Detect Alternating Pattern

Code

#include <stdio.h>

int is_alternating_pattern(int *mem, int k) {
    int a = *(mem);
    int b = *(mem+1);
    for(int i = 2; i < k; i++){
        if(i%2==0){
            if(a != *(mem+i))
                return false;
        }else{
            if(b != *(mem+i))
                return false;
        }
    }
    return true;
}

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