Detect Alternating Pattern

Code

#include <stdio.h>

int is_alternating_pattern(int *mem, int k) {
    if (k <= 0) return 0;
    for (int i = 0; i < k; i++) {
        // each element must be 0 or 1
        if (mem[i] != 0 && mem[i] != 1) return 0;
        // from second element onward, must differ from previous
        if (i > 0 && mem[i] == mem[i - 1]) 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