Detect Alternating Pattern

Code

#include <stdio.h>

int is_alternating_pattern(int *mem, int k) {
    // Write your pointer logic here
    int first_element, second_element;
    first_element = *mem;
    second_element = *(mem+2);
    for(int i=0; i<k/2; i++){
        if(first_element != second_element){
            return 0;
        }
        first_element++;
        second_element++;
    }
    return 1;
}

int main() {
    int n, k, arr[100];
    scanf("%d %d", &n, &k);

    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    int res = is_alternating_pattern(arr, k);
    printf("%d", res);

    return 0;
}

Solving Approach