Compilare: main.cpp: In function 'int main()': main.cpp:34:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < diviz.size(); ++ i){ ~~^~~~~~~~~~~~~~ main.cpp:35:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < diviz.size(); ++ j){ ~~^~~~~~~~~~~~~~