Compilare: main.cpp: In function 'int main()': main.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i < A.size(); i++) ~~^~~~~~~~~~ main.cpp:37:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < B.size(); i++) ~~^~~~~~~~~~ main.cpp:45:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j == A.size()) ~~^~~~~~~~~~~