結果

問題 No.283 スライドパズルと魔方陣
ユーザー 👑 hos.lyric
提出日時 2019-04-26 21:12:32
言語 D
(dmd 2.109.1)
結果
WA  
実行時間 -
コード長 4,626 bytes
コンパイル時間 7,983 ms
コンパイル使用メモリ 319,968 KB
実行使用メモリ 6,944 KB
最終ジャッジ日時 2024-06-22 00:57:12
合計ジャッジ時間 10,668 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge5
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ファイルパターン 結果
other AC * 36 WA * 3
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ソースコード

diff #
プレゼンテーションモードにする

import std.conv, std.functional, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.complex, std.container, std.math, std.numeric, std.range, std.regex, std.typecons;
import core.bitop;
class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens
    .popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }
real readReal() { return readToken.to!real; }
bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }
int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; 
    (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }
int N;
int[][] A;
int calc(in int[][] a) {
  int s;
  int[] perm;
  foreach (x; 0 .. N) {
    if (x % 2 == 0) {
      foreach (y; 0 .. N) {
        if (1 <= a[x][y] && a[x][y] <= N^^2 - 1) {
          perm ~= a[x][y];
        }
      }
    } else {
      foreach_reverse (y; 0 .. N) {
        if (1 <= a[x][y] && a[x][y] <= N^^2 - 1) {
          perm ~= a[x][y];
        }
      }
    }
  }
  foreach (i; 0 .. perm.length) foreach (j; i + 1 .. perm.length) {
    if (perm[i] > perm[j]) {
      s ^= 1;
    }
  }
  return s;
}
void main() {
  try {
    for (; ; ) {
      N = readInt();
      A = new int[][](N, N);
      foreach (x; 0 .. N) foreach (y; 0 .. N) {
        A[x][y] = readInt();
      }
// for(N=3;N<=50;++N){A=new int[][](N,N);
      
      if (N == 2) {
        writeln("impossible");
        continue;
      }
      
      auto a = new int[][](N, N);
      if (N % 4 == 0) {
        foreach (x; 0 .. N) foreach (y; 0 .. N) {
          a[x][y] = x * N + y;
        }
        foreach (x; 0 .. N / 2) foreach (y; 0 .. N) {
          if ((popcnt(x & 3) - popcnt(y & 3)) % 2 != 0) {
            swap(a[x][y], a[N - 1 - x][N - 1 - y]);
          }
        }
      } else if (N % 4 == 2) {
        auto b = new int[][](N / 2, N / 2);
        foreach (i; 0 .. N / 2) foreach (j; 0 .. N / 2) {
          const x = -(N / 2) / 2 + i + j;
          const y = (N / 2) / 2 - i + j;
          b[(x + N / 2) % (N / 2)][(y + N / 2) % (N / 2)] = i * (N / 2) + j;
        }
        foreach (x; 0 .. N / 2) foreach (y; 0 .. N / 2) {
          int[][] c;
          if (x < (N / 2) / 2) {
            c = [[3, 0], [1, 2]];
          } else if (x == (N / 2) / 2) {
            c = (y != (N / 2) / 2) ? [[3, 0], [1, 2]] : [[0, 3], [1, 2]];
          } else if (x == (N / 2) / 2 + 1) {
            c = (y == (N / 2) / 2) ? [[3, 0], [1, 2]] : [[0, 3], [1, 2]];
          } else {
            c = [[0, 3], [2, 1]];
          }
          foreach (dx; 0 .. 2) foreach (dy; 0 .. 2) {
            a[x * 2 + dx][y * 2 + dy] = b[x][y] * 4 + c[dx][dy];
          }
        }
      } else {
        foreach (i; 0 .. N) foreach (j; 0 .. N) {
          const x = -N / 2 + i + j;
          const y = N / 2 - i + j;
          a[(x + N) % N][(y + N) % N] = i * N + j;
        }
      }
      
      foreach (x; 0 .. N) foreach (y; 0 .. N) {
        ++a[x][y];
      }
      
      auto a1 = new int[][](N, N);
      foreach (x; 0 .. N) foreach (y; 0 .. N) {
        a1[x][y] = a[x][N - 1 - y];
      }
      auto a2 = new int[][](N, N);
      foreach (x; 0 .. N) foreach (y; 0 .. N) {
        a2[x][y] = N^^2 - 1 - a[x][y];
      }
      
      const sA = calc(A);
      const sa = calc(a);
      const sa1 = calc(a1);
      const sa2 = calc(a2);
      debug {
        writefln("N = %2d: %s %s %s", N, sa, sa1, sa2);
        stdout.flush;
      }
      if (sA == sa) {
        // ok
      } else if (sA == sa1) {
        a = a1;
      } else if (sA == sa2) {
        a = a2;
      } else {
        assert(false);
      }
      
      writeln("possible");
      foreach (x; 0 .. N) {
        writeln(a[x].to!string.replaceAll(regex(`[\[\],]`), ""));
      }
      
      const sum = a[0].sum;
      foreach (x; 0 .. N) {
        assert(sum == a[x].sum);
      }
      foreach (y; 0 .. N) {
        assert(sum == iota(N).map!(x => a[x][y]).sum);
      }
      assert(sum == iota(N).map!(x => a[x][x]).sum);
      assert(sum == iota(N).map!(x => a[x][N - 1 - x]).sum);
    }
  } catch (EOFException e) {
  }
}
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