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;
    int i = 0;
    while (i < k){
        if (i % 2 == 0){
            if (*(mem + i) != *p1) return 0;
            i++; 
        }
        else{
            if (*(mem + i) != *p2) return 0;
            i++; 
        }
    }
    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