Compilare: user.cpp: In function ‘int main()’: user.cpp:5:21: warning: integer overflow in expression [-Woverflow] #define inf (2<<30)-1 ^ user.cpp:45:17: note: in expansion of macro ‘inf’ cost[i]=inf; ^ user.cpp:5:21: warning: integer overflow in expression [-Woverflow] #define inf (2<<30)-1 ^ user.cpp:49:21: note: in expansion of macro ‘inf’ if(cost[i]==inf) ^ user.cpp:42:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^