Compilare: user.cpp: In function ‘void torol(std::vector<adat>&, int)’: user.cpp:50:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p*2<x.size() && x[p*2].s<x[poz].s) ^ user.cpp:52:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p*2+1<x.size() && x[p*2+1].s<x[poz].s) ^