Compilare: main.cpp: In function 'void dfs(int)': main.cpp:25:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<lista[nod].size(); i++) ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:38:13: warning: unused variable 'x' [-Wunused-variable] int x,y,c; ^ main.cpp:38:15: warning: unused variable 'y' [-Wunused-variable] int x,y,c; ^ main.cpp:38:17: warning: unused variable 'c' [-Wunused-variable] int x,y,c; ^