Compilare: user.cpp: In function ‘void read()’: user.cpp:33: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void solve()’: user.cpp:44: warning: unused variable ‘cw’ user.cpp:44: warning: unused variable ‘la’ user.cpp:44: warning: unused variable ‘i’ user.cpp:44: warning: unused variable ‘l’ user.cpp:44: warning: unused variable ‘k’ user.cpp:44: warning: unused variable ‘lc’ user.cpp:44: warning: unused variable ‘lp’ user.cpp:45: warning: unused variable ‘S’