Compilare: user.cpp: In function ‘void Euler(int)’: user.cpp:49:66: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (L[node].back() == imp1 || L[node].back() == imp2 && L[node].size() > 1) ^ user.cpp: In function ‘int main()’: user.cpp:107:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < R.size(); i ++) ^ user.cpp:110:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < R[i].size(); j ++) ^