Compilare: user.cpp: In function ‘void dfs1(int)’: user.cpp:17:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<g[v].size();i++) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:26:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gr[v].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:53:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<scc[i].size();j++)cout<<scc[i][j]<<' '; ^