Compilare: user.cpp: In function ‘int main()’: user.cpp:52:8: warning: unused variable ‘b’ [-Wunused-variable] bool b; ^ user.cpp:75:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < xs.size(); ++i){ ^ user.cpp:81:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < xs.size(); ++i){ ^ user.cpp:91:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz == xs.size()){ ^ user.cpp:98:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz2 < drs.size() && drs[poz2].there(x, y)){ ^ user.cpp:100:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(poz2 > 0 && poz2 <= drs.size() && drs[poz2-1].there(x, y)){ ^ user.cpp:34:7: warning: variable ‘inv_cmp’ set but not used [-Wunused-but-set-variable] auto inv_cmp = [&](const dreapta& a, const dreapta& b){ ^