Compilare: main.cpp: In function 'int main()': main.cpp:80:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < axaX.size(); i++) ~~^~~~~~~~~~~~~ main.cpp:84:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < axaY.size(); j++) ~~^~~~~~~~~~~~~ main.cpp:88:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < special.size(); i++) ~~^~~~~~~~~~~~~~~~