Compilare: user.cpp: In constructor ‘SuffixArrays::SuffixArrays(const string&)’: user.cpp:22:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] long log=0; while(1<<(log+1) <= S.size()) log++; log++; ^ user.cpp:26:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<S.size();i++) pr[0][i] = S[i]-'a'; ^ user.cpp:29:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<pr.size();i++){ ^ user.cpp:30:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<S.size();j++){ ^ user.cpp:31:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j+(1<<(i-1)) < S.size()) ^ user.cpp:39:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<T.size();j++){ ^