Compilare: user.cpp: In function ‘int extract()’: user.cpp:18:50: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] while((i<<1<=lhp&&vl[hp[i]]>vl[hp[i<<1]])||(i<<1+1<=lhp&&vl[hp[i]]>vl[hp[i<<1]])){ ^ user.cpp:19:57: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] if(vl[hp[i]]>vl[hp[i<<1]]&&(vl[hp[i<<1]]<vl[hp[i<<1+1]]||i<<1+1>lhp)){ ^ user.cpp:19:67: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] if(vl[hp[i]]>vl[hp[i<<1]]&&(vl[hp[i<<1]]<vl[hp[i<<1+1]]||i<<1+1>lhp)){ ^ user.cpp:26:23: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] hp[i]=hp[i<<1+1]; ^ user.cpp:27:17: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] hp[i<<1+1]=aux; ^ user.cpp: In function ‘int main()’: user.cpp:65:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[nod].size();i++) ^