Detect Alternating Pattern

Code

#include <stdio.h>

int is_alternating_pattern(int *mem, int k) {
    int len = 0;
    for(int *p = mem ; p < (mem + k-2) ; p++)
    {
        if(*p == *(p+2))
        {
            len++; 
        }
    }
   return (len == (k - 2)) ? 1 : 0; 

}

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