#include<bits/stdc++.h>
int main()
{
int coin[100];
int dp[10001];
int n,k;
scanf("%d %d",&n,&k);
for(int i=0;i<n;i++){
scanf("%d",&coin[i]);
}
for(int i=1;i<=k;i++)
dp[i] = 10001;
dp[0] = 0;
for(int i=0;i<n;i++){
for(int j=1;j<=k;j++){
if (coin[i] > j)
continue ;
dp[j] = (dp[j] < dp[j - coin[i]] + 1) ? dp[j] : dp[j - coin[i]] + 1;
}
}
if (dp[k] == 10001)
dp[k] = -1;
printf("%d",dp[k]);
}