Compilare: user.cpp: In function ‘int df(int)’: user.cpp:20:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<a[actual].size();i++) ^ user.cpp: In function ‘int cauta(int, int)’: user.cpp:34:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[actual].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:88:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[actual].size();i++) ^