Compilare: main.cpp: In function 'void dfs(int)': main.cpp:28:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int t=0;t<ve[nod].size();t++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:38:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&c,&n,&m); ^ main.cpp:41:42: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&v[i].a,&v[i].b); ^