Compilare: user.cpp: In function 'void update(int, int)': user.cpp:34: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int cautare(long long int)': user.cpp:48: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:83: warning: comparison between signed and unsigned integer expressions user.cpp:84: warning: overflow in implicit constant conversion