#include <stdio.h>
#include <stdlib.h>

int mul(int a, int b)
{
    return a * b;
}

int fold(int* array, int n, int (*mul)(int, int))
{
    int result = mul(array[0], array[1]);
    for (int i = 2; i < n; i++)
        result = mul(result, array[i]);
    return result;
}

int main()
{
    int* array;
    int n;
    printf("Enter the size of the array: ");
    scanf("%d", &n);
    array = (int*)malloc(n * sizeof(int*));
    for (int i = 0; i < n; i++)
    {
        printf("Enter array[%d]: ", i);
        scanf("%d", &array[i]);
    }
    printf("Original array: ");
    for (int i = 0; i < n; i++)
        printf("%d ", array[i]);
    printf("\nThe product of all array numbers: %d\n", fold(array, n, mul));
    free(array);
    return 0;