Compilare: user.cpp: In function ‘void afis2(int, int)’: user.cpp:42:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = cost[x][prv[conf][x]]; i < S2[x].size(); ++i) ^ user.cpp: In function ‘void kmp_fail(std::__cxx11::string)’: user.cpp:52:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < s.size(); ++i) ^ user.cpp: In function ‘std::vector<std::__cxx11::basic_string<char> > prune()’: user.cpp:76:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(k + m < S[j].size()) ^ user.cpp:80:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == S[i].size() - 1) ^ user.cpp: In function ‘int potrivire(std::__cxx11::string, std::__cxx11::string)’: user.cpp:112:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(k + m < b.size()) ^ user.cpp: In function ‘int main()’: user.cpp:167:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(d[i][j] > d[i ^ (1<<j)][k] + S2[j].size() - cost[j][k]) ^