Compilare: user.cpp: In function ‘void KMP()’: user.cpp:31:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i+1==b.size()) ^ user.cpp: In function ‘int main()’: user.cpp:66:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a.size();++i) ^ user.cpp:75:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i+m-1<a.size();++i) ^