Compilare: user.cpp: In function ‘int main()’: user.cpp:21:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k = 1; k < s.size(); k++) { ^ user.cpp:26:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < s.size() && s[i] == s[j]) i++, j++; ^ user.cpp:45:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < s.size() && s[i] == s[j]) i++, j++; ^ user.cpp:57:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<s.size(); i++) ^ user.cpp:58:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(Z[i] >= a.size() && i >= a.size()) cnt++; ^ user.cpp:58:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(Z[i] >= a.size() && i >= a.size()) cnt++; ^ user.cpp:62:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<s.size(); i++) ^ user.cpp:63:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(cnt && Z[i] >= a.size() && i >= a.size()) ^ user.cpp:63:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(cnt && Z[i] >= a.size() && i >= a.size()) ^