Compilare: user.cpp: In function ‘int main()’: user.cpp:15:9: warning: unused variable ‘sol’ [-Wunused-variable] int sol = 0, x1 = -1, x2 = -1, x, y; ^ user.cpp:15:18: warning: unused variable ‘x1’ [-Wunused-variable] int sol = 0, x1 = -1, x2 = -1, x, y; ^ user.cpp:15:27: warning: unused variable ‘x2’ [-Wunused-variable] int sol = 0, x1 = -1, x2 = -1, x, y; ^ user.cpp:15:39: warning: variable ‘y’ set but not used [-Wunused-but-set-variable] int sol = 0, x1 = -1, x2 = -1, x, y; ^