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: '96ab474cfc6a90c8',cH: 'NLb43FcXvLACGqXR9nPnxrzpDnM6NRVOgmLWGPUjtgc-1754449169-1.2.1.1-bYy7IN4oOceISvgvX..yNK5ZnUmREGGrqKMf5i4jv_.tUwmhBvtQNyGTerORsiGf',cUPMDTk:"\/u\/rtxorwzzmhgoo\/?__cf_chl_tk=PqNO4SPRkZFZhCeVxJ2uOl_GVhKyY0UzMDx.rbBx03M-1754449169-1.0.1.1-2gGqyURYFl.FRSlo2Sajebiy79JzGce8pyfJ10Awx_I",cFPWv: 'b',cITimeS: '1754449169',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/rtxorwzzmhgoo\/?__cf_chl_f_tk=PqNO4SPRkZFZhCeVxJ2uOl_GVhKyY0UzMDx.rbBx03M-1754449169-1.0.1.1-2gGqyURYFl.FRSlo2Sajebiy79JzGce8pyfJ10Awx_I",md: 'xYwTxrfB2M4HHSu33weWms_BbUFcNBhdeZDu7_7dbAE-1754449169-1.2.1.1-27Kw8SgdTv19YF3nLGHKkB6JBgIUvf6QLpE4orAzm7T5CQaYOD_p2QqdmP.qWhpecLKa66j.jvRJ6koEsMRBGp1bwOrrWjbFh8ZJYk4O10J7Zyz5xU7RTC9Snu4.LzHYe8fxbWqpV997IH6uojTDBkHX_srBMGsmdY4OlF4o7XlccOzb3Abtw23dSYeBmmc2dca1rJRt86t6EeUOts5LgeF6kDBNvQEpq06gbTmhH83X0RL_ywI8.ZqDl2EsHk1PDCdAVL8hLn9FbJcLnc4gq2TZHxg.QDCJTUCgIhbNbKddGF98iH6GKLv5.V2yFBU.L_dQW.J351WbjbSrI0TJIg.wdWMsKXZ7BaytRvtgtvoVYuCYN8qt.JvqfdlROUqoExq6TI8d6ASLaaitG_yiIVgcUZRbq4hIe1XvLimnxLddtmZzJOJXQILBf2lxXw1SgJLniQr9svDwqgeRH_nfM8UH5g7DBvAzb4aAlyJimWfOj_HVnbSPVcDJkQq4HIgQWF_sRqlg0ICbsbgnvXQxZ9rq.xWJfZRk.CYgwwge8Z0i8gAb26X0N80l20NKBqgpsYJNiMG5fRo1Owjtxd7DdLJMtJryzA1L_28vIZVlYnsTQI941OVBUo_sw1cJ5BlbFlN3kcRNEf89mojLbBKYH8zzHkT2DuwF9ItMMHpoaw0w5UdFaZkQ8Yy.wQ_mGkYT1vaVIcJtzDuYka6RIb5PdDZYN.F3fZFWDyoBagxy03Yb_8LhGu973JczCXXHCrwTbCMxtRuBctOXY82_U3hr8wiYeWKqL8IJ0n3RyY4oQ6lWQlszXW0HufjAnvkmj3urYKGB4UcWxMmx63D6EdAeuPoj77fyKTdHh5uHCrwmGX4uUb_XiGLv_fiH7VQnnvg2sUoP.a08EBuABqcmBBeMSGEPzmBq_5SEXrlMQYmrCe4',mdrd: 'bnI6tG_yjh.EXs0UBUIOyCDgmAC0WnmhQR.XaOVlvXo-1754449169-1.2.1.1-BnnMmzJ2UhRkq00Atzo3g1YNqOAa1TA.GtxkdCK4i5w_oCeZ5IUI_Vkrze9jktQC1l8Dy2rXnUosFxc7NaKOx.7ygyNYCBjTyvDv26fFmqP0MPRZvKUTYB3vHuSh4fRwl4ldgitDZpLZkakS7HWIwFJIjLYrgdlHRrIjH6ANInv30Oq6eHK6kGkOSiPJ.wR6N5U3w1PG35jI.mKJCFsKJEv7z3i9sERyovJ3oDJYC_UAUnHbKkzRucYnRZ0k0cip61kG97fymfroYAxftLY5_34pAw4q1TpXAoMG6zF3ATf6jF0.ouvezr4G3uLX3Jc0z7AMSaXTZlKWBE.T0p2aFDt4txCbY_tcAu8zYdpBcCt4q1lS2k5kP_3dH7aN_Zfr2Mk8roT2vHyzmCLCxOvghqNVbLmNhmJspI9dfYS8ULknm440mRt9XbIrIdMrrRKB5OPJyf2XDRop9QeqrufwqFgCsfyxHUhyks6yXd.0eg6CoA5HXWBh4FApolZ78pMhTyP20HbC7cB6KCGwHUiDRLyf7XWpJQKTZnKyn.qPgS6Vg3Z_I_BTsmtmGW2SeBkj5XBWTAs0f1xZSiCTtXuFkRuSlJJ_3QP7QEz43i10Mmrib8xZpZ0xGguyMxZTTNFwoSgoertWOsBr3GzOuCvs4k38Fl_XxgPOgsmXAZTZKl_WoK9Lo2DAetyGhn6S7PAlf5ZycZwbniaC42Wm3.AUo_1S.QGdy1TQfE4c0ecyRJJPoDw1A_DpONo_CV8lIj038zQ4u87VGibsnRVGczRSvl.cYpU88Ft3pKGM85cqPh4jeH4hacUyhDUsYu2HwjtKVZwsHrrw0QZLW51QrnUjRq7QwdQ02Vn213bVAdLohkM.yLUR4hdtz12DHKxkYraSVwt8m3TzF6ib6zAGClCphe3_0AwlmWXd8HxRgAmDa6q4VmxMSzDCEIg8Ntkb4dKFKuw5VWk3XCY2ZMT2Qiht15WXI4URRdu9Dy212icrGWQuFhL_INQvTD81_Zx6KROlZfPRnSyB5l91VNe7r5t8J_FUC.WRzxz0u0vGB6li2nC30ErPMRgcZaLWHdM7mpQs5d1wvHhsQ6XVww4rtI4zb4rsbmbLvqJZtrLqDZ_8shImVENtxgT4fuiYFVpLHfBP25F8Hb7DGHgrr1dxMAS0ZTh91NwPUWqFFXftZipCDWZQ6NjJWRncPJsDvchYOYS2kSjLSRnNaHWhRPrGLBVRcqyYEy59sRzd6qCscS7Am_yqZLvftfwOY9JoA9o9S4uCmGBHJl0w3fhMvu0DxCiYNc5keTFZyRsTy5X2vpQvPO_bIVZ3A4aV2B2cOuFXXyIWpqPF0Z8Pm1iXlbkghNtYBQ333Chimxso3.zykE11BQa4oIt93QHCyiebU7tq_LShS9hrRc1n8rhYYXn8cfKRpd2jOkCIgIPm.g8AoBm32.wWYvNB418gxtkQbldWrJMxuCmTuB8bb_hp937te7L66c00htPqZ6MFKafA01oZZIkVIUeoSb4T0dNY5md9f6YN11V.8k8W9PfsIO6RrfKayX.O3qSj9I_eA8Lf9T7_EZ0N9_DyApJfsN9wgFPn0cB3TkK1F6F34IF2XeH0A5DRQVfADPwALPcGjAWF_YKNDOo2KAlIJ7DVq6N9GDNYUTDvjz9Q9eIrLoX1krdvFF_TNYtKMKasXZfiifwFtZgZtl4ekiJ_bIBpSrEh4Z_jWDG85BvraqGRAX7NIGhpvQFZAAkHnOkq_1suqJs9kAOR94KyGAivTRDhWMUSwWa7IjaIv3iT_VlIZ4qsLmSQtU13JW7foN7etkmB1.sBSiChvZW2P_zPefw9gKgL._eCnNW3sH6HIxONK4a7_zZpAW3neI.R.OOoUE7QPPNlYrlmlaw',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96ab474cfc6a90c8';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\/rtxorwzzmhgoo\/?__cf_chl_rt_tk=PqNO4SPRkZFZhCeVxJ2uOl_GVhKyY0UzMDx.rbBx03M-1754449169-1.0.1.1-2gGqyURYFl.FRSlo2Sajebiy79JzGce8pyfJ10Awx_I"+ 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
