Detect Alternating Pattern

Code

#include <stdio.h>

int is_alternating_pattern(int *mem, int k) {
    // Write your pointer logic here
    int idxEven = *(mem);
    int idxOdd = *(mem + 1);

    if (idxEven == idxOdd) return 0;

    for (int i = 2; i < k; i++){
        if (i % 2 == 0){
            if (*(mem + i) != idxEven) return 0;
        }
        else {
            if (*(mem + i) != idxOdd) 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