Compilare: user.c: In function ‘main’: user.c:20:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.c:37:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]); ^ user.c:101:13: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] ap[v[k]]--; ^