Compilare: main.cpp: In function 'int go_visit(int, int)': main.cpp:12:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int, int, int)': main.cpp:23:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:58:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[x].size();i++) ~^~~~~~~~~~~~~~ main.cpp:87:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ans.size();i++) ~^~~~~~~~~~~ main.cpp: In function 'int go_visit(int, int)': main.cpp:15:1: warning: control reaches end of non-void function [-Wreturn-type] } ^