Compilare: main.cpp: In function 'void dfs(int)': main.cpp:15:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g1[nod].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:49:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<g1[nod].size();j++) ~^~~~~~~~~~~~~~~ main.cpp:66:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<g2[nod].size();j++) ~^~~~~~~~~~~~~~~