Compilare: user.cpp: In function ‘void Read()’: user.cpp:32:11: warning: unused variable ‘x’ [-Wunused-variable] int i,x,y,r; ^ user.cpp:32:13: warning: unused variable ‘y’ [-Wunused-variable] int i,x,y,r; ^ user.cpp:32:15: warning: unused variable ‘r’ [-Wunused-variable] int i,x,y,r; ^ user.cpp: In function ‘void Solve()’: user.cpp:60:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^