結果
| 問題 | 
                            No.93 ペガサス
                             | 
                    
| コンテスト | |
| ユーザー | 
                             yaoshimax
                         | 
                    
| 提出日時 | 2015-03-04 01:03:31 | 
| 言語 | Python2  (2.7.18)  | 
                    
| 結果 | 
                             
                                TLE
                                 
                             
                            
                         | 
                    
| 実行時間 | - | 
| コード長 | 2,564 bytes | 
| コンパイル時間 | 222 ms | 
| コンパイル使用メモリ | 7,296 KB | 
| 実行使用メモリ | 419,364 KB | 
| 最終ジャッジ日時 | 2024-06-24 01:20:32 | 
| 合計ジャッジ時間 | 14,639 ms | 
| 
                            ジャッジサーバーID (参考情報)  | 
                        judge1 / judge4 | 
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| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 4 | 
| other | AC * 5 TLE * 1 -- * 10 | 
ソースコード
N=int(raw_input())
mod=1000000007
dp=[[[[0 for i in range(2)] for j in range(2)] for k in range(N+1)] for l in range(N+2)]
dp[1][0][0][0]=1
dp[2][0][0][0]=2
for i in range(2,N+1):
    for j in range(N+1):
        #if dp[i][j][0][0] >0 or dp[i][j][0][1] > 0 or dp[i][j][1][0]>0 or dp[i][j][1][1]>0:
        #    print i,j, dp[i][j][0][0], dp[i][j][0][1],dp[i][j][1][0],dp[i][j][1][1]
        if dp[i][j][0][0]>0:
            dp[i+1][j][0][0]+=(i-1-j)*dp[i][j][0][0]
            dp[i+1][j][0][0]%=mod
            dp[i+1][j][0][1]+=2*dp[i][j][0][0]
            dp[i+1][j][0][1]%=mod
            if j-1>=0:
                dp[i+1][j-1][0][0]+=j*dp[i][j][0][0]
                dp[i+1][j-1][0][0]%=mod
        if dp[i][j][0][1]>0: # (i) (i-2) is adjacent, (i-1) (i-3) is not. insert i+1 in i+1 different positions
            dp[i+1][j][1][0]+=(i-2-j)*dp[i][j][0][1]
            dp[i+1][j][1][0]%=mod
            dp[i+1][j][1][1]+=2*dp[i][j][0][1] # next to (i-1), both side
            dp[i+1][j][1][1]%=mod # next to (i-1), both side
            dp[i+1][j][0][0]+=dp[i][j][0][1] # between (i) and (i-2)
            dp[i+1][j][0][0]%=mod # between (i) and (i-2)
            if j-1>=0:
                dp[i+1][j-1][1][0]+=j*dp[i][j][0][1]
                dp[i+1][j-1][1][0]%=mod
        if dp[i][j][1][0]>0: # (i-1) (i-3) is adjacent, (i) (i-2) is not, insert i+1 
            dp[i+1][j+1][0][0]+=(i-1-j)*dp[i][j][1][0]
            dp[i+1][j+1][0][0]%=mod
            dp[i+1][j+1][0][1]+=dp[i][j][1][0] # next to (i-1), opposite of (i-3)
            dp[i+1][j+1][0][1]%=mod # next to (i-1), opposite of (i-3)
            dp[i+1][j][0][1]+=dp[i][j][1][0] # between (i-1) and (i-3)
            dp[i+1][j][0][1]%=mod # between (i-1) and (i-3)
            if j-1>=0:
                dp[i+1][j][0][0]+=j*dp[i][j][1][0]
                dp[i+1][j][0][0]%=mod
        if dp[i][j][1][1]>0: # (i-1) (i-3) is adjacent, (i)(i-2) is adjacent
            dp[i+1][j+1][1][0]+=(i-2-j)*dp[i][j][1][1]
            dp[i+1][j+1][1][0]%=mod
            dp[i+1][j+1][1][1]+=dp[i][j][1][1] # next to (i-1), opposite of (i-3)
            dp[i+1][j+1][1][1]%=mod # next to (i-1), opposite of (i-3)
            dp[i+1][j][1][1]+=dp[i][j][1][1] # between (i-1) and (i-3)
            dp[i+1][j][1][1]%=mod # between (i-1) and (i-3)
            dp[i+1][j+1][0][0]+=dp[i][j][1][1] # between (i) and (i-2)
            dp[i+1][j+1][0][0]%=mod # between (i) and (i-2)
            if j-1>=0:
                dp[i+1][j][1][0]+=j*dp[i][j][1][1]
                dp[i+1][j][1][0]%=mod
print dp[N][0][0][0]
            
            
            
        
            
yaoshimax