60. Detect Alternating Pattern

#include <stdio.h>

int is_alternating_pattern(int *mem, int k) {
    if (k <= 1) return 0;

    int *prev = mem;
    for (unsigned i = 1; i < k; i++) {
        int cur = *(mem + i);

        if ((!(*prev) && cur) ||
            ((*prev) && !cur)) {
            prev++;
            continue;
        }
        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;
}