Compilare: main.cpp: In function 'void DFSsolve(int)': main.cpp:30:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<q[Stack[vf]].size();++i) ~^~~~~~~~~~~~~~~~~~~~ main.cpp:37:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[Stack[vf]].index<v[Stack[vf]].sons.size()) ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:42:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<q[Stack[vf]].size();++i) ~^~~~~~~~~~~~~~~~~~~~