Compilare: user.cpp: In function ‘void solve()’: user.cpp:89:26: warning: use of ‘ll’ length modifier with ‘f’ type character [-Wformat=] printf("%.6llf\n",MAX); ^ user.cpp: In function ‘double max(double, double, double, double)’: user.cpp:56:1: warning: control reaches end of non-void function [-Wreturn-type] } ^