Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:20:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < fii[nod].size(); ++i) { ^ user.cpp: In function ‘int main()’: user.cpp:57:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < tati[st[i]].size(); ++j) { ^ user.cpp:74:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < st.size(); ++i) { ^ user.cpp:77:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < fii[st[i]].size(); ++j) { ^ user.cpp:64:18: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] path[st[i]] = p; ^