Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:16:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<g[nod1].size();i++) { ~^~~~~~~~~~~~~~~ main.cpp:19:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<g[nod2].size();j++) { ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:42:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<g[i].size();j++) ~^~~~~~~~~~~~