Detect Alternating Pattern

Code

#include <stdio.h>

int is_alternating_pattern(int *mem, int k) {
    int flag = 0;

    for (int i =0; i<k-1 ; i++)  
    {

    if (*(mem+i) == 0)
    {
        if (*(mem+i+1) == 1)
        {
           flag++; 
        } 
        else
        {
            return 0;
            break;
        }
    }
    else if (*(mem+i) == 1)
    {
        if (*(mem+i+1) == 0)
        {
            flag++;
        }
        else 
        {
            return 0;
            break;
        }
    }

}
    if (flag == k-1)
    {
        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