I need help completing this c code and understanding it please. Thank you.

8) (15 pts) Complete the program below so that it prints out all the permutations of 0,1,2,SIZE-1 such that the absolute value of the difference between each pair of adjacent numbers in the permutations is 2 or greater. For example, when SIZE 4, the code would print out: 1 3 0 2 2 0 3 1 the only 2 permutations such that the absolute value of the difference between each pair of adjacent terms is 2 or greater #include tinclude #defin SIZE 4 void printPerms (int perm, int used, int k, int n) void print (int perm, int n) int main) int perm [SIZE], used [SIZE], 1; for (i=0; SIZE; i++) used [i] = printPerms (perm, used, 0, SIZE) return 0; 0; void printPerms (int perm, int used, int k, int n) if ( ) print (perm, n); int i; for (i-0 i<:>