Compilare: user.cpp: In function 'void bf(int, int)': user.cpp:41: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void prepare()': user.cpp:58: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int BF()': user.cpp:82: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void solve()': user.cpp:119: warning: comparison between signed and unsigned integer expressions user.cpp:133: warning: comparison between signed and unsigned integer expressions