Compilare: user.cpp: In function ‘void CommonStrings(std::string, int, std::vector<int>&)’: user.cpp:71:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( j < B.size() && pos + j <= N && s[pos + j] == B[j] ) ^ user.cpp:82:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( j < B.size() && pos + j <= N && s[pos + j] == B[j] ) ^ user.cpp:64:9: warning: unused variable ‘q’ [-Wunused-variable] int q{0}; ^