Compilare: user.cpp: In function 'void prelucreaza(int, int, int)': user.cpp:47: warning: operation on 'a' may be undefined user.cpp: In function 'void df(int, int, int)': user.cpp:65: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void df2(int)': user.cpp:78: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void solve()': user.cpp:100: warning: unused variable 'nod2'