Compilare: main.cpp: In function 'int main()': main.cpp:40:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<aleg.size(); ++i) ~^~~~~~~~~~~~ main.cpp:44:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j<aleg[i].a.size(); ++j) ~^~~~~~~~~~~~~~~~~ main.cpp:60:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0;j<aleg[i].a.size();++j) ~^~~~~~~~~~~~~~~~~