ss="lineno">  165</span>&#160;    <span class="keyword">typedef</span> Graph_data_t G;</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;</div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;    <span class="keyword">public</span>:</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;        <span class="keyword">explicit</span> <a c