Compilare: user.cpp: In function ‘void CommonStrings(std::string, int, std::vector<int>&)’: user.cpp:67:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( q == B.size() ) ^ user.cpp:80:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( v[pos] || (j < B.size() && pos + j <= N && s[pos + j] == B[j]) ) ^ user.cpp:91:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( j < B.size() && pos + j <= N && s[pos + j] == B[j] ) ^