{"id":6803,"date":"2022-03-14T11:43:06","date_gmt":"2022-03-14T06:13:06","guid":{"rendered":"https:\/\/golangbyexamples.com\/?p=6803"},"modified":"2022-03-14T11:44:45","modified_gmt":"2022-03-14T06:14:45","slug":"non-overlapping-intervals-golang","status":"publish","type":"post","link":"https:\/\/golangbyexamples.com\/non-overlapping-intervals-golang\/","title":{"rendered":"Non-Overlapping intervals program in Go (Golang)"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_17 counter-hierarchy counter-decimal ez-toc-light-blue\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/golangbyexamples.com\/non-overlapping-intervals-golang\/#Overview\" title=\"Overview\">Overview<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/golangbyexamples.com\/non-overlapping-intervals-golang\/#Program\" title=\"Program\">Program<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"has-luminous-vivid-orange-color has-text-color has-large-font-size wp-block-heading\"><span class=\"ez-toc-section\" id=\"Overview\"><\/span><strong>Overview<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"has-medium-font-size\">An array of intervals is given where intervals[i] = [starti, endi]. We have to find out the minimum number of intervals to remove so that the interval in the intervals array become non-overlapping<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Let&#8217;s understand it with an example<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">Input: intervals = [[2,3],[3,4],[4,5],[2,4]]\nOutput: 1\nExplanation: [2,4] can be removed and the rest of the intervals are non-overlapping.<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\">The idea is to first sort based interval start time and then count the overlapping intervals.<\/p>\n\n\n\n<h2 class=\"has-luminous-vivid-orange-color has-text-color has-large-font-size wp-block-heading\"><span class=\"ez-toc-section\" id=\"Program\"><\/span><strong>Program<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"has-medium-font-size\">Here is the program for the same.<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">package main\n\nimport (\n\t\"fmt\"\n\t\"sort\"\n)\n\nfunc eraseOverlapIntervals(intervals [][]int) int {\n\tlenIntervals := len(intervals)\n\n\tsort.Slice(intervals, func(i, j int) bool {\n\t\treturn intervals[i][0] < intervals[j][0]\n\t})\n\n\tprevIntervalEnd := intervals[0][1]\n\n\tminIntervals := 0\n\tfor i := 1; i < lenIntervals; i++ {\n\t\tcurrentIntervalStart := intervals[i][0]\n\t\tcurrentIntervalEnd := intervals[i][1]\n\n\t\tif currentIntervalStart < prevIntervalEnd {\n\t\t\tminIntervals++\n\t\t\tif prevIntervalEnd >= currentIntervalEnd {\n\t\t\t\tprevIntervalEnd = currentIntervalEnd\n\t\t\t}\n\t\t} else {\n\t\t\tprevIntervalEnd = currentIntervalEnd\n\t\t}\n\t}\n\treturn minIntervals\n}\n\nfunc main() {\n\n\toutput := eraseOverlapIntervals([][]int{{2, 3}, {3, 4}, {4, 5}, {2, 4}})\n\tfmt.Println(output)\n}<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Output<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">6\n13<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Note: <\/strong>Check out our Golang Advanced Tutorial. The tutorials in this series are elaborative and we have tried to cover all concepts with examples. This tutorial is for those who are looking to gain expertise and a solid understanding of golang &#8211; <a href=\"https:\/\/golangbyexamples.com\/golang-comprehensive-tutorial\/\">Golang Advance Tutorial<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size\">Also if you are interested in understanding how all design patterns can be implemented in Golang. If yes, then this post is for you &#8211;<a href=\"https:\/\/golangbyexamples.com\/all-design-patterns-golang\/\">All Design Patterns Golang<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Table of Contents OverviewProgram Overview An array of intervals is given where intervals[i] = [starti, endi]. We have to find out the minimum number of intervals to remove so that the interval&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false},"categories":[1],"tags":[3,4],"class_list":["post-6803","post","type-post","status-publish","format-standard","hentry","category-tech","tag-go","tag-golang"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Non-Overlapping intervals program in Go (Golang) - Welcome To Golang By Example<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/golangbyexamples.com\/non-overlapping-intervals-golang\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Non-Overlapping intervals program in Go (Golang) - Welcome To Golang By Example\" \/>\n<meta property=\"og:description\" content=\"Table of Contents OverviewProgram Overview An array of intervals is given where intervals[i] = [starti, endi]. 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