Compilare: user.cpp: In function ‘int main()’: user.cpp:47:6: warning: variable ‘s1’ set but not used [-Wunused-but-set-variable] int s1 = 1, s2 = n - 1; ^ user.cpp:47:14: warning: variable ‘s2’ set but not used [-Wunused-but-set-variable] int s1 = 1, s2 = n - 1; ^