How to fill in a structure in SI?

Question

C++ / C#

struct student {
  char name[64];
  int marks[5];
};

struct Group {
  struct student* stud;
  int size;
  int id;
};

struct Faculty {
  struct Group* groups;
  int size;
  char faculty[100];
};

struct University {
  struct Faculty* faculties;
  int size;
  char univer[100];
};

int main() {
  struct University* unik = (struct University*)malloc(sizeof(struct University));
  unik->size = 3; 
  unik->faculties = (struct Faculty*)malloc(unik->size * sizeof(struct Faculty));
  unik->faculties->groups = (struct Group*)malloc(2 * sizeof(struct Group));
  unik->faculties->groups->elements = (struct student*)malloc(5 * sizeof(struct student));
  printf("University name ");
  scanf_s("%s", unik->univer, 99);
        ...
  return 0;
}

There is a university structure and it must be somehow filled in main so that there are 3 faculties, each faculty has 2 groups, each group has 5 people.
The question is how to fill it in so that it is not unwieldy. Tried with {}, but gives an error "only one level of curly braces is allowed"