結果
問題 | No.1560 majority x majority |
ユーザー |
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提出日時 | 2021-06-28 13:22:20 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 633 ms / 2,000 ms |
コード長 | 2,372 bytes |
コンパイル時間 | 2,329 ms |
コンパイル使用メモリ | 78,668 KB |
実行使用メモリ | 79,612 KB |
最終ジャッジ日時 | 2024-06-25 12:09:20 |
合計ジャッジ時間 | 11,083 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 5 |
other | AC * 26 |
ソースコード
import java.io.*;import java.util.*;public class Main {static int n;static int m;static boolean[][] votes;static boolean[][] unables;static int[] dp;public static void main(String[] args) throws Exception {Scanner sc = new Scanner();n = sc.nextInt();m = sc.nextInt();votes = new boolean[n][m];for (int i = 0; i < n; i++) {for (int j = 0; j < m; j++) {votes[i][j] = (sc.nextInt() == 1);}}unables = new boolean[1 << m][n];for (int i = 0; i < (1 << m); i++) {for (int j = 0; j < m; j++) {if ((i & (1 << j)) != 0) {continue;}for (int k = 0; k < n; k++) {unables[i][k] |= !votes[k][j];}}}dp = new int[1 << m];Arrays.fill(dp, -1);dp[0] = 1;System.out.println(dfw((1 << m) - 1));}static int dfw(int mask) {if (dp[mask] < 0) {dp[mask] = 0;for (int i = 0; i < m; i++) {if ((mask & (1 << i)) == 0) {continue;}int agree = 0;int against = 0;for (int j = 0; j < n; j++) {if (unables[mask][j]) {continue;}if (votes[j][i]) {agree++;} else {against++;}}if (agree >= against) {dp[mask] += dfw(mask ^ (1 << i));}}}return dp[mask];}}class Scanner {BufferedReader br = new BufferedReader(new InputStreamReader(System.in));StringTokenizer st = new StringTokenizer("");public Scanner() throws Exception {}public int nextInt() throws Exception {return Integer.parseInt(next());}public long nextLong() throws Exception {return Long.parseLong(next());}public String next() throws Exception {if (!st.hasMoreTokens()) {st = new StringTokenizer(br.readLine());}return st.nextToken();}}