Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:20:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < muchii[node].size(); ++i) { ^ user.cpp: In function ‘int main()’: user.cpp:40:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < order.size(); ++i) { ^