Eroare de compilare: main.cpp: In constructor 'arbint::arbint(int)': main.cpp:45:29: error: 'log2' was not declared in this scope int lg = ceil(log2(n)); ^ main.cpp:45:30: error: 'ceil' was not declared in this scope int lg = ceil(log2(n)); ^ main.cpp:46:28: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] arb.resize(1 << lg + 1); ~~~^~~ main.cpp: In member function 'void arbint::Nod::Init(const arbint::Nod&, const arbint::Nod&)': main.cpp:82:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < v.size(); ++i) ~~^~~~~~~~~~ main.cpp: In member function 'int arbint::Nod::GetValInd(int)': main.cpp:115:17: warning: unused variable 'ret' [-Wunused-variable] int ret = -1; ^~~ Non zero exit status: 1