Compilare: main.cpp: In function 'void fil(int)': main.cpp:62:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int f = 0 ; f < G[x].size() ; f ++) ~~^~~~~~~~~~~~~ main.cpp:63:55: warning: pointer to a function used in arithmetic [-Wpointer-arith] if(!viz[G[x][f]])viz[G[x][f]] = 1, fil[G[x][f]] ; ^ main.cpp:63:55: warning: value computed is not used [-Wunused-value] if(!viz[G[x][f]])viz[G[x][f]] = 1, fil[G[x][f]] ; ~~~~~~~~~~~^ main.cpp:63:55: warning: value computed is not used [-Wunused-value] main.cpp: In function 'int main()': main.cpp:69:16: warning: unused variable 'x' [-Wunused-variable] int n, mm, x ; ^