Compilare: main.cpp: In function 'void prefix()': main.cpp:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<A.size();j++) ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:34:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<B.size();j++) ~^~~~~~~~~ main.cpp:40:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==A.size()-1 && sol.size()<1000) ~^~~~~~~~~~~~ main.cpp:47:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<minn(sol.size(),1000);i++) ^