#include <stdio.h>
#include <malloc.h>

int main() {
    int N;
    printf("Enter the size of array: ");
    scanf("%d", &N);
    int *array_pointers = malloc(N*sizeof(int));
    printf("Enter the elements of array: ");
    for (int *element = array_pointers; element<array_pointers+N; element++){
        scanf("%d", element);
    }
    int mult = 1;
    for (int* element = array_pointers+1; element < array_pointers+N-1; element++){
        if (*(element-1) == *(element+1)){
            mult *= *element;
        }
    }
    printf("mult: %d", mult);
    return 0;
}