Compilare: user.cpp: In function ‘int LCA(int, int)’: user.cpp:30: warning: operation on ‘x’ may be undefined user.cpp: In function ‘void Euler(int)’: user.cpp:44: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void Deep(int)’: user.cpp:57: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:90: warning: suggest parentheses around ‘-’ inside ‘<<’ user.cpp:91: warning: suggest parentheses around ‘-’ inside ‘<<’