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 ‘void rev(int)’: user.cpp:30:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < tati[nod].size(); ++i) { ^ user.cpp: In function ‘int main()’: user.cpp:73:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < tati[st[i]].size(); ++j) { ^ user.cpp:80:18: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] path[st[i]] = p; ^