Compilare: user.cpp: In function ‘int main()’: user.cpp:19:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<=B.size()-A.size()+1;i++){ ^ user.cpp:20:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<A.size();j++){ ^ user.cpp:33:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<C.size();i++){ ^