Compilare: user.cpp: In function 'void DF(int)': user.cpp:19: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int LCA(int, int)': user.cpp:45: warning: control reaches end of non-void function user.cpp: In function 'int main()': user.cpp:53: warning: 'maxb' may be used uninitialized in this function user.cpp:53: warning: 'maxa' may be used uninitialized in this function