60. Detect Alternating Pattern

#include <stdio.h>

int is_alternating_pattern(int *mem, int k) {
    int sta;
    if (*(mem) > *(mem + 1)){ sta = 0;}
    else if (*(mem) == *(mem + 1)) return 0;
    else{ sta = 1;}
    
    for (int i = 1; i < k - 1; i++){
        if (sta == 1){
            if (*(mem + i) < *(mem + i + 1)) return 0;
            else sta = 0;
        }
        else{
            if (*(mem + i) > *(mem + i + 1)) return 0;
            else sta = 1;
        }
        if (i == k - 2) return 1;
    }
    return 0;
}

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;
}