#include <stdio.h>

int main()
{
	static char flag[44444445] = {};
	int i, N, K, S;
	scanf("%d %d", &N, &K);
	for (i = 1; i <= N; i++) {
		scanf("%d", &S);
		flag[S] = 1;
	}
	
	int k, ans = N;
	for (i = 44444444; i >= 0; i--) {
		if (flag[i] == 1) {
			ans--;
			flag[i] = -1;
		}
		if (flag[i] == -1) {
			k = i;
			if (k / 10000000 > 0) {
				flag[i-10000000] = -1;
				k %= 10000000;
			}
			if (k / 1000000 > 0) {
				flag[i-1000000] = -1;
				k %= 1000000;
			}
			if (k / 100000 > 0) {
				flag[i-100000] = -1;
				k %= 100000;
			}
			if (k / 10000 > 0) {
				flag[i-10000] = -1;
				k %= 10000;
			}
			if (k / 1000 > 0) {
				flag[i-1000] = -1;
				k %= 1000;
			}
			if (k / 100 > 0) {
				flag[i-100] = -1;
				k %= 100;
			}
			if (k / 10 > 0) {
				flag[i-10] = -1;
				k %= 10;
			}
			if (k > 0) flag[i-1] = -1;
		}
	}
	printf("%d\n", ans);
	fflush(stdout);
	return 0;
}