Detect Alternating Pattern

Code

#include <stdio.h>

int is_alternating_pattern(int *mem, int k) {
    // Write your pointer logic here
    int* p1 = mem;
    int* p2 = mem+1;
    if(k<3)
        return 0;
    while((p1+2)<mem+k && (p2+2)<mem+k){
        if(*p1 != *(p1+2))
            return 0;
        if(k>=4 && *p2 != *(p2+2))
            return 0;
        p1+=2;
        p2+=2;
    }
    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