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<a href="#namespaces">Namespaces</a> &#124;
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<div class="headertitle"><div class="title">wiggle_sort.cpp File Reference<div class="ingroups"><a class="el" href="../../d5/d4c/group__sorting.html">Sorting Algorithm</a></div></div></div>
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<p>[Wiggle Sort Algorithm] (<a href="https://leetcode.com/problems/wiggle-sort-ii/">https://leetcode.com/problems/wiggle-sort-ii/</a>) Implementation
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;algorithm&gt;</code><br />
<code>#include &lt;cassert&gt;</code><br />
<code>#include &lt;ctime&gt;</code><br />
<code>#include &lt;iostream&gt;</code><br />
<code>#include &lt;vector&gt;</code><br />
</div><div class="textblock"><div class="dynheader">
Include dependency graph for wiggle_sort.cpp:</div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="namespaces" name="namespaces"></a>
Namespaces</h2></td></tr>
<tr class="memitem:d5/d91/namespacesorting"><td class="memItemLeft" align="right" valign="top">namespace &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d5/d91/namespacesorting.html">sorting</a></td></tr>
<tr class="memdesc:d5/d91/namespacesorting"><td class="mdescLeft">&#160;</td><td class="mdescRight">for working with vectors <br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:d0/d52/namespacewiggle__sort"><td class="memItemLeft" align="right" valign="top">namespace &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d0/d52/namespacewiggle__sort.html">wiggle_sort</a></td></tr>
<tr class="memdesc:d0/d52/namespacewiggle__sort"><td class="mdescLeft">&#160;</td><td class="mdescRight">Functions for <a href="https://leetcode.com/problems/wiggle-sort-ii/" target="_blank">Wiggle Sort</a> algorithm. <br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:a99eeded693ac073717282fae365957a1"><td class="memTemplParams" colspan="2">template&lt;typename T &gt; </td></tr>
<tr class="memitem:a99eeded693ac073717282fae365957a1"><td class="memTemplItemLeft" align="right" valign="top"><a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a>&lt; T &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d1/dcc/wiggle__sort_8cpp.html#a99eeded693ac073717282fae365957a1">sorting::wiggle_sort::wiggleSort</a> (const <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a>&lt; T &gt; &amp;arr)</td></tr>
<tr class="memdesc:a99eeded693ac073717282fae365957a1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function used for sorting the elements in wave form. <br /></td></tr>
<tr class="separator:a99eeded693ac073717282fae365957a1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga135e4c638e3bcf548bd122b5f49a3e72"><td class="memTemplParams" colspan="2">template&lt;typename T &gt; </td></tr>
<tr class="memitem:ga135e4c638e3bcf548bd122b5f49a3e72"><td class="memTemplItemLeft" align="right" valign="top">static void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d5/d4c/group__sorting.html#ga135e4c638e3bcf548bd122b5f49a3e72">displayElements</a> (const <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a>&lt; T &gt; &amp;arr)</td></tr>
<tr class="memdesc:ga135e4c638e3bcf548bd122b5f49a3e72"><td class="mdescLeft">&#160;</td><td class="mdescRight">Utility function used for printing the elements. Prints elements of the array after they're sorted using wiggle sort algorithm. <br /></td></tr>
<tr class="separator:ga135e4c638e3bcf548bd122b5f49a3e72"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaa8dca7b867074164d5f45b0f3851269d"><td class="memItemLeft" align="right" valign="top">static void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d5/d4c/group__sorting.html#gaa8dca7b867074164d5f45b0f3851269d">test</a> ()</td></tr>
<tr class="separator:gaa8dca7b867074164d5f45b0f3851269d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d5/d4c/group__sorting.html#gae66f6b31b5ad750f1fe042a706a4e3d4">main</a> ()</td></tr>
<tr class="separator:gae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>[Wiggle Sort Algorithm] (<a href="https://leetcode.com/problems/wiggle-sort-ii/">https://leetcode.com/problems/wiggle-sort-ii/</a>) Implementation </p>
<dl class="section author"><dt>Author</dt><dd><a href="http://github.com/roshan0708" target="_blank">Roshan Kanwar</a></dd></dl>
<p>Wiggle Sort sorts the array into a wave like array. An array ‘arr[0..n-1]’ is sorted in wave form, if arr[0] &gt;= arr[1] &lt;= arr[2] &gt;= arr[3] &lt;= arr[4] &gt;= ….. </p>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="a99eeded693ac073717282fae365957a1" name="a99eeded693ac073717282fae365957a1"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a99eeded693ac073717282fae365957a1">&#9670;&#160;</a></span>wiggleSort()</h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template&lt;typename T &gt; </div>
<table class="memname">
<tr>
<td class="memname"><a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a>&lt; T &gt; sorting::wiggle_sort::wiggleSort </td>
<td>(</td>
<td class="paramtype">const <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a>&lt; T &gt; &amp;&#160;</td>
<td class="paramname"><em>arr</em></td><td>)</td>
<td></td>
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</div><div class="memdoc">
<p>Function used for sorting the elements in wave form. </p>
<p>Checking whether the even indexed elements are greater than their adjacent odd elements. Traversing all even indexed elements of the input arr. If current element is smaller than the previous odd element, swap them. If current element is smaller than the next odd element, swap them.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">arr</td><td>input array (unsorted elements) </td></tr>
</table>
</dd>
</dl>
<dl class="section examples"><dt>Examples</dt><dd><a class="el" href="../../dd/db0/_2_users_2runner_2work_2_c-_plus-_plus_2_c-_plus-_plus_2sorting_2wiggle_sort_8cpp-example.html#a1">/Users/runner/work/C-Plus-Plus/C-Plus-Plus/sorting/wiggle_sort.cpp</a>.</dd>
</dl>
<div class="fragment"><div class="line"><span class="lineno"> 53</span> {</div>
<div class="line"><span class="lineno"> 54</span> uint32_t size = arr.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector/size.html">size</a>();</div>
<div class="line"><span class="lineno"> 55</span> </div>
<div class="line"><span class="lineno"> 56</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;T&gt;</a> out(</div>
<div class="line"><span class="lineno"> 57</span> arr); <span class="comment">// create a copy of input vector. this way, the original input</span></div>
<div class="line"><span class="lineno"> 58</span> <span class="comment">// vector does not get modified. a sorted array is is returned.</span></div>
<div class="line"><span class="lineno"> 59</span> </div>
<div class="line"><span class="lineno"> 60</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; size; i += 2) {</div>
<div class="line"><span class="lineno"> 61</span> <span class="keywordflow">if</span> (i &gt; 0 &amp;&amp; out[i - 1] &gt; out[i]) {</div>
<div class="line"><span class="lineno"> 62</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/swap.html">std::swap</a>(out[i], out[i - 1]); <span class="comment">// swapping the two values</span></div>
<div class="line"><span class="lineno"> 63</span> }</div>
<div class="line"><span class="lineno"> 64</span> </div>
<div class="line"><span class="lineno"> 65</span> <span class="keywordflow">if</span> (i &lt; size - 1 &amp;&amp; out[i] &lt; out[i + 1]) {</div>
<div class="line"><span class="lineno"> 66</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/swap.html">std::swap</a>(out[i], out[i + 1]); <span class="comment">// swapping the two values</span></div>
<div class="line"><span class="lineno"> 67</span> }</div>
<div class="line"><span class="lineno"> 68</span> }</div>
<div class="line"><span class="lineno"> 69</span> </div>
<div class="line"><span class="lineno"> 70</span> <span class="keywordflow">return</span> out; <span class="comment">// returns the sorted vector</span></div>
<div class="line"><span class="lineno"> 71</span>}</div>
<div class="ttc" id="asize_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/size.html">std::vector::size</a></div><div class="ttdeci">T size(T... args)</div></div>
<div class="ttc" id="aswap_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/swap.html">std::swap</a></div><div class="ttdeci">T swap(T... args)</div></div>
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