Compilare: main.cpp: In function 'int main()': main.cpp:28:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i < s.size(); i ++) { ~~^~~~~~~~~~ main.cpp:31:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i + z[i] < s.size() && s[i + z[i]] == s[z[i] + 1]) ~~~~~~~~~^~~~~~~~~~ main.cpp:66:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= target.size() / 2; i ++) ~~^~~~~~~~~~~~~~~~~~~~