（Educational Codeforces Round 9）Thief in a Shop（dp）

Thief in a Shop

time limit per test5 seconds
memory limit per test512 megabytes
inputstandard input
outputstandard output
A thief made his way to a shop.

As usual he has his lucky knapsack with him. The knapsack can contain k objects. There are n kinds of products in the shop and an infinite number of products of each kind. The cost of one product of kind i is ai.

The thief is greedy, so he will take exactly k products (it’s possible for some kinds to take several products of that kind).

Find all the possible total costs of products the thief can nick into his knapsack.

Input

The first line contains two integers n and k (1 ≤ n, k ≤ 1000) — the number of kinds of products and the number of products the thief will take.

The second line contains n integers ai (1 ≤ ai ≤ 1000) — the costs of products for kinds from 1 to n.

Output

Print the only line with all the possible total costs of stolen products, separated by a space. The numbers should be printed in the ascending order.

Examples

input

3 2
1 2 3

output

2 3 4 5 6

input

5 5
1 1 1 1 1

output

5

input

3 3
3 5 11

output

9 11 13 15 17 19 21 25 27 33

题意
有n个数，然后这n个数里面选k个加起来
问你一共能加出来多少种

题解：
多项式加法，加k次，问你最后的数是哪些。
DP。dp[i]表示最少用多少个非a[1]能够构成a[1]*k+i的。

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

int a[1010], dp[1000005], done[1010]={0};

int main()
{
    int mod = 1e9;
    fill( dp + 1, dp + 1000001 , mod);
    int n ,k, mn = mod, mx = 0;
    cin >> n >> k;
    for(int i=1;i<=n;++i)
    {
        cin >> a[i];
        mn = min( mn , a[i]);
        mx = max( mx , a[i]);
    }
    for(int i=1;i<=n;++i)
        a[i] -= mn;

    int t = 0;
    for(int i=1;i<=n;++i)
        if( a[i] != 0)
            a[++t] = a[i];          

    n = t;
    dp[0]=0;
    for(int i = 1; i <= n;++i){
        if( done[a[i]])
            continue;
        done[a[i]] = 1;
        for(int j = 1; j<=mx*k;++j){
            if(j>=a[i])
                if(dp[j] > dp[j-a[i]] + 1)
                    dp[j] = dp[j-a[i]] + 1;
        }
    }


    for(int i = 0; i <= mx * k; ++i)
        if( dp[i] <= k)
            printf("%d ",mn * k + i);

    return 0;
}