結果
問題 | No.117 組み合わせの数 |
ユーザー | m77so |
提出日時 | 2018-06-13 01:53:58 |
言語 | Nim (2.0.2) |
結果 |
AC
|
実行時間 | 312 ms / 5,000 ms |
コード長 | 1,803 bytes |
コンパイル時間 | 3,272 ms |
コンパイル使用メモリ | 65,408 KB |
実行使用メモリ | 96,736 KB |
最終ジャッジ日時 | 2024-06-30 14:00:39 |
合計ジャッジ時間 | 4,277 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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コンパイルメッセージ
/home/judge/data/code/Main.nim(13, 35) Warning: Deprecated since v1.4; there should not be `high(value)`. Use `high(type)`.; high is deprecated [Deprecated] /home/judge/data/code/Main.nim(53, 18) Warning: imported and not used: 'macros' [UnusedImport]
ソースコード
const threshold = 2_000_000 const m = 1_000_000_007 type CombinationObj = object of RootObj fact: array[threshold+10,int64] factinv: array[threshold+10, int64] proc extend_euclid(x0:int64;y0:int64): array[3,int64]= var a0,a1,a2,b0,b1,b2,r0,r1,r2,q,x,y:int64 (x,y)=(x0,y0);r0=x; r1=y; a0=1; a1=0; b0=0; b1=1; while r1>0: q=r0 div r1; r2=r0 mod r1; a2=a0-q*a1; b2=b0-q*b1; r0=r1; r1=r2; a0=a1; a1=a2; b0=b1; b1=b2; result = [a0,b0,r0] proc mpow(a:int64;b:int64;m:int64=high(1'i64)): int64= result = 1 var (x,n) = (a,b) while n!=0: if (n and 1) == 1:result = (result*x) mod m x = (x*x) mod m;n = n shr 1 proc combination(): array[2,array[threshold+10, int64]]= var fact: array[threshold+10,int64] factinv: array[threshold+10, int64] fact[0]=1 for i in 1..threshold+1: fact[i] = fact[i-1]*i mod m var a = (extend_euclid(fact[threshold+1],m))[0] if a<m:a+=m factinv[threshold+1] = a mod m var i = threshold while i>=0: factinv[i] = factinv[i+1]*(i+1) mod m i-=1 return [fact,factinv] proc C(obj: CombinationObj,n: int,k:int): int64= if k < 0 or k > n: return 0 (obj.fact[n] * obj.factinv[k] mod m) * obj.factinv[n-k] mod m proc P(obj: CombinationObj,n: int,k:int): int64= if k > n: return 0 (obj.fact[n] * obj.factinv[n-k]) mod m proc H(obj: CombinationObj,n: int,k:int): int64= if n==0 and k==0: return 1 if n==0: return 0 obj.C(n+k-1,k) let cc = combination() let c = CombinationObj(fact:cc[0],factinv:cc[1]) import strutils, macros, sequtils let n = stdin.readLine.parseInt for i in 0..<n: let l = stdin.readLine let rng = l[2..^2].split(',').map(parseInt) if l[0]=='C': echo c.C(rng[0],rng[1]) elif l[0]=='P': echo c.P(rng[0],rng[1]) elif l[0]=='H': echo c.H(rng[0],rng[1])