Compilare: main.cpp: In function 'bool isincluded(std::__cxx11::string, std::__cxx11::string)': main.cpp:16:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i < needle.size(); i ++) { ~~^~~~~~~~~~~~~~~ main.cpp:25:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < haystack.size(); i ++) { ~~^~~~~~~~~~~~~~~~~ main.cpp:30:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == needle.size() - 1) ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int computekmp(std::__cxx11::string, std::__cxx11::string)': main.cpp:42:22: 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:121:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = toskip; j < words[ans[i]].size(); j ++) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:84:18: warning: variable 'x' set but not used [-Wunused-but-set-variable] int mx = -1, x, y; ^ main.cpp:116:20: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] mask ^= (1 << cnode); ~~~^~~~~~~~~