Compilare: user.cpp: In function ‘int main()’: user.cpp:21:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=1; k<s.size(); k++) { ^ user.cpp:27:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < s.size() && s[i] == s[j]) Z[k]++, i++, j++; ^ user.cpp:41:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < s.size() && s[i] == s[j]) Z[k]++, i++, j++; ^ user.cpp:56:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=a.size(); i<s.size(); i++) ^ user.cpp:57:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(Z[i] >= a.size()) sol++; ^ user.cpp:61:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=a.size(); i<s.size() && sol; i++) ^ user.cpp:62:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(Z[i] >= a.size()) g<<i-a.size()<<" ", sol--; ^