#include <bits/stdc++.h>
using namespace std;

using i8 = int8_t;
using i16 = int16_t;
using i32 = int32_t;
using i64 = int64_t;
using isize = ptrdiff_t;
using u8 = uint8_t;
using u16 = uint16_t;
using u32 = uint32_t;
using u64 = uint64_t;
using usize = size_t;
using f32 = float_t;
using f64 = double_t;

inline constexpr i32 Modulus = 1e9 + 7;

template <typename TScalar, typename... TRest>
inline constexpr TScalar Min(TScalar first, TRest... rest)
{
    static_assert((is_same_v<TScalar, TRest> && ...), "All arguments must have the same type");
    if constexpr (sizeof...(rest) == 0)
        return first;
    else
        return (first < Min(rest...)) ? first : Min(rest...);
}

int main(void)
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

    usize n;
    cin >> n;

    u32 x;
    cin >> x;

    vector<u32> coins(n);
    for (usize index = 0; index < n; index += 1)
    {
        cin >> coins[index];
    }

    constexpr u32 MaxNumOfCoins = 1e6 + 17;
    vector<u32> dp(x + 1, MaxNumOfCoins);
    dp[0] = 0;

    for (const u32& coin : coins)
    {
        for (u32 sum = coin; sum <= x; sum += 1)
        {
            dp[sum] = Min(dp[sum], dp[sum - coin] + 1);
        }
    }

    cout << static_cast<i32>((dp[x] != MaxNumOfCoins) ? dp[x] : -1);

    return 0;
}