Compilare: main.cpp:1:9: warning: #pragma once in main file #pragma once ^~~~ main.cpp: In function 'int checkEulerian()': main.cpp:35:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < deg.size(); i++) { ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:90:12: warning: unused variable 'w' [-Wunused-variable] int x, y, w; ^