Compilare: main.cpp: In function 'void dfs(int)': main.cpp:35:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[k].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'void dfs1(int)': main.cpp:47:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<gt[k].size();i++) ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:78:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j< g[i].size();i++) ~^~~~~~~~~~~~~ main.cpp:103:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i< gr[act].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:114:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i< grt[act].size();i++) ~^~~~~~~~~~~~~~~~~