Consider the following C program.

#include < stdio.h >
int main () {
    int a [4] [5] = {{1, 2, 3, 4, 5},
                           {6, 7, 8, 9, 10},
                           {11, 12, 13, 14, 15},
                           {16, 17, 18, 19, 20}};
    printf (“%d\n”, *(*(a+**a+2) +3));
    return (0);
}

The output of the program is _______.

A program P reads in 500 integers in the range [0, 100] representing the cores of 500 students. It then print the frequency of each score above 50. What would be the best way for P to store the frequencies?

A single array A[1..MAXSIZE] is used to implement two stacks, The two stacks grow from opposite ends of the array. Variables top1 and top2 (top1 < top2) point to the location of the topmost element in each of the stacks, If the space is to be used efficiently, the condition for "stack full" is

Suppose you are given an array s[1..n] and a procedure reverse (s, i, j) which reverse the order of elements in s between positions i and j (both inclusive). What does the following sequence do, where $$1 \le k < n:$$ reverse (s, 1, k);
reverse (s, k+1, n);
reverse (s, 1, n);