Detect Alternating Pattern

Code

#include <stdio.h>

int is_alternating_pattern(int *mem, int k) {
    // Write your pointer logic here
    if (k <= 1) {
        return 1;
    }

    if (*mem == *(mem + 1)) {
        return 0;
    }

    for (int i = 2; i < k; ++i) {
        if (*(mem + i) != *(mem + i - 2)) 
        {
            return 0;
        }
    }

    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