Compilare: user.cpp: In function ‘int* pattern(std::string)’: user.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < s.size()) { ^ user.cpp: In function ‘std::vector<int> KMP(std::string, std::string)’: user.cpp:41:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < t.size()) { ^ user.cpp:46:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j == s.size()) { ^ user.cpp:49:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] } else if (i < t.size() && t[i] != s[j]) { ^