Compilare: main.cpp: In function 'std::vector<int> kmp_table(const string&)': main.cpp:15:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (pos < N) { ~~~~^~~ main.cpp: In function 'std::vector<int> kmp_search(const string&, const string&, int)': main.cpp:37:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j < S.size()) { ~~^~~~~~~~~~ main.cpp:40:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (k == W.size()) { ~~^~~~~~~~~~~ main.cpp:42:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (P.size() == MAXN) ~~~~~~~~~^~~~~~~