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<p>The class that initializes the Fenwick Tree.
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Collaboration diagram for range_queries::fenwick_tree:</div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pub-methods" name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a5ea37183524553bbf2234a36a44a4b9a" id="r_a5ea37183524553bbf2234a36a44a4b9a"><td class="memTemplParams" colspan="2">template&lt;typename T &gt; </td></tr>
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<tr class="memdesc:a5ea37183524553bbf2234a36a44a4b9a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Class Constructor. <br /></td></tr>
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<tr class="memitem:aef7ba885b91af093e9e514358fa0f36c" id="r_aef7ba885b91af093e9e514358fa0f36c"><td class="memTemplParams" colspan="2">template&lt;typename T &gt; </td></tr>
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<tr class="memdesc:aef7ba885b91af093e9e514358fa0f36c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Class Constructor. <br /></td></tr>
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<tr class="memitem:a19dea5e88bbd7683a719030623315de9"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#a19dea5e88bbd7683a719030623315de9">update</a> (T id, T val)</td></tr>
<tr class="memitem:a19dea5e88bbd7683a719030623315de9"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#a19dea5e88bbd7683a719030623315de9">update</a> (T id, T val)</td></tr>
<tr class="memdesc:a19dea5e88bbd7683a719030623315de9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Updates the value of an element in original array and accordingly updates the values in BIT array. <br /></td></tr>
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<tr class="memdesc:a1fa0559d987fde0044761b17b35f5abd"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the sum of elements in range from 0 to ID. <br /></td></tr>
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<tr class="memdesc:af7b7a8c1c5724ed8683d7e28bef526e6"><td class="mdescLeft">&#160;</td><td class="mdescRight">Array that represents Binary Indexed Tree. <br /></td></tr>
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@@ -169,8 +171,7 @@ template&lt;typename T &gt; </div>
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<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;</td> <td class="paramname"><span class="paramname"><em>arr</em></span></td><td>)</td>
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@@ -195,16 +196,16 @@ template&lt;typename T &gt; </div>
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<dl class="section return"><dt>Returns</dt><dd>void </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 50</span> : <a class="code hl_variable" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#af9f543aa5976b8cc5422490b3d6250c6">n</a>(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"> 51</span> <a class="code hl_variable" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#af7b7a8c1c5724ed8683d7e28bef526e6">bit</a>.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector/assign.html">assign</a>(<a class="code hl_variable" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#af9f543aa5976b8cc5422490b3d6250c6">n</a> + 1, 0);</div>
<div class="line"><span class="lineno"> 52</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; <a class="code hl_variable" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#af9f543aa5976b8cc5422490b3d6250c6">n</a>; ++i) {</div>
<div class="line"><span class="lineno"> 53</span> <a class="code hl_function" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#a19dea5e88bbd7683a719030623315de9">update</a>(i, arr[i]);</div>
<div class="fragment"><div class="line"><span class="lineno"> 50</span> : <a class="code hl_variable" href="#af9f543aa5976b8cc5422490b3d6250c6">n</a>(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"> 51</span> <a class="code hl_variable" href="#af7b7a8c1c5724ed8683d7e28bef526e6">bit</a>.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector/assign.html">assign</a>(<a class="code hl_variable" href="#af9f543aa5976b8cc5422490b3d6250c6">n</a> + 1, 0);</div>
<div class="line"><span class="lineno"> 52</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; <a class="code hl_variable" href="#af9f543aa5976b8cc5422490b3d6250c6">n</a>; ++i) {</div>
<div class="line"><span class="lineno"> 53</span> <a class="code hl_function" href="#a19dea5e88bbd7683a719030623315de9">update</a>(i, arr[i]);</div>
<div class="line"><span class="lineno"> 54</span> }</div>
<div class="line"><span class="lineno"> 55</span> }</div>
<div class="ttc" id="aassign_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/assign.html">std::vector::assign</a></div><div class="ttdeci">T assign(T... args)</div></div>
<div class="ttc" id="aclassrange__queries_1_1fenwick__tree_html_a19dea5e88bbd7683a719030623315de9"><div class="ttname"><a href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#a19dea5e88bbd7683a719030623315de9">range_queries::fenwick_tree::update</a></div><div class="ttdeci">void update(T id, T val)</div><div class="ttdoc">Updates the value of an element in original array and accordingly updates the values in BIT array.</div><div class="ttdef"><b>Definition</b> fenwick_tree.cpp:75</div></div>
<div class="ttc" id="aclassrange__queries_1_1fenwick__tree_html_af7b7a8c1c5724ed8683d7e28bef526e6"><div class="ttname"><a href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#af7b7a8c1c5724ed8683d7e28bef526e6">range_queries::fenwick_tree::bit</a></div><div class="ttdeci">std::vector&lt; int &gt; bit</div><div class="ttdoc">Array that represents Binary Indexed Tree.</div><div class="ttdef"><b>Definition</b> fenwick_tree.cpp:34</div></div>
<div class="ttc" id="aclassrange__queries_1_1fenwick__tree_html_af9f543aa5976b8cc5422490b3d6250c6"><div class="ttname"><a href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#af9f543aa5976b8cc5422490b3d6250c6">range_queries::fenwick_tree::n</a></div><div class="ttdeci">size_t n</div><div class="ttdoc">No. of elements present in input array.</div><div class="ttdef"><b>Definition</b> fenwick_tree.cpp:33</div></div>
<div class="ttc" id="aclassrange__queries_1_1fenwick__tree_html_a19dea5e88bbd7683a719030623315de9"><div class="ttname"><a href="#a19dea5e88bbd7683a719030623315de9">range_queries::fenwick_tree::update</a></div><div class="ttdeci">void update(T id, T val)</div><div class="ttdoc">Updates the value of an element in original array and accordingly updates the values in BIT array.</div><div class="ttdef"><b>Definition</b> fenwick_tree.cpp:75</div></div>
<div class="ttc" id="aclassrange__queries_1_1fenwick__tree_html_af7b7a8c1c5724ed8683d7e28bef526e6"><div class="ttname"><a href="#af7b7a8c1c5724ed8683d7e28bef526e6">range_queries::fenwick_tree::bit</a></div><div class="ttdeci">std::vector&lt; int &gt; bit</div><div class="ttdoc">Array that represents Binary Indexed Tree.</div><div class="ttdef"><b>Definition</b> fenwick_tree.cpp:34</div></div>
<div class="ttc" id="aclassrange__queries_1_1fenwick__tree_html_af9f543aa5976b8cc5422490b3d6250c6"><div class="ttname"><a href="#af9f543aa5976b8cc5422490b3d6250c6">range_queries::fenwick_tree::n</a></div><div class="ttdeci">size_t n</div><div class="ttdoc">No. of elements present in input array.</div><div class="ttdef"><b>Definition</b> fenwick_tree.cpp:33</div></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>
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Here is the call graph for this function:</div>
@@ -228,8 +229,7 @@ template&lt;typename T &gt; </div>
<tr>
<td class="memname">range_queries::fenwick_tree::fenwick_tree </td>
<td>(</td>
<td class="paramtype">T&#160;</td>
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<td class="paramtype">T</td> <td class="paramname"><span class="paramname"><em>x</em></span></td><td>)</td>
<td></td>
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@@ -254,7 +254,7 @@ template&lt;typename T &gt; </div>
</dd>
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<dl class="section return"><dt>Returns</dt><dd>void </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 64</span>: <a class="code hl_variable" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#af9f543aa5976b8cc5422490b3d6250c6">n</a>(x) { <a class="code hl_variable" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#af7b7a8c1c5724ed8683d7e28bef526e6">bit</a>.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector/assign.html">assign</a>(<a class="code hl_variable" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#af9f543aa5976b8cc5422490b3d6250c6">n</a> + 1, 0); }</div>
<div class="fragment"><div class="line"><span class="lineno"> 64</span>: <a class="code hl_variable" href="#af9f543aa5976b8cc5422490b3d6250c6">n</a>(x) { <a class="code hl_variable" href="#af7b7a8c1c5724ed8683d7e28bef526e6">bit</a>.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector/assign.html">assign</a>(<a class="code hl_variable" href="#af9f543aa5976b8cc5422490b3d6250c6">n</a> + 1, 0); }</div>
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Here is the call graph for this function:</div>
<div class="dyncontent">
@@ -276,8 +276,7 @@ Here is the call graph for this function:</div>
<tr>
<td class="memname">int range_queries::fenwick_tree::offset </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>x</em></td><td>)</td>
<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>x</em></span></td><td>)</td>
<td></td>
</tr>
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<tr>
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<td>(</td>
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<td class="paramname"><em>id</em></td><td>)</td>
<td class="paramtype">T</td> <td class="paramname"><span class="paramname"><em>id</em></span></td><td>)</td>
<td></td>
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@@ -344,12 +342,12 @@ template&lt;typename T &gt; </div>
<div class="line"><span class="lineno"> 91</span> <span class="keywordtype">id</span>++;</div>
<div class="line"><span class="lineno"> 92</span> T res = 0;</div>
<div class="line"><span class="lineno"> 93</span> <span class="keywordflow">while</span> (<span class="keywordtype">id</span> &gt; 0) {</div>
<div class="line"><span class="lineno"> 94</span> res += <a class="code hl_variable" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#af7b7a8c1c5724ed8683d7e28bef526e6">bit</a>[id];</div>
<div class="line"><span class="lineno"> 95</span> <span class="keywordtype">id</span> -= <a class="code hl_function" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#ab492ebf07cab0e3c32d277ad986de801">offset</a>(<span class="keywordtype">id</span>);</div>
<div class="line"><span class="lineno"> 94</span> res += <a class="code hl_variable" href="#af7b7a8c1c5724ed8683d7e28bef526e6">bit</a>[id];</div>
<div class="line"><span class="lineno"> 95</span> <span class="keywordtype">id</span> -= <a class="code hl_function" href="#ab492ebf07cab0e3c32d277ad986de801">offset</a>(<span class="keywordtype">id</span>);</div>
<div class="line"><span class="lineno"> 96</span> }</div>
<div class="line"><span class="lineno"> 97</span> <span class="keywordflow">return</span> res;</div>
<div class="line"><span class="lineno"> 98</span> }</div>
<div class="ttc" id="aclassrange__queries_1_1fenwick__tree_html_ab492ebf07cab0e3c32d277ad986de801"><div class="ttname"><a href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#ab492ebf07cab0e3c32d277ad986de801">range_queries::fenwick_tree::offset</a></div><div class="ttdeci">int offset(int x)</div><div class="ttdoc">Returns the highest power of two which is not more than x.</div><div class="ttdef"><b>Definition</b> fenwick_tree.cpp:41</div></div>
<div class="ttc" id="aclassrange__queries_1_1fenwick__tree_html_ab492ebf07cab0e3c32d277ad986de801"><div class="ttname"><a href="#ab492ebf07cab0e3c32d277ad986de801">range_queries::fenwick_tree::offset</a></div><div class="ttdeci">int offset(int x)</div><div class="ttdoc">Returns the highest power of two which is not more than x.</div><div class="ttdef"><b>Definition</b> fenwick_tree.cpp:41</div></div>
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@@ -370,19 +368,12 @@ Here is the call graph for this function:</div>
<tr>
<td class="memname">int range_queries::fenwick_tree::sum_range </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>l</em>, </td>
<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>l</em>, </span></td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>r</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>r</em></span>&#160;)</td>
</tr>
</table>
</td>
@@ -401,8 +392,8 @@ Here is the call graph for this function:</div>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Sum of elements in range from L to R. </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 106</span>{ <span class="keywordflow">return</span> <a class="code hl_function" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#a1fa0559d987fde0044761b17b35f5abd">sum</a>(r) - <a class="code hl_function" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#a1fa0559d987fde0044761b17b35f5abd">sum</a>(l - 1); }</div>
<div class="ttc" id="aclassrange__queries_1_1fenwick__tree_html_a1fa0559d987fde0044761b17b35f5abd"><div class="ttname"><a href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#a1fa0559d987fde0044761b17b35f5abd">range_queries::fenwick_tree::sum</a></div><div class="ttdeci">int sum(T id)</div><div class="ttdoc">Returns the sum of elements in range from 0 to ID.</div><div class="ttdef"><b>Definition</b> fenwick_tree.cpp:90</div></div>
<div class="fragment"><div class="line"><span class="lineno"> 106</span>{ <span class="keywordflow">return</span> <a class="code hl_function" href="#a1fa0559d987fde0044761b17b35f5abd">sum</a>(r) - <a class="code hl_function" href="#a1fa0559d987fde0044761b17b35f5abd">sum</a>(l - 1); }</div>
<div class="ttc" id="aclassrange__queries_1_1fenwick__tree_html_a1fa0559d987fde0044761b17b35f5abd"><div class="ttname"><a href="#a1fa0559d987fde0044761b17b35f5abd">range_queries::fenwick_tree::sum</a></div><div class="ttdeci">int sum(T id)</div><div class="ttdoc">Returns the sum of elements in range from 0 to ID.</div><div class="ttdef"><b>Definition</b> fenwick_tree.cpp:90</div></div>
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@@ -425,19 +416,12 @@ template&lt;typename T &gt; </div>
<tr>
<td class="memname">void range_queries::fenwick_tree::update </td>
<td>(</td>
<td class="paramtype">T&#160;</td>
<td class="paramname"><em>id</em>, </td>
<td class="paramtype">T</td> <td class="paramname"><span class="paramname"><em>id</em>, </span></td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">T&#160;</td>
<td class="paramname"><em>val</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
<td class="paramtype">T</td> <td class="paramname"><span class="paramname"><em>val</em></span>&#160;)</td>
</tr>
</table>
</td>
@@ -464,9 +448,9 @@ template&lt;typename T &gt; </div>
<dl class="section return"><dt>Returns</dt><dd>void </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 75</span> {</div>
<div class="line"><span class="lineno"> 76</span> <span class="keywordtype">id</span>++;</div>
<div class="line"><span class="lineno"> 77</span> <span class="keywordflow">while</span> (<span class="keywordtype">id</span> &lt;= <a class="code hl_variable" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#af9f543aa5976b8cc5422490b3d6250c6">n</a>) {</div>
<div class="line"><span class="lineno"> 78</span> <a class="code hl_variable" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#af7b7a8c1c5724ed8683d7e28bef526e6">bit</a>[id] += val;</div>
<div class="line"><span class="lineno"> 79</span> <span class="keywordtype">id</span> += <a class="code hl_function" href="../../de/d0d/classrange__queries_1_1fenwick__tree.html#ab492ebf07cab0e3c32d277ad986de801">offset</a>(<span class="keywordtype">id</span>);</div>
<div class="line"><span class="lineno"> 77</span> <span class="keywordflow">while</span> (<span class="keywordtype">id</span> &lt;= <a class="code hl_variable" href="#af9f543aa5976b8cc5422490b3d6250c6">n</a>) {</div>
<div class="line"><span class="lineno"> 78</span> <a class="code hl_variable" href="#af7b7a8c1c5724ed8683d7e28bef526e6">bit</a>[id] += val;</div>
<div class="line"><span class="lineno"> 79</span> <span class="keywordtype">id</span> += <a class="code hl_function" href="#ab492ebf07cab0e3c32d277ad986de801">offset</a>(<span class="keywordtype">id</span>);</div>
<div class="line"><span class="lineno"> 80</span> }</div>
<div class="line"><span class="lineno"> 81</span> }</div>
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@@ -512,7 +496,7 @@ Here is the call graph for this function:</div>
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