Compilare: user.cpp: In function ‘int main()’: user.cpp:29:33: warning: unused variable ‘secv’ [-Wunused-variable] int n , A[4001] , B[4001] , secv = 1 , l = 1 , lmax = 0 , s = 0 , smax = 0 , sm = 0 , x , y , pr = 1 ; ^ user.cpp:29:64: warning: variable ‘s’ set but not used [-Wunused-but-set-variable] int n , A[4001] , B[4001] , secv = 1 , l = 1 , lmax = 0 , s = 0 , smax = 0 , sm = 0 , x , y , pr = 1 ; ^ user.cpp:29:72: warning: unused variable ‘smax’ [-Wunused-variable] int n , A[4001] , B[4001] , secv = 1 , l = 1 , lmax = 0 , s = 0 , smax = 0 , sm = 0 , x , y , pr = 1 ; ^ user.cpp:51:30: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << pr << " " << x - y << " " << sm ; ^ user.cpp:51:30: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized]