結果
問題 | No.336 門松列列 |
ユーザー | holeguma |
提出日時 | 2016-01-15 23:37:35 |
言語 | Java21 (openjdk 21) |
結果 |
TLE
|
実行時間 | - |
コード長 | 4,049 bytes |
コンパイル時間 | 2,259 ms |
コンパイル使用メモリ | 78,656 KB |
実行使用メモリ | 118,600 KB |
最終ジャッジ日時 | 2024-09-19 19:33:35 |
合計ジャッジ時間 | 8,694 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | TLE | - |
testcase_01 | -- | - |
testcase_02 | -- | - |
testcase_03 | -- | - |
testcase_04 | -- | - |
testcase_05 | -- | - |
testcase_06 | -- | - |
testcase_07 | -- | - |
testcase_08 | -- | - |
testcase_09 | -- | - |
testcase_10 | -- | - |
testcase_11 | -- | - |
ソースコード
import java.io.InputStream; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import java.util.Arrays; import java.util.Comparator; import java.util.InputMismatchException; import java.util.NoSuchElementException; import java.math.BigInteger; public class Main{ static PrintWriter out; static InputReader ir; static void solve(){ final long MOD=(long)1e9+7; int n=ir.nextInt(); if(n<=2){ out.println(0); return; } long[] fact=factArray(n,MOD),factInv=factInverseArray(n,MOD); long ans=fact[n]; int sig=-1; for(int i=3;i<=n;i++){ ans+=sig*comb(n,i,fact,factInv,MOD)*fact[n-i]*(n-i+1)*2; while(ans<0) ans+=MOD; ans%=MOD; sig*=-1; } out.println(ans); } public static long mod_inverse(long a,long MOD){ long[] ret=extgcd(a,MOD); return (MOD+ret[0]%MOD)%MOD; } public static long[] extgcd(long a,long b){ long[] ret=new long[3]; ret[2]=_extgcd(a,b,ret); return ret; } private static long _extgcd(long a,long b,long[] x){ long g=a; x[0]=1; x[1]=0; if(b!=0){ g=_extgcd(b,a%b,x); long temp=x[0]; x[0]=x[1]; x[1]=temp; x[1]-=(a/b)*x[0]; } return g; } private static long[] factArray(int n,long MOD){ long[] ret=new long[n+1]; ret[0]=1%MOD; for(int i=1;i<=n;i++){ ret[i]=ret[i-1]*i; ret[i]%=MOD; } return ret; } private static long[] factInverseArray(int n,long MOD){ long[] ret=new long[n+1]; ret[0]=1; for(int i=1;i<=n;i++){ ret[i]=ret[i-1]*mod_inverse((long)i,MOD)%MOD; } return ret; } public static long comb(int n,int m,long[] fact,long[] factInv,long MOD){ long ret=fact[n]; ret*=factInv[m]; ret%=MOD; ret*=factInv[n-m]; ret%=MOD; return ret; } public static void main(String[] args) throws Exception{ 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 BigInteger nextBigInteger(){return new BigInteger(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; } } }