Compilare: main.cpp: In function 'void dfs1(int)': main.cpp:18:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<v[nod].size(); j++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:33:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<vt[nod].size(); j++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:76:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<ans[p[i].second].size(); j++) ~^~~~~~~~~~~~~~~~~~~~~~~~