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Main.java
51 lines (34 loc) · 1.18 KB
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Main.java
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;
public class Main {
static int n;
static int k;
static int[] coin = new int[101];
static int[] dp = new int[10001];
static final int INF = 100000000;
static {
Arrays.fill(dp, -1);
}
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer(br.readLine());
n = Integer.parseInt(st.nextToken());
k = Integer.parseInt(st.nextToken());
for (int i = 0; i < n; i++) coin[i] = Integer.parseInt(br.readLine());
int ret = solve(0);
System.out.println(ret == INF ? -1 : ret);
}
static int solve(int coinSum) {
if (coinSum == k) return 0;
if (coinSum > k) return INF;
if (dp[coinSum] != -1) return dp[coinSum];
dp[coinSum] = INF;
for (int i = 0; i < n; i++) {
dp[coinSum] = Math.min(dp[coinSum], solve(coinSum + coin[i]) + 1);
}
return dp[coinSum];
}
}