Compilare: main.cpp: In function 'bool isincluded(const string&, const string&)': main.cpp:31:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i < needle.size(); i ++) { ~~^~~~~~~~~~~~~~~ main.cpp:49:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < haystack.size(); i ++) { ~~^~~~~~~~~~~~~~~~~ main.cpp:59:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == needle.size() - 1) ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int computekmp(const string&, const string&)': main.cpp:83:22: 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:261:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = toskip; j < words[ans[i]].size(); j ++) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:251:20: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] mask ^= (1 << cnode); ~~~^~~~~~~~~