Compilare: user.cpp: In function 'int main()': user.cpp:72: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void BF(int)': user.cpp:108: warning: unused variable 'i' user.cpp: In function 'void restore(int)': user.cpp:141: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int isThere(int)': user.cpp:175: warning: comparison between signed and unsigned integer expressions