{"id":7377,"date":"2025-06-28T20:48:31","date_gmt":"2025-06-28T15:18:31","guid":{"rendered":"https:\/\/namastedev.com\/blog\/?p=7377"},"modified":"2025-09-29T19:15:53","modified_gmt":"2025-09-29T13:45:53","slug":"movezeroes","status":"publish","type":"post","link":"https:\/\/namastedev.com\/blog\/movezeroes\/","title":{"rendered":"Move Zeroes"},"content":{"rendered":"\n<!-- PrismJS for Syntax Highlighting -->\n<link\n    href=\"https:\/\/cdn.jsdelivr.net\/npm\/prismjs@1.29.0\/themes\/prism-tomorrow.min.css\"\n    rel=\"stylesheet\"\n\/>\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/prismjs@1.29.0\/prism.min.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_theme {\n  --primary: #E58C32;\n  --secondary: #030302;\n  --light-bg: #fef9f4;\n  --text-dark: #2d2d2d;\n  --tab-radius: 12px;\n  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);\n  --code-bg: #001f3f;\n  --code-text: #d4f1ff;\n}\n\n.wp_blog_container {\n  font-family: 'Segoe UI', sans-serif;\n  background: var(--light-bg);\n  margin: 0;\n  padding: 0;\n  color: var(--text-dark);\n}\n\n\/* Heading *\/\n.wp_blog_main-heading {\n  text-align: center;\n  font-size: 2.4rem;\n  color: var(--primary);\n  margin-top: 2.5rem;\n  font-weight: bold;\n}\n\n\/* Explanation Card *\/\n.wp_blog_explanation,\n.wp_blog_code-tabs-container {\n  max-width: 940px;\n  margin: 2rem auto;\n  padding: 2rem;\n  background: white;\n  border-radius: var(--tab-radius);\n  box-shadow: var(--shadow);\n}\n\n\/* Text and Visuals *\/\n.wp_blog_explanation h2 {\n  font-size: 1.4rem;\n  color: var(--primary);\n  margin-bottom: 0.5rem;\n}\n\n.wp_blog_explanation p,\n.wp_blog_explanation li {\n  font-size: 1.05rem;\n  line-height: 1.7;\n  margin: 0.5rem 0;\n}\n\n.wp_blog_explanation code {\n  background: #fef9f4; 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\/* makes it the reference for absolute children *\/\n}\n\n.wp_blog_toggle-btn {\n  position: absolute;\n  top: 1rem;\n  right: 1rem;\n  z-index: 9999;\n  padding: 0.5rem 0.8rem;\n  border-radius: 10%;\n  background: var(--primary);\n  color: white;\n  font-weight: bold;\n  cursor: pointer;\n  border: none;\n  box-shadow: var(--shadow);\n  transition: background 0.3s, transform 0.2s;\n}\n\n.wp_blog_toggle-btn:hover {\n  background: #cc772e;\n}\n\n.wp_blog_theme.dark-mode .wp_blog_code-tabs-container {\n  background: #1e1e1e;\n}\n<\/style>\n\n<div class=\"wp_blog_container wp_blog_theme\">\n<button id=\"blogNotesThemeToggle\" class=\"wp_blog_toggle-btn\">\ud83c\udf19<\/button>\n<h1 class=\"wp_blog_main-heading\"><\/h1>\n\n<div class=\"wp_blog_explanation\">\n    <h2>Problem Statement:<\/h2>\n    <p>\n        Given an integer array nums, move all 0\u2019s to the end of it while maintaining the relative order of the non-zero elements.\n    <\/p>\n    <p>\n        <strong>Note:<\/strong>You must do this in-place without making a copy of the array.\n    <\/p>\n\n    <h2>Examples<\/h2>\n    <p><strong>Example 1:<\/strong><\/p>\n    <p><strong>Input:<\/strong>nums = [0,1,0,3,12]<\/p>\n    <p><strong>Output:<\/strong><code>[1,3,12,0,0]<\/code><\/p>\n\n    <p><strong>Example 2:<\/strong><\/p>\n    <p><strong>Input:<\/strong>nums = [0]<\/p>\n    <p><strong>Output:<\/strong><code>[0]<\/code><\/p>\n\n    <h2>Constraints:<\/h2>\n    <ul>\n        <li>1 <= nums.length <= 10<sup>4<\/sup><\/li>\n        <li>-2 <sup>31<\/sup> <= prices[i] <= 10<sup>4<\/sup>-1<\/li>\n    <\/ul>\n    <h2>Optimal Approach: Two Pointers<\/h2>\n    <ul>\n        <li>\n            Initialize a pointer <code>x = 0<\/code>.\n        <\/li>\n\n        <li>\n            Loop through the array:\n        <\/li>\n\n        <li>\n            If the current element is not 0, assign it to <code>nums[x]<\/code> and increment <code>x<\/code>.\n        <\/li>\n\n        <li>\n           After the loop, from index <code>x<\/code> to the end of the array, fill all values with 0.\n        <\/li>\n    <\/ul>\n\n    <h2>Visualisation:<\/h2>\n    <img decoding=\"async\"\n        src=\"https:\/\/namastedev.com\/blog\/wp-content\/uploads\/2025\/06\/Screenshot-2025-06-28-at-8.46.31\u202fPM.png\"\n        alt=\"Move zero\"\n    \/>\n                <h2>Time Complexity:<\/h2>\n                <li>\n                  <p><strong>Time Complexity = O(n)<\/strong>\n                <li>\n                    One pass to shift non-zero elements.\n                <\/li>\n                <li>Another pass to fill in zeros.<\/li>\n                  <\/li>\n                <h2>Space Complexity:<\/h2>\n                <li>\n                  <p><strong>Space Complexity = O(1)<\/strong>\n                <li>In-place modifications with constant extra space.<\/li>  \n                <\/p>\n                <\/li>\n<h2>Dry Run<\/h2>\n<div style=\"background: var(--light-bg); border-left: 4px solid var(--primary); padding: 1rem; border-radius: var(--tab-radius); margin: 1rem 0; color: var(--text-dark);\"> \n  <p><strong>Input:<\/strong> <code>nums = [0, 1, 0, 3, 12], x = 0<\/code><\/p> \n  \n  <pre style=\"white-space: pre-wrap; background: var(--code-bg); padding: 1rem; border-radius: 8px; overflow-x: auto; color: var(--code-text);\">\ni = 0 \u2192 nums[0] = 0 \u2192 skip\ni = 1 \u2192 nums[1] = 1 \u2192 nums[0] = 1, x = 1\ni = 2 \u2192 nums[2] = 0 \u2192 skip\ni = 3 \u2192 nums[3] = 3 \u2192 nums[1] = 3, x = 2\ni = 4 \u2192 nums[4] = 12 \u2192 nums[2] = 12, x = 3\n\nFill remaining with 0s from index 3 onward:\nnums[3] = 0\nnums[4] = 0\n  <\/pre> \n  \n  <p><strong>Output:<\/strong> <code>[1, 3, 12, 0, 0]<\/code><\/p> \n<\/div>\n\n<\/div>\n\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\">\n            JavaScript\n        <\/button>\n        <button class=\"wp_blog_code-tab-button\" data-lang=\"py\">Python<\/button>\n        <button class=\"wp_blog_code-tab-button\" data-lang=\"java\">Java<\/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=\"cs\">C#<\/button>\n    <\/div>\n\n    <div class=\"wp_blog_code-tab-content active\" data-lang=\"js\">\n        <pre><code class=\"language-javascript\">\nvar 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    <div class=\"wp_blog_code-tab-content\" data-lang=\"py\">\n        <pre><code class=\"language-python\">\nclass 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 class=\"wp_blog_code-tab-content\" data-lang=\"java\">\n        <pre><code class=\"language-java\">\nclass 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  } <\/code><\/pre>\n    <\/div>\n    <div class=\"wp_blog_code-tab-content\" data-lang=\"cpp\">\n        <pre><code class=\"language-cpp\">\nclass Solution {\n    public:\n      void moveZeroes(vector& 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\">\nvoid 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    <div class=\"wp_blog_code-tab-content\" data-lang=\"cs\">\n        <pre><code class=\"language-csharp\">\npublic class Solution {\npublic 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<\/div>\n<\/div>\n<script>\ndocument.addEventListener(\"DOMContentLoaded\", () => {\n  const buttons = document.querySelectorAll(\".wp_blog_code-tab-button\");\n  const contents = document.querySelectorAll(\".wp_blog_code-tab-content\");\n\n  buttons.forEach((button) => {\n    button.addEventListener(\"click\", () => {\n      const lang = button.getAttribute(\"data-lang\");\n\n      buttons.forEach((btn) => btn.classList.remove(\"active\"));\n      contents.forEach((content) => content.classList.remove(\"active\"));\n\n      button.classList.add(\"active\");\n      document\n        .querySelector(`.wp_blog_code-tab-content[data-lang=\"${lang}\"]`)\n        .classList.add(\"active\");\n    });\n  });\n\n  const themeToggle = document.getElementById(\"blogNotesThemeToggle\");\n  const themeContainer = document.querySelector(\".wp_blog_theme\");\n\n  themeToggle.addEventListener(\"click\", () => {\n    themeContainer.classList.toggle(\"dark-mode\");\n    themeToggle.textContent =\n      themeContainer.classList.contains(\"dark-mode\") ? \"\u2600\ufe0f\" : \"\ud83c\udf19\";\n  });\n});\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>\ud83c\udf19 Problem Statement: Given an integer array nums, move all 0\u2019s 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<\/p>\n","protected":false},"author":108,"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":[322,260,176,175,212,211,811,810,174,172,173],"tags":[],"class_list":{"0":"post-7377","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-algorithms-and-data-structures","7":"category-c-c-plus-plus","8":"category-csharp","9":"category-cplusplus","10":"category-code-optimization","11":"category-data-structures","12":"category-data-structures-and-algorithms","13":"category-dsa","14":"category-java","15":"category-javascript","16":"category-python"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/posts\/7377","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\/108"}],"replies":[{"embeddable":true,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/comments?post=7377"}],"version-history":[{"count":2,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/posts\/7377\/revisions"}],"predecessor-version":[{"id":10162,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/posts\/7377\/revisions\/10162"}],"wp:attachment":[{"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/media?parent=7377"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/categories?post=7377"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/namastedev.com\/blog\/wp-json\/wp\/v2\/tags?post=7377"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}