Detect Alternating Pattern

Code

#include <stdio.h>

int is_alternating_pattern(int *mem, int k) {
    // Write your pointer logic here
    int *ptr1 = mem;
    int *ptr2 = mem+1;
    int *ptr3 = mem+2;
    int *ptr4 = mem+3;

    for(int i=0;i<k;i++)
    {
        if(*ptr1 == *ptr3 && (i < k-2))
            return 1;
    }
    return 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