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: '96cc10c36fced47f',cH: 'xk6e2YQuSbrCS9CoIQwqjmsOkhLbwzbi4DqPp9GlfhE-1754792965-1.2.1.1-3W9y1YgEYeh8BSEFqKeYSNOpvWkinJApVk0wqNSFGSXwvGUJW6s9f2aEhJxnyS6Y',cUPMDTk:"\/u\/zgoesnkyowk\/?__cf_chl_tk=Q8BhRM_z20Jb8ktTGCmCypLhc0ZLkdRsCqMOOkGHdPk-1754792965-1.0.1.1-_buDObxRd9KFmiDnreCyi7P0OZHY3FLKLfj8WqH_jp8",cFPWv: 'b',cITimeS: '1754792965',cTplC:0,cTplV:5,cTplB: 'cf',fa:"\/u\/zgoesnkyowk\/?__cf_chl_f_tk=Q8BhRM_z20Jb8ktTGCmCypLhc0ZLkdRsCqMOOkGHdPk-1754792965-1.0.1.1-_buDObxRd9KFmiDnreCyi7P0OZHY3FLKLfj8WqH_jp8",md: 'DpNBg8lfNs2mFwphL9K3El.1pDzI81DSfeeVCAW1nM8-1754792965-1.2.1.1-UPw3N1Im3yV5kfW3MiCqy_66VYB08516jBzBMNAn6wIbUrTctFNNzTkqhsV54ijNadcBV734CCsWIQykUCwSEz0SRx3bf_66VTJCVLRtMGqcVzCzORVsp0W9_M_Tk3tNVbmDmeOKvUSICvHySE8dS83gUcBW_J1nAjGZeCp5PW30zMN0DoU3QL0bCofPtCGu012lohXLYWhHnHTec.PpmxOJyIaOpJFqD9EhNWpk9cOlpM_f.tdjA9J.ax2.gxMC2FjvmdbcJWwfV0sRfvYeX0ml35bCfaF1pTS7dan0nG9rTeaWd1dfcL_aaYnHuWTCx0CLRJPaXHVCsi0N84YGSfxvqBpe02._zU5XjShYlnLcEM5cd6.ZeMq3zRsoY6R7JdjC7USJyrMoo5Je.SmUng98iTvEvghP7mtsRgis1.MDrqpbtsgJag7YDkwR33klnmRxoJ02yHiA9zF2u..OLWpXTVnkbi7.kGNHMcNXMHQL2cAm.S0u2w4Te0SFE1GMTkjterR3uQXfDQyz7XV5nruK37SsoGKXciiwE_OrHCQ7VpydN_PIfY_uNV8mM6svFEemZIKPe7_.AbJU2uYqd4lpYgdCf2V6RspY2mMgplq0inEjU6rJym9YtC.mJ5vmM.9.aGZDka4ARZUW5rSm9igzFxv8rCQpo6SRfrz..vWBKw9zKNnjGwChYiucIj6P.Tul4eIhSMChj8cbt88YUNXHwtjs51pr.fanaUlFWDaFnB_KZBYalUNZ4Wg12J3HntrOzTXfqQeRf9dM1VBh6hO3Sbzf9vzXckQn.PE3iuZo2tmkLcb4g7p3npRPRcGdcxdsl97bAq14tWeDVJs0hUsMzCZVjMO6Os86qXMkTBsrdinRjHJxUeGNBpT51hl4p2JUA8QDH1KbF7Ha4jHsNlgTd39oxBXGlDu.JAKZp10',mdrd: 'fXXTY_yuGakemX7h7ULqi2wFnphR5UoZej5pSMVrs.k-1754792965-1.2.1.1-eUd7TfK8hdZ7DwR1ie2YyXEit3CjyLD.VRIRdQBlBzE6TImV.cT9HC478FSyO2ksla0N0Mqo1sECf.fvbc6IjJMHoBvqvSrTL_YDO.t6DnqtIo_BPQTAqgNR7YH4fo2S.tu56VWhrdDB2GsgiMwZ.SgH6OR3iszypyer80tqistOmY15qKQfKCFe1BQroZU7mJSzHzlVbEfAosQo4TE5C23V9h2zke4g5DR8cOfM0heIq_Y4leilmz78RsdqA9k1pbTxqKWuV3.evpfCjzepgdxrKoIgk2Uyzy0We0I6VxHFB29bHK.52gjG4jSR2yO4DujOtyPvzUK1MXXm3ZiE5WG7pl5JPstm3aF2JnK0YICf3T6qgpNP92QfLc8wooBBw2uNLdYBEs_YZEvLsC90Y4uT4SZnvXYvubhM22n5WyRQQZ556Nxt5pXDnxT5VruvzKg9LI8Rn_a5m05UjlKKwsNPUJhMI9ci.OPA6dURouGlIj9uU8F.66wK6Dd_FqGKswZIrfOlqhJRQ6fU_ZvSZ_E0gUt4Am7tSl1X1P6kr8nSzmSjp561KQq3aVIzwKoSNBgVjFJo8fbe4b9r1cSju4GxugUxAEmPj4Wwi6amvDF.H0Uc6xZpZEfHdLt0T73EYAq20g8Bm.MqgUbTTTvVeLi2oqlvOvyPIFrdXnhjUNTVR48iHK1o4fSe5dV7i20ok5u8f6NKkjLii62WtLaGYzXNPicSUhcdL7PporIfVsYLCHz7kOzsU70KskXgPEJwsoWIWnqa4Q2wUhu9tiYHWY1E1j__dikpmhmvM4acAEVRfDUs1xUdhrm3a_GdHcAz2ufQOpN2sLUpM9f3921rO_LbqN0X7.5jIjla0gzSFZvMSsEDlLmjdHt160mOAjeaL_ohKFp.cOqJ1Os0.lJvBWfQWfmG_A7YtOozkgyLMgtjVmZi5FMKovtADNGH6ZCxqosb9Lmu.9qwMI7pfGEMbrp5BkNxrooL68giz_5KSu_0jsVRSnkwRIYVKJEN2CMwraQNVN6TqqHhBtld9bkZpgbKHpkIP_uYr3RmCvMzBIxo0ZzbsjlhwsDYkq1rcNjzLi05tk6fDqU_d4cqYjtgaz5i55TxupUqL3I8fUlsT2B3EhAAK100QXB5MNAb1W2VFAvyLNTpX5CLxe7OyKFjyTzPLLikaa6Z1SkNDCdwSTD89q9KAK57bQ9WOeuRo2REdPWnh2vUhXapgQ40G9oZgFs7KjgkQQuyknp2mjbe_vhPg3hjakmQwrVYKva73W8jq.DI8uYgH5tMcgqZUoj6meMVFvtW5BlOPayG9xBFxBT5inKj7qkj.mBTuGw_DiHV34WGMERJjzgBhIzHRKg8Oy8udy9HG_Q8aa4UOcNW.c8.jdPNUhKQQAeZcWy1sa.DhAxunQPyuWcJkaz8oB4pS.QXIFKP9SjyOtt6oLZLrPQXQvo6eVwYqav62VaLIcuAF5keZVnyMy45wIlpZCDNpodUp0Ul.mYjjfNjP9DhSnSlp.641oUJS_f6WhQ11hWfRztn.qxtVggQFJ3YJqXDNWvfel5dAKyhyfuwVFW44Mv0p0ALe0qE5ijzBQVr7PnNsvCMlZ_eIxX7.6pxZ.BjP4s5wRUkyFBBSCE_rog0FQ3NtYJ2bH47zJICj5ZSp0AhiqAD5zsBjbNymtL3dfKaDCQU86ikulwMVC4iL7mrcqhgOkFX_mabR7LyF5gqhP2EBtbYbhTGzSzO1DNo3z_EXz3YHYu6Lb0b7XM1jFuBqlJ_wxMdppODbYsrFvVGtz1HIBoQI5R4LUoNazF9M2gOip7EzsCouVvrA.zTTLE8wDQyxRpjfGEwfLGmCQUS63bkewyu0T1FMOqEaEIaskbEXg',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=96cc10c36fced47f';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\/zgoesnkyowk\/?__cf_chl_rt_tk=Q8BhRM_z20Jb8ktTGCmCypLhc0ZLkdRsCqMOOkGHdPk-1754792965-1.0.1.1-_buDObxRd9KFmiDnreCyi7P0OZHY3FLKLfj8WqH_jp8"+ 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