Compilare: user.cpp: In function ‘void insert(long int)’: user.cpp:12: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void deelet(long long int)’: user.cpp:24: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘long int find(long int)’: user.cpp:46: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void deelet(long long int)’: user.cpp:22: warning: ‘p’ may be used uninitialized in this function