Compilare: main.cpp: In function 'int main()': main.cpp:13:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < A.size(); i++) { ~~^~~~~~~~~~ main.cpp:21:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<B.size()){ ~^~~~~~~~~ main.cpp:26:7: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==A.size()){ ~^~~~~~~~~~ main.cpp:29:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] }else if(i<B.size() && A[j]!=B[i]){ ~^~~~~~~~~