Compilare: user.cpp: In function ‘int dfs(int)’: user.cpp:26:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void bellmanf()’: user.cpp:30:9: warning: unused variable ‘costac’ [-Wunused-variable] int costac,drakeac; ^ user.cpp:30:16: warning: unused variable ‘drakeac’ [-Wunused-variable] int costac,drakeac; ^ user.cpp: In function ‘int main()’: user.cpp:54:38: warning: left operand of comma operator has no effect [-Wunused-value] maxdrake=(maxdrake,drake[i]); ^