Compilare: user.cpp: In function `int main()': user.cpp:85: warning: comparison between signed and unsigned integer expressions user.cpp:87: warning: comparison between signed and unsigned integer expressions user.cpp:95: warning: use of `ll' length modifier with `f' type character user.cpp:18: warning: unused variable `int k' user.cpp:19: warning: unused variable `int c' user.cpp:19: warning: `int min' might be used uninitialized in this function user.cpp:19: warning: `int max' might be used uninitialized in this function user.cpp:19: warning: `int a' might be used uninitialized in this function user.cpp:19: warning: `int b' might be used uninitialized in this function