Compilare: user.cpp: In function ‘void afis(int*)’: user.cpp:14:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < S.size(); ++i) ^ user.cpp: In function ‘void build_Z_array(int*)’: user.cpp:21:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < S.size(); ++i) ^ user.cpp:26:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(R < S.size() && S[R - L] == S[R]) ^ user.cpp:39:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(R < S.size() && S[R - L] == S[R]) ^