Compilare: user.cpp: In function ‘int check(int, int, int, int*, long long int*)’: user.cpp:6:22: warning: unused variable ‘last’ [-Wunused-variable] int st, dr, mid, last; ^ user.cpp: In function ‘int main()’: user.cpp:48:16: warning: ‘lastgood’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(val[x] == st) ^