Compilare: main.c: In function 'add': main.c:16:7: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types] p->a = *dest; ^ main.c: In function 'DFS': main.c:35:32: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types] for (p = v[nod]; p != NULL; p = p -> a) { ^ main.c: In function 'citire': main.c:21:2: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d",&n,&m); ^~~~~~~~~~~~~~~~~~~~~~~~~ main.c:25:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d",&x,&y); ^~~~~~~~~~~~~~~~~~~~~~~~~