#include <stdio.h>
int is_alternating_pattern(int *mem, int k) {
// Crawl backwards over the mem & compare if 2 adjacent values are the same
while (k-- && k > 0){
int *cur_val = mem+k;
int *prev_val = mem+k-1;
//printf("Current val: %d, Prev val: %d, k: %d\n", *cur_val, *prev_val,k);
if(*cur_val == *prev_val){
return 0;
}
}
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;
}