{"id":6146,"date":"2025-05-29T18:02:55","date_gmt":"2025-05-29T12:32:55","guid":{"rendered":"https:\/\/namastedev.com\/blog\/?p=6146"},"modified":"2025-05-29T18:02:55","modified_gmt":"2025-05-29T12:32:55","slug":"move-zeroes","status":"publish","type":"post","link":"https:\/\/namastedev.com\/blog\/move-zeroes\/","title":{"rendered":"Move zeroes"},"content":{"rendered":"\n<!-- Prism.js CSS and JS -->\n<link href=\"https:\/\/cdn.jsdelivr.net\/npm\/prismjs@1.29.0\/themes\/prism-tomorrow.css\" rel=\"stylesheet\" \/>\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/prismjs@1.29.0\/prism.js\"><\/script>\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/prismjs@1.29.0\/plugins\/autoloader\/prism-autoloader.min.js\"><\/script>\n\n<style>\n.wp_blog_code-tabs-container {\n    font-family: \"Segoe UI\", sans-serif !important;\n    max-width: 900px !important;\n    margin: 2rem auto !important;\n    border: 1px solid #ddd !important;\n    border-radius: 8px !important;\n    overflow: hidden !important;\n    background-color: white !important;\n}\n\n.wp_blog_code-tabs-header {\n    background: #f7f7f7 !important;\n    display: flex !important;\n    border-bottom: 1px solid #ddd !important;\n}\n\n.wp_blog_code-tab-button {\n    flex: 1 !important;\n    padding: 10px 15px !important;\n    border: none !important;\n    background: transparent !important;\n    cursor: pointer !important;\n    font-weight: bold !important;\n    transition: background 0.2s !important;\n    color: #242B33 !important;\n}\n\n.wp_blog_code-tab-button.active {\n    background: white !important;\n    border-bottom: 3px solid #0073aa !important;\n}\n\n.wp_blog_code-tab-content {\n    display: none !important;\n    padding: 20px !important;\n    background: #242B33 !important;\n}\n\n.wp_blog_code-tab-content > pre {\n    background: #242B33 !important;\n}\n\n.wp_blog_code-tab-content.active {\n    display: block !important;\n}\n\n.wp_blog_code-tab-content pre {\n    margin: 0 !important;\n    overflow-x: auto !important;\n}\n\n.wp_blog_explanation {\n    max-width: 900px !important;\n    margin: 2rem auto !important;\n    font-family: \"Segoe UI\", sans-serif !important;\n    line-height: 1.6 !important;\n    background: white !important;\n    color: black !important;\n    padding: 1rem !important;\n    border-radius: 8px !important;\n}\n\n.wp_blog_explanation h2 {\n    color: #0073aa !important;\n    font-size: 1.5rem !important;\n    margin-bottom: 0.5rem !important;\n}\n\n.wp_blog_explanation code {\n    background: #f1f1f1 !important;\n    padding: 2px 6px !important;\n    border-radius: 4px !important;\n    font-family: monospace !important;\n}\n\n.wp_blog_explanation h1,\n.wp_blog_explanation h2,\n.wp_blog_explanation h3,\n.wp_blog_explanation h4,\n.wp_blog_explanation h5,\n.wp_blog_explanation h6,\n.wp_blog_explanation p {\n    margin-top: 10px !important;\n    margin-bottom: 10px !important;\n}\n<\/style>\n\n<!-- \u2705 START: Blog Explanation -->\n<div class=\"wp_blog_explanation\">\n\n<p>Given an integer array <code>nums<\/code>, move all 0&#8217;s to the end of it while maintaining the relative order of the non-zero elements.<\/p>\n\n<p><strong>Note:<\/strong> You must do this in-place without making a copy of the array.<\/p>\n<h2>Examples<\/h2>\n<h3>Example 1:<\/h3>\n<pre><code>Input: nums = [0,1,0,3,12]\nOutput: [1,3,12,0,0]<\/code><\/pre>\n\n<h3>Example 2:<\/h3>\n<pre><code>Input: nums = [0]\nOutput: [0]<\/code><\/pre>\n\n<h2>Constraints:<\/h2>\n<ul>\n  <li>1 &lt;= nums.length &lt;= 10<sup>4<\/sup><\/li>\n  <li>-2<sup>31<\/sup> &lt;= nums[i] &lt;= 2<sup>31<\/sup> &#8211; 1<\/li>\n<\/ul>\n\n<h2>Optimal Approach &#8211; Two Pointers<\/h2>\n<p>Initialize a pointer <code>x = 0<\/code>.<\/p>\n\n<p>Loop through the array:<\/p>\n<ul>\n  <li>If the current element is not 0, assign it to <code>nums[x]<\/code> and increment <code>x<\/code>.<\/li>\n<\/ul>\n\n<p>After the loop, from index <code>x<\/code> to the end of the array, fill all values with 0.<\/p>\n\n<h2>Dry Run<\/h2>\n<p>Input: <code>nums = [0, 1, 0, 3, 12]<\/code><\/p>\n<p><code>x = 0<\/code><\/p>\n\n<p><strong>Loop:<\/strong><\/p>\n<ul>\n  <li><code>i = 0<\/code> \u2192 <code>nums[0] = 0<\/code> \u2192 skip<\/li>\n  <li><code>i = 1<\/code> \u2192 <code>nums[1] = 1<\/code> \u2192 <code>nums[0] = 1<\/code>, <code>x = 1<\/code><\/li>\n  <li><code>i = 2<\/code> \u2192 <code>nums[2] = 0<\/code> \u2192 skip<\/li>\n  <li><code>i = 3<\/code> \u2192 <code>nums[3] = 3<\/code> \u2192 <code>nums[1] = 3<\/code>, <code>x = 2<\/code><\/li>\n  <li><code>i = 4<\/code> \u2192 <code>nums[4] = 12<\/code> \u2192 <code>nums[2] = 12<\/code>, <code>x = 3<\/code><\/li>\n<\/ul>\n\n<p><strong>Fill remaining with 0s from index 3 onward:<\/strong><\/p>\n<ul>\n  <li><code>nums[3] = 0<\/code><\/li>\n  <li><code>nums[4] = 0<\/code><\/li>\n<\/ul>\n\n<p><strong>Final:<\/strong> <code>nums = [1, 3, 12, 0, 0]<\/code><\/p>\n\n<h2>Time and Space Complexity<\/h2>\n\n<p><strong>Time Complexity:<\/strong> O(n)<\/p>\n<ul>\n  <li>One pass to shift non-zero elements.<\/li>\n  <li>Another pass to fill in zeros.<\/li>\n<\/ul>\n\n<p><strong>Space Complexity:<\/strong> O(1)<\/p>\n<ul>\n  <li>In-place modifications with constant extra space.<\/li>\n<\/ul>\n\n    \n<\/div>\n<!-- \u2705 END: Blog Explanation -->\n\n<!-- \u2705 START: Code Tabs -->\n<div class=\"wp_blog_code-tabs-container\">\n    <div class=\"wp_blog_code-tabs-header\">\n      <button class=\"wp_blog_code-tab-button active\" data-lang=\"js\">JavaScript<\/button>\n      <button class=\"wp_blog_code-tab-button\" data-lang=\"cpp\">C++<\/button>\n      <button class=\"wp_blog_code-tab-button\" data-lang=\"c\">C<\/button>\n      <button class=\"wp_blog_code-tab-button\" data-lang=\"java\">Java<\/button>\n      <button class=\"wp_blog_code-tab-button\" data-lang=\"py\">Python<\/button>\n    <\/div>\n  \n    <div class=\"wp_blog_code-tab-content active\" data-lang=\"js\">\n      <pre><code class=\"language-javascript\">\n  var moveZeroes = function(nums) {\n      let x = 0;\n      for (let i = 0; i < nums.length; i++) {\n          if (nums[i] !== 0) {\n              nums[x] = nums[i];\n              x++;\n          }\n      }\n      for (let i = x; i < nums.length; i++) {\n          nums[i] = 0;\n      }\n  };\n      <\/code><\/pre>\n    <\/div>\n  \n    <div class=\"wp_blog_code-tab-content\" data-lang=\"cpp\">\n      <pre><code class=\"language-cpp\">\n  class Solution {\n    public:\n      void moveZeroes(vector<int>& nums) {\n        int x = 0;\n        for (int i = 0; i < nums.size(); i++) {\n          if (nums[i] != 0) {\n            nums[x] = nums[i];\n            x++;\n          }\n        }\n        for (int i = x; i < nums.size(); i++) {\n          nums[i] = 0;\n        }\n      }\n  };\n      <\/code><\/pre>\n    <\/div>\n  \n    <div class=\"wp_blog_code-tab-content\" data-lang=\"c\">\n      <pre><code class=\"language-c\">\n  void moveZeroes(int* nums, int numsSize) {\n    int x = 0;\n    for (int i = 0; i < numsSize; i++) {\n      if (nums[i] != 0) {\n        nums[x] = nums[i];\n        x++;\n      }\n    }\n    for (int i = x; i < numsSize; i++) {\n      nums[i] = 0;\n    }\n  }\n      <\/code><\/pre>\n    <\/div>\n  \n    <div class=\"wp_blog_code-tab-content\" data-lang=\"java\">\n      <pre><code class=\"language-java\">\n  class Solution {\n    public void moveZeroes(int[] nums) {\n      int x = 0;\n      for (int i = 0; i < nums.length; i++) {\n        if (nums[i] != 0) {\n          nums[x] = nums[i];\n          x++;\n        }\n      }\n      for (int i = x; i < nums.length; i++) {\n        nums[i] = 0;\n      }\n    }\n  }\n      <\/code><\/pre>\n    <\/div>\n  \n    <div class=\"wp_blog_code-tab-content\" data-lang=\"py\">\n      <pre><code class=\"language-python\">\n  class Solution:\n    def moveZeroes(self, nums):\n      x = 0\n      for i in range(len(nums)):\n        if nums[i] != 0:\n          nums[x] = nums[i]\n          x += 1\n      for i in range(x, len(nums)):\n        nums[i] = 0\n      <\/code><\/pre>\n    <\/div>\n  <\/div>\n  \n  \n<!-- \u2705 END: Code Tabs -->\n\n\n<!-- \u2705 JS Tab Switch Logic -->\n<script>\ndocument.addEventListener('DOMContentLoaded', function () {\n    const buttons = document.querySelectorAll('.wp_blog_code-tab-button');\n    const contents = document.querySelectorAll('.wp_blog_code-tab-content');\n    buttons.forEach(button => {\n        button.addEventListener('click', () => {\n            const lang = button.getAttribute('data-lang');\n            buttons.forEach(btn => btn.classList.remove('active'));\n            button.classList.add('active');\n            contents.forEach(content => {\n                content.classList.toggle('active', content.getAttribute('data-lang') === lang);\n            });\n        });\n    });\n});\n<\/script>\n\n","protected":false},"excerpt":{"rendered":"<p>Given an integer array nums, move all 0&#8217;s to the end of it while maintaining the relative order of the non-zero elements. Note: You must do this in-place without making a copy of the array. Examples Example 1: Input: nums = [0,1,0,3,12] Output: [1,3,12,0,0] Example 2: Input: nums = [0] Output: [0] Constraints: 1 &lt;=<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[811,810],"tags":[],"class_list":{"0":"post-6146","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-data-structures-and-algorithms","7":"category-dsa"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/posts\/6146","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/comments?post=6146"}],"version-history":[{"count":1,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/posts\/6146\/revisions"}],"predecessor-version":[{"id":6147,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/posts\/6146\/revisions\/6147"}],"wp:attachment":[{"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/media?parent=6146"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/categories?post=6146"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/tags?post=6146"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}