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: '96b8546219b8c95f',cH: 'evtWhxN41VFinhuaqlgrOrfFiijrhlubDwDP0m2GoVY-1754586020-1.2.1.1-ZT82fMFj4tEzrw_A_4zkZb9X4XJPYtHZzI2_S8nugHx6sHP2weWyQA44Nh7KiHck',cUPMDTk:"\/u\/stdgvlllh\/?__cf_chl_tk=zbTg84OlWA2RjIBRdF8LDVezIcjEsjfuTjKEDhZXG7w-1754586020-1.0.1.1-atl0R6c2DNgak_f871kxt2V8v4JhMu403Nnud7Ff_.I",cFPWv: 'b',cITimeS: '1754586020',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/stdgvlllh\/?__cf_chl_f_tk=zbTg84OlWA2RjIBRdF8LDVezIcjEsjfuTjKEDhZXG7w-1754586020-1.0.1.1-atl0R6c2DNgak_f871kxt2V8v4JhMu403Nnud7Ff_.I",md: 'dInFtcBvAf6_1UqCXPMUTBtU4lrccOelb_x72Py.kM8-1754586020-1.2.1.1-0h_IEU3S925F0aS6Bv1DosiBQHnXdw0iW69o9pGu9TgTRuP.tD3Bm6HFEre0GVbKXpy8EZZkPFypNUH3rVydx.mdZkQEuqMUKouN3bCnPZ7MWPchYyz7S4Etab3hxgY3sYmbUN3R6LrVw_pbpm9JqMOYVHNwlJris9fFCWNHJTYmV9zNsM5dz5qZpFhIuob0G4rCg78o2u7jzuOBlc4a3BWu4geB1FYRIrKZFnvoU0ipnHB71o_z9yTXdNFxSBgvZ3y0bSHMVP5TU.fn0jsBk.n_OPFil6qQW7ijQ4SuG8UkqrOuRcoeu0wDAGi7N4ILuR1afmg8hDaHq.ddLnFYuVpgOGPKdFgSf.Gn8Yv.Bj9MY..h7D5MPAoNx4GRR6TEuE_SDvcBSPfsc2Lacw44vBR0dOzl2IOFERpfwfFJMoTS_wwpRRGLzCTz1wxSr7zDbvErLClc9zgVfoJd_70ORvcOxqjuSDxFDq6Y_dcV_sLCZEYqtKgCWHifP5.1uGhIaI3LBjCurXnHHGp6g15thKy48F..Ez.BWv6_ih8GkrSqguUBDhJQ9dJMIbvJDiyJYHyrYCnQOCRoKNONsvyxMMyuEu1AzFhuviu4vPt_zl4uO0R_ZX1xZfjxXH.ekVTKWzU3ijtr49Yb9gMxS8Lcut7yGH6PGmX64.ygQPTv6dckzz7.JXZp3mC8MO8uiMXCvTehRuI0tVSBsNX_2epgV4uX7j0V_5tFgXjoIFCetkReFW.SM.YN7sVlFalZO5kvS5nPL6EAG54.Jz.ESVZLE0O.t8fRebiN7tYFlgMwFy0IvPcMWnHC.eWdmVnhQUzgLfFQ3fg9vMuFw2BzPPnkIpa0sT1WrpPoba.v9hFMtTRx3BkahlDVciEOpry5EMYyEm4PfnJQkk7IY1nMGYjuLZIQFVAB32uC7j1wq3gwcP0',mdrd: '_ZqZ5amMEGXpEmSsMp4jsgnTuA4mYMJxxFBHsblX_Ns-1754586020-1.2.1.1-2o2UxSpIrlKMv3fMTLz7ksrn.X2bvSndVuTIIwP7rQkOLbiubLqaYnrJlY6Qew9JZhumicxeEfXSstoV6k.wyt_yiUKlU17xPAcpYxz8nvU7ZBL4OtB0YKmD.MrNdO.ZacIT7d0BICL9Ka_NXtSkNEvSeIgsGfMK.JEzn19jlQ3uh1ZLGt51ssbm3Kml8.s3S3yp9NXF2iyoOHhvdF8haF2aZ1QGacTGy0nDkbJ45nNeAVbgACl1IEVjxkw8BF8SQm6oeX6Ihv3hXvIkkk5Vy0x55W9xSLVFAnwVCb9WUiJQC6cmjz34WX8DLvqnvD6femGeCbo1ilLJ4o4nUl2GhaQptbOo7JW8I_c.uLU9iMm6ify0lIRww_ogM.cIyD8ruvBUuYLylDGWc3gG8tv1kurKd84ndhAmgpV7M6fncJYicn59NwLvDbcnKsBHM.0gWlsWL5OETZU9P6LlHMuYFmsruPNtlNVaZIfiOxyDlvVcjmlpndCg7rBiI9P4YXI09J6J5mfVuOotIZYfwTbwpa1D00DzwWoKxTQR2gYN6SwJcQVA7SLDzMVutdyJVImNxKc1VcKc9uk.0Xf1Nd23XPwInKbpHT40KWfqg5shl7vHkmdnFkpsttjGTNWYEE6vqbE8KDqZIzPZdKPdegx9zIE5b8eavQJSt__cqBXhv07_knGUxsyMo2rBsFTkKbb8z3AYz7AqsFwte0qBShUoRhCwj60j.iGvOcg4jcgVALoNYXhgsZSqOVwt6YaL5DqUcFjAY6ebpiu6pXhaQFiFWADH2O1OVURFfzufrs2yPB85A3_tl1JLhF6DqL_DL7Rc_PFdzSaYjyvKi3H0jSrBBEe0HpOv.jixxnzuUiSGybgYY5TYgN82vxtjMR665MRDgxaskE797cNpbBUecuVdxM7ocRdMp5IrQuDCekYRpXL3S3kZ9afIOAEilPH7zcVvbQEgsOxxSpXuhJYrN6.fiAyUlWrhmpeHAU51.2CnTPWF2uwLB_s4KmNXpI2wsoQ3C6NzAGue8Ss9AhjI8ADWEZDTE.boAoD2nBajwKFPp9ioUhvicY6inyGkfsqvBboJJrNJgtILF1I5uZBbqbHxTEG0gkDiK4fHdIGO9OQjSpdabLYww4AX7b35uvbE0beCYXDG91MVCIsInovvAwl3TWKEne.WRJ_ep7zVMw4ar5spt.Tv9FxM1uInOSClqv.cQxfCTC5umKrVgIiIFTyLFAaUic_kqMOFcrDD2WzRgoDA1Ttao0xu_tI1h.Quj8YZIt_Tesmh5Uqvzh0ZpEhazBokpxsNYRM1HfPVhvkwLfYU9997UWcuTSUcpVBFZs2Cv_DEOM3FmTC1LTdnKDt3ECBQoJucSnD.6GI89otqQvHjhJBC1aKiuiqBVw_nW4Re3YEGIJpzwYx2KFqrKY9NhpHhYXdlPaoNeWsoJ13z_4U4DlDCp3HUzBmP9kdSNt357BF7Pqqcvz1YunI8uYybVvRTO1Ax1sYDh7a7eRZDwWeVefve3xkeZtZ3aLga2zC1SYyYQ0coVUHn3B_JxL4KGOhs7FkK_I9_GK9_A5UyTeg5lD3FYirw.8Qv.X_qFFfDMhRMEWV2tova6JIDw_ZWXJU4ni7ZROW_Qc_gVKJD33ITlWeSLPSq.H9Z9wb0MY6MZKXsiIWyxUXo894nGTFz6MlxharBWNU8XZ19xKDNcObFcMY0.bglKRLNNYdgCU6p62.Gfump77PPs7BqhHiOblry9ZWvsEHrXyIXZaAFIty597bvk9D4vLJrN50eH_w8_xTIDuWz2XBGl_vz_VEGFygGNxWcnLK1MqkWDXl60HkTJsU8veZZ2zj52o4PK6PvZ1y82tQ7Ji0x5LVkPZRkSO9ZjgkOKKeZxvGch.56GYE',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96b8546219b8c95f';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\/stdgvlllh\/?__cf_chl_rt_tk=zbTg84OlWA2RjIBRdF8LDVezIcjEsjfuTjKEDhZXG7w-1754586020-1.0.1.1-atl0R6c2DNgak_f871kxt2V8v4JhMu403Nnud7Ff_.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