Compilare: main.cpp: In function 'int main()': main.cpp:20:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i+z[i]<=s2.size()&&s2[z[i]]==s2[i+z[i]]) ~~~~~~^~~~~~~~~~~ main.cpp:40:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i+z2[i]<=s2.size()&&s2[z2[i]]==s2[i+z2[i]]) ~~~~~~~^~~~~~~~~~~ main.cpp:51:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=s.size()+1;i<s2.size()-s.size()+1;i++) ~^~~~~~~~~~~~~~~~~~~~~ main.cpp:60:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1;i<=(s.size())/2;i++) ~^~~~~~~~~~~~~~