Compilare: user.cpp: In function ‘int main()’: user.cpp:40:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < str.size(); ++i) if (z[i] == pat.size()) ^ user.cpp:40:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < str.size(); ++i) if (z[i] == pat.size()) ^ user.cpp:44:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < 1000 && i < ans.size(); ++i) ^