Compilare: main.cpp: In function 'void go_visit(int, int)': main.cpp:20:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:30:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:45:18: 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:97:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<line.size();i++) ~^~~~~~~~~~~~ main.cpp:102:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<line.size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'void go_visit(int, int)': main.cpp:52:19: warning: 'which' may be used uninitialized in this function [-Wmaybe-uninitialized] nod[pos][which].second=line.size()-1; ^