Compilare: main.cpp: In function 'void kmp(const string&, int*)': main.cpp:22:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i < s.size(); ++i) { ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:42:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < b.size(); ++i) { ~~^~~~~~~~~~ main.cpp:55:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < b.size(); ++i) { ~~^~~~~~~~~~ main.cpp:63:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= b.size() - a.size(); ++i) { ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:74:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= a.size() / 2; ++i) ~~^~~~~~~~~~~~~~~