Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:85:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[node].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:134:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[st[j]].size(); i++) ^ user.cpp:152:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[u].size(); i++) ^