Compilare: main.cpp: In function 'bool bfs()': main.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<L[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp:16:21: warning: unused variable 'i' [-Wunused-variable] int gasit=0,nod,i,vecin; ^ main.cpp: In function 'int main()': main.cpp:55:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<L[n].size();i++){ ~^~~~~~~~~~~~