Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:37:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < L[node].size(); i++) { ^ user.cpp: In function ‘void solve()’: user.cpp:57:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int it = 0; it < L[node].size(); it++) { ^ user.cpp:71:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < T[child].size(); j++) { ^ user.cpp:69:10: warning: unused variable ‘minim’ [-Wunused-variable] int minim = 0; ^