結果
問題 | No.1463 Hungry Kanten |
ユーザー |
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提出日時 | 2023-08-04 09:01:31 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 622 ms / 2,000 ms |
コード長 | 2,572 bytes |
コンパイル時間 | 2,779 ms |
コンパイル使用メモリ | 84,700 KB |
実行使用メモリ | 96,468 KB |
最終ジャッジ日時 | 2024-10-14 06:03:04 |
合計ジャッジ時間 | 6,494 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 20 |
ソースコード
import java.io.*;import java.util.*;import java.util.stream.*;import java.math.*;public class Main {public static void main(String[] args) throws Exception {Scanner sc = new Scanner();int n = sc.nextInt();int k = sc.nextInt();int[] values = new int[n];BigInteger[] inputs = new BigInteger[n];for (int i = 0; i < n; i++) {values[i] = sc.nextInt();inputs[i] = BigInteger.valueOf(values[i]);}int[] sums = new int[1 << n];BigInteger[] nums = new BigInteger[1 << n];nums[0] = BigInteger.valueOf(1);HashSet<BigInteger> ans = new HashSet<>();for (int i = 1; i < (1 << n); i++) {for (int j = 0; j < n; j++) {if ((i & (1 << j)) > 0) {sums[i] = sums[i ^ (1 << j)] + values[j];nums[i] = nums[i ^ (1 << j)].multiply(inputs[j]);break;}}if (getPop(i) >= k) {ans.add(BigInteger.valueOf(sums[i]));ans.add(nums[i]);}}System.out.println(ans.size());}static int getPop(int x) {int pop = 0;while (x > 0) {pop += x % 2;x >>= 1;}return pop;}}class Utilities {static String arrayToLineString(Object[] arr) {return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));}static String arrayToLineString(int[] arr) {return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));}}class Scanner {BufferedReader br = new BufferedReader(new InputStreamReader(System.in));StringTokenizer st = new StringTokenizer("");StringBuilder sb = new StringBuilder();public Scanner() throws Exception {}public int nextInt() throws Exception {return Integer.parseInt(next());}public long nextLong() throws Exception {return Long.parseLong(next());}public double nextDouble() throws Exception {return Double.parseDouble(next());}public int[] nextIntArray() throws Exception {return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();}public String next() throws Exception {while (!st.hasMoreTokens()) {st = new StringTokenizer(br.readLine());}return st.nextToken();}}