結果
問題 | No.506 限られたジャパリまん |
ユーザー |
|
提出日時 | 2017-04-21 22:30:51 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 180 ms / 2,000 ms |
コード長 | 4,736 bytes |
コンパイル時間 | 5,881 ms |
コンパイル使用メモリ | 86,088 KB |
実行使用メモリ | 56,776 KB |
最終ジャッジ日時 | 2024-06-28 04:09:03 |
合計ジャッジ時間 | 6,758 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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ファイルパターン | 結果 |
---|---|
other | AC * 25 |
ソースコード
package contest170421;import java.io.ByteArrayInputStream;import java.io.IOException;import java.io.InputStream;import java.io.PrintWriter;import java.util.Arrays;import java.util.InputMismatchException;public class C {InputStream is;PrintWriter out;String INPUT = "";void solve(){int n = ni()+1, m = ni()+1, K = ni(), P = ni();boolean[][] g = new boolean[n][m];int[] ar = new int[K];int[] ac = new int[K];String[] names = new String[K];for(int i = 0;i < K;i++){ar[i] = ni();ac[i] = ni();names[i] = ns();g[ar[i]][ac[i]] = true;}double maxd = 0;long best = 0;int bestptn = 0;for(int i = 0;i < 1<<K;i++){if(Integer.bitCount(i) == P){for(int j = 0;j < K;j++){if(i<<~j<0){g[ar[j]][ac[j]] ^= true;}}double c = countd(g);if(c > maxd){maxd = c;best = count(g);bestptn = i;}for(int j = 0;j < K;j++){if(i<<~j<0){g[ar[j]][ac[j]] ^= true;}}}}out.println(best);for(int j= 0;j < K;j++){if(bestptn<<~j<0){out.println(names[j]);}}}int mod = 1000000007;long count(boolean[][] g){int n = g.length;int m = g[0].length;int[][] dp = new int[n][m];if(g[0][0]){return 0L;}dp[0][0] = 1;for(int i = 0;i < n;i++){for(int j = 0;j < m;j++){if(i == 0 && j == 0)continue;if(g[i][j])continue;if(j-1 >= 0){dp[i][j] += dp[i][j-1];}if(i-1 >= 0){dp[i][j] += dp[i-1][j];}if(dp[i][j] >= mod){dp[i][j] -= mod;}}}return dp[n-1][m-1];}double countd(boolean[][] g){int n = g.length;int m = g[0].length;double[][] dp = new double[n][m];if(g[0][0]){return 0.;}dp[0][0] = 1;for(int i = 0;i < n;i++){for(int j = 0;j < m;j++){if(i == 0 && j == 0)continue;if(g[i][j])continue;if(j-1 >= 0){dp[i][j] += dp[i][j-1];}if(i-1 >= 0){dp[i][j] += dp[i-1][j];}}}return dp[n-1][m-1];}void run() throws Exception{is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());out = new PrintWriter(System.out);long s = System.currentTimeMillis();solve();out.flush();if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");// Thread t = new Thread(null, null, "~", Runtime.getRuntime().maxMemory()){// @Override// public void run() {// long s = System.currentTimeMillis();// solve();// out.flush();// if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");// }// };// t.start();// t.join();}public static void main(String[] args) throws Exception { new C().run(); }private byte[] inbuf = new byte[1024];public int lenbuf = 0, ptrbuf = 0;private int readByte(){if(lenbuf == -1)throw new InputMismatchException();if(ptrbuf >= lenbuf){ptrbuf = 0;try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }if(lenbuf <= 0)return -1;}return inbuf[ptrbuf++];}private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); }private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; }private double nd() { return Double.parseDouble(ns()); }private char nc() { return (char)skip(); }private String ns(){int b = skip();StringBuilder sb = new StringBuilder();while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ')sb.appendCodePoint(b);b = readByte();}return sb.toString();}private char[] ns(int n){char[] buf = new char[n];int b = skip(), p = 0;while(p < n && !(isSpaceChar(b))){buf[p++] = (char)b;b = readByte();}return n == p ? buf : Arrays.copyOf(buf, p);}private int[] na(int n){int[] a = new int[n];for(int i = 0;i < n;i++)a[i] = ni();return a;}private long[] nal(int n){long[] a = new long[n];for(int i = 0;i < n;i++)a[i] = nl();return a;}private char[][] nm(int n, int m) {char[][] map = new char[n][];for(int i = 0;i < n;i++)map[i] = ns(m);return map;}private int[][] nmi(int n, int m) {int[][] map = new int[n][];for(int i = 0;i < n;i++)map[i] = na(m);return map;}private int ni() { return (int)nl(); }private long nl(){long num = 0;int b;boolean minus = false;while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));if(b == '-'){minus = true;b = readByte();}while(true){if(b >= '0' && b <= '9'){num = num * 10 + (b - '0');}else{return minus ? -num : num;}b = readByte();}}private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); }}