Compilare: main.cpp: In function 'void dfsx(int, int, int)': main.cpp:15:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A[node].size();i++){ ~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int, int)': main.cpp:25:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A[node].size();i++){ ~^~~~~~~~~~~~~~~ main.cpp:33:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A[x].size();i++){ ~^~~~~~~~~~~~