Same technique can be used to find loops in a liked list. If you advance through the list one pointer at rate X, and another pointer through the list at rate (1\/2)X then when the faster pointer is at the end of the list the slower pointer will be pointing to the center element of the list.<\/p>\n
<pre class=code><\/p>\n
\/\/ findCenterElement – finds the element at the center of the list<\/p>\n
node *findCenter(node *curList){<\/p>\n
node *centerNode = curList;<\/p>\n
node *curNode = curList;<\/p>\n
if(curList == (node *)NULL)<\/p>\n
return((node *)NULL);<\/p>\n
if(curNode->next != (node *)NULL){<\/p>\n
while(((curNode->next)->next) != (node *)NULL)<\/p>\n
{<\/p>\n
curNode = (curNode->next)->next;<\/p>\n
centerNode = (centerNode->next);<\/p>\n
}<\/p>\n
}else{<\/p>\n
return(curNode);<\/p>\n
}<\/p>\n
return(centerNode);<\/p>\n
}<\/p>\n
<\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"
Same technique can be used to find loops in a liked list. If you advance through the list one pointer at rate X, and another pointer through the list at rate (1\/2)X then when the faster pointer is at the end of the list the slower pointer will be pointing to the center element of […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39],"tags":[],"class_list":["post-283","post","type-post","status-publish","format-standard","hentry","category-programming"],"_links":{"self":[{"href":"https:\/\/www.hhhh.org\/joeboy\/blog\/index.php?rest_route=\/wp\/v2\/posts\/283","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hhhh.org\/joeboy\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hhhh.org\/joeboy\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hhhh.org\/joeboy\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hhhh.org\/joeboy\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=283"}],"version-history":[{"count":3,"href":"https:\/\/www.hhhh.org\/joeboy\/blog\/index.php?rest_route=\/wp\/v2\/posts\/283\/revisions"}],"predecessor-version":[{"id":518,"href":"https:\/\/www.hhhh.org\/joeboy\/blog\/index.php?rest_route=\/wp\/v2\/posts\/283\/revisions\/518"}],"wp:attachment":[{"href":"https:\/\/www.hhhh.org\/joeboy\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=283"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hhhh.org\/joeboy\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=283"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hhhh.org\/joeboy\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=283"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}