Compilare: user.cpp: In function ‘int cauta(int)’: user.cpp:16:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(step=1;step<=s.size();step*=2); ^ user.cpp:18:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(step+j<s.size()) ^ user.cpp: In function ‘void cadran(std::vector<std::pair<int, int> >)’: user.cpp:27:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<a.size();i++) ^ user.cpp:28:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(cauta(a[i].s)==s.size()) ^ user.cpp: In function ‘int main()’: user.cpp:50:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<b.size();i++) ^ user.cpp:54:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<c.size();i++){ ^ user.cpp:60:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<d.size();i++) ^