsPcQ_1yCvFvvOCALZHX8LaoeudjsnU9O5hea8TjraokkGsVHGd.1SSaZZ.kqcWIrkoeOcymt44LhNxuM0m8freY5R5EWdEH5AYBbGgiunaMKF0NsCgasCZJDvdGrRS.3obVdy6HZZj73oEwNj1Ghft_dkP0i42wmgA27Gtn6RkR2GUgZpQgCQQYOiCDK9UDbX28jqz.9UaeyONkoDjQfb2uNoUYSLj4To8UhP.OSVdU_ctxAi_MoSyfqzMhrsmSWes5Gbpg6SpurpSs3iJZgDraAZU9euEPFZLoYYHtAIl5n50gpGnX.URUNr.WViTzZlrXLf33BLIIG34mNqEs1qCKjFONtqYZUOmXk8ixAvLIbh.2yaGUXxfp.NlwEZA7zX0XD2QWSXA7dL_0SyjMCiYGUOzt2Y6v6O291Gzoe00vXuj9O4vh7Z1xup7BoyUViQDyEg9yeiiqqIo6MlkoQnyg4ekfTq7RKt3UTY1uFb7pzAIIGFwDeoVNz3M18nY5GpouSNJzxr8IahEeoM5mERS8JQWI51LLrwH8XA5MFdfcY4sr3c1tx3ap097zSiqF3dr07TXUjPRvCUpMqi_aOoUcW8Hfjq2D9.Pvx_c9u0idp.enX_0HIlwUK4qvPqUm7fKcSqvBpuQUgvTU8ptzz3T_YSILr3Y.JeBGebg2m6Vlr4cOf.n4PRsmpKhYy2Rm3Pr1RV_F6S7Zh1BE3gxyofVBJIOvvMLQs2.bi.KT5_wZ8eJCme5Mkxjt4t62Ji.GqD1TDB1hikBPGxnYvxVdvqC.m06mfxspNtA6VNuktQfbE1pZjpvqILtN._kzomSptcZZMzxw_k1KFvnxve9c2rJEntXO9Xp8LK925nCCaCkA_VTRlvzdO5JtvdCtJE_oloun.OJblnnSUWRcbfnQTRBFrB2frQqPyM7J8jxeIN5ae4rrJ2tbgAoXN6gUUQ4mepMq2J4uoJYHIij4Ep22or_l.Ahu0esk6yfcBAaOLBLpWg9X0b08LricLpa6g.3FxwdfeZgUfs9rzGxrvhhSvYKbO5UVxuwcgP02TUSd991i5V0ULJOMJQ3G0R5WTqEv8NsG9MbEbDKG3bWX.g.0KKkkYU82SBczw.TsutMKJLgONx1OAiBzifv.UtU8AQbTumQyxlq4D9CBp6Topv7QlMo3XrmpO97oz9EjHyOaT.bXwN7mCx0owJ7gNlQQaWGxVaaW_y_tiCH4Ks69u2zZozWPQMLSTE5rHbUj7P73rtGw67Vp9ll.xuWQGJcNk_vULpXiI',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96d464c7bb5c7071';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\/gwirpnvnuoxt\/?__cf_chl_rt_tk=5RoIvy4ynzlFR19JoeMRtMEOmg2Zaik8M5R5wsk9gmo-1754880293-1.0.1.1-Gi9sMrnWtVN3XdkSHUVotRtWwJFlGrNgag8OvH.NXx8"+ 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
