Detect Alternating Pattern

Code

#include <stdio.h>

int is_alternating_pattern(int *mem, int k) {
    int* curr = mem;
    int* expected = curr;
    for(int i = 0; i < k; ++i) {
        if (*curr != *expected) {
            return 0;
        }
        *expected = 1 - *expected;
        curr++;
    } 
    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