結果

問題 No.1284 Flip Game
ユーザー ywmtywmt
提出日時 2020-11-06 22:51:19
言語 Java
(openjdk 23)
結果
AC  
実行時間 132 ms / 2,000 ms
コード長 5,516 bytes
コンパイル時間 2,532 ms
コンパイル使用メモリ 78,160 KB
実行使用メモリ 41,620 KB
最終ジャッジ日時 2024-07-22 13:26:35
合計ジャッジ時間 5,346 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge4
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ファイルパターン 結果
other AC * 28
権限があれば一括ダウンロードができます

ソースコード

diff # 

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.InputMismatchException;
import java.util.NoSuchElementException;

public class Main {
    static PrintWriter out;
    static InputReader ir;

    static void solve() {
        int n = ir.nextInt();
        long[][] c = new long[n][];
        for (int i = 0; i < n; i++)
            c[i] = ir.nextLongArray(n);
        long[][] dp = new long[n][(int) Math.pow(3, n)];
        for (int i = 0; i < n; i++) {
            Arrays.fill(dp[i], 1L << 60);
            dp[i][(int) Math.pow(3, i)] = 0;
        }
        for (int i = 0; i < Math.pow(3, n); i++) {
            int[] bit = new int[n];
            int mask = i;
            int ct = 0;
            for (int j = 0; j < n; j++) {
                bit[j] = mask % 3;
                mask /= 3;
                ct += bit[j];
            }
            for (int j = 0; j < n; j++) {
                if (bit[j] == 0 || dp[j][i] == 1L << 60)
                    continue;
                for (int k = 0; k < n; k++) {
                    if (bit[k] == 2 || j == k)
                        continue;
                    dp[k][i + (int) Math.pow(3, k)] = Math.min(dp[k][i + (int) Math.pow(3, k)], dp[j][i] + c[j][k]);
                }
            }
        }
        long res = 1L << 60;
        for (int i = 0; i < n; i++) {
            res = Math.min(res, dp[i][(int) Math.pow(3, n) - 1]);
            for (int j = 0; j < n; j++) {
                if (i != j)
                    res = Math.min(res, dp[j][(int) Math.pow(3, n) - 1 - (int) Math.pow(3, i) * 2] + c[j][i]);
            }
        }
        out.println(res);
    }

    public static void main(String[] args) {
        ir = new InputReader(System.in);
        out = new PrintWriter(System.out);
        solve();
        out.flush();
    }

    static class InputReader {

        private InputStream in;
        private byte[] buffer = new byte[1024];
        private int curbuf;
        private int lenbuf;

        public InputReader(InputStream in) {
            this.in = in;
            this.curbuf = this.lenbuf = 0;
        }

        public boolean hasNextByte() {
            if (curbuf >= lenbuf) {
                curbuf = 0;
                try {
                    lenbuf = in.read(buffer);
                } catch (IOException e) {
                    throw new InputMismatchException();
                }
                if (lenbuf <= 0)
                    return false;
            }
            return true;
        }

        private int readByte() {
            if (hasNextByte())
                return buffer[curbuf++];
            else
                return -1;
        }

        private boolean isSpaceChar(int c) {
            return !(c >= 33 && c <= 126);
        }

        private void skip() {
            while (hasNextByte() && isSpaceChar(buffer[curbuf]))
                curbuf++;
        }

        public boolean hasNext() {
            skip();
            return hasNextByte();
        }

        public String next() {
            if (!hasNext())
                throw new NoSuchElementException();
            StringBuilder sb = new StringBuilder();
            int b = readByte();
            while (!isSpaceChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            }
            return sb.toString();
        }

        public int nextInt() {
            if (!hasNext())
                throw new NoSuchElementException();
            int c = readByte();
            while (isSpaceChar(c))
                c = readByte();
            boolean minus = false;
            if (c == '-') {
                minus = true;
                c = readByte();
            }
            int res = 0;
            do {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res = res * 10 + c - '0';
                c = readByte();
            } while (!isSpaceChar(c));
            return (minus) ? -res : res;
        }

        public long nextLong() {
            if (!hasNext())
                throw new NoSuchElementException();
            int c = readByte();
            while (isSpaceChar(c))
                c = readByte();
            boolean minus = false;
            if (c == '-') {
                minus = true;
                c = readByte();
            }
            long res = 0;
            do {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res = res * 10 + c - '0';
                c = readByte();
            } while (!isSpaceChar(c));
            return (minus) ? -res : res;
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }

        public int[] nextIntArray(int n) {
            int[] a = new int[n];
            for (int i = 0; i < n; i++)
                a[i] = nextInt();
            return a;
        }

        public long[] nextLongArray(int n) {
            long[] a = new long[n];
            for (int i = 0; i < n; i++)
                a[i] = nextLong();
            return a;
        }

        public char[][] nextCharMap(int n, int m) {
            char[][] map = new char[n][m];
            for (int i = 0; i < n; i++)
                map[i] = next().toCharArray();
            return map;
        }
    }

    static void tr(Object... o) {
        System.err.println(Arrays.deepToString(o));
    }
}
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