Compilare: main.cpp: In function 'int main()': main.cpp:32:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<nrc[i].size();j++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs1(int)': main.cpp:53:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[node].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:64:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<gt[node].size();i++) ~^~~~~~~~~~~~~~~~