... if(kiemtrahoanthien(a[i]) == 1) { return i; } } return -1; } int TimHoanThienBeNhat(int a[], int n, int ViTriHoanThienDau) { int HoanThienMin = a[ViTriHoanThienDau]; for (int i = ViTriHoanThienDau + 1; i < n; i++) ... printf("%4d", a[i]); } } int kiemtrahoanthien(int n) { int i = 1; int S = 0; while(i < n) { if(n % i == 0) { S = S + i; } i++; } if(S == n) return 1; else return 0; } int timvitrisohoanthiendau(int a[], ... n); xuat(a, n); int vitrihoanthiendau = timvitrisohoanthiendau(a, n); if(vitrihoanthiendau == -1) { printf("\nmang khong co so hoan thien"); } else { printf("\nVi tri hoan thien dau la %d", vitrihoanthiendau);...