Compilare: user.cpp: In function ‘short int GetDist(short int, short int)’: user.cpp:21:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<S[x].size();i++) ^ user.cpp:22:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<S[y].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:43:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pos<T.size()) ^ user.cpp:46:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pos<T.size()&&!isalpha(T[pos])) ^ user.cpp:48:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pos<T.size()&&isalpha(T[pos])) ^