Compilare: user.cpp:112:3: warning: no newline at end of file user.cpp: In function 'void solve()': user.cpp:35: warning: comparison between signed and unsigned integer expressions user.cpp:53: warning: comparison between signed and unsigned integer expressions user.cpp:55: warning: comparison between signed and unsigned integer expressions user.cpp:65: warning: comparison between signed and unsigned integer expressions user.cpp:21: warning: unused variable 'j'