Compilare: main.cpp: In function 'int main()': main.cpp:22:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<s.size(); ++i) ~^~~~~~~~~ main.cpp:27:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i+(manacher[i]-1)/2+1 < s.size() and i-(manacher[i]-1)/2-1>=1 and s[i+(manacher[i]-1)/2+1]== s[i-(manacher[i]-1)/2-1]) ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~ main.cpp:35:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i+(manacher[i]-1)/2+1 < s.size() and i-(manacher[i]-1)/2-1>=1 and s[i+(manacher[i]-1)/2+1] == s[i-(manacher[i]-1)/2-1]) ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~ main.cpp:41:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<s.size(); ++i) ~^~~~~~~~~