Compilare: main.cpp: In function 'void go_visit(int)': main.cpp:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<elem[where][pos].size();i++) ~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:18:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:51:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i1=0;i1<elem[where][i].size();i1++) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:52:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j1=0;j1<elem[where][j].size();j1++) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:69:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<nod[i].size();j++) ~^~~~~~~~~~~~~~