Compilare: user.cpp: In function ‘int bs(int)’: user.cpp:9:32: warning: unused variable ‘last’ [-Wunused-variable] int st=0,dr=v.size()-1,med,last; ^ user.cpp: In function ‘int main()’: user.cpp:32:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<v.size(); i++) ^