結果
問題 | No.1035 Color Box |
ユーザー |
![]() |
提出日時 | 2020-04-24 22:07:02 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 113 ms / 2,000 ms |
コード長 | 4,624 bytes |
コンパイル時間 | 949 ms |
コンパイル使用メモリ | 114,300 KB |
実行使用メモリ | 26,068 KB |
最終ジャッジ日時 | 2024-10-15 02:54:43 |
合計ジャッジ時間 | 3,621 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 36 |
コンパイルメッセージ
Microsoft (R) Visual C# Compiler version 3.9.0-6.21124.20 (db94f4cc) Copyright (C) Microsoft Corporation. All rights reserved.
ソースコード
using System;using System.Collections.Generic;using System.Collections;using System.Collections.Specialized;using System.Linq;using System.Text;using System.IO;using System.Reflection;using static System.Math;using System.Numerics;static class Program{const int mod=(int)1e9+7;const double eps=1e-11;static void Main(){Sc sc=new Sc();var s=sc.Ia;int n=s[0],k=s[1];Mint res=0;Cb r=new Cb(n+k);for(int i=0;i<=k;i++){Mint tmp=(r.C1(k,i)*(Mint)Fp(i,n));if((k-i)%2==1){res-=tmp;}else{res+=tmp;}}Console.WriteLine("{0}",res);}static long Fp(long x,long e){long r=1;while(e>0){if((e&1)>0){r*=x;r%=mod;}x=(x*x)%mod;e>>=1;}return r;}}public class Cb{private const int mod=(int)1e9+7;public long[] r;public Cb(int n){r=new long[n];r[0]=1;for(int i=1;i<n;i++){r[i]=(r[i-1]*i)%mod;}}public long C1(long n,long k){return (r[n]*Mi(r[k]*r[n-k]))%mod;}public long C2(long n,long k){long l=1;n%=mod;for(int i=1;i<=k;i++){l=(l*(n-i+1))%mod;l=(l*Mi(i))%mod;}return l;}public long P1(long n,long k){return n<k?0:(r[n]*Mi(r[n-k]))%mod;}public long Mi(long a){a=(a+mod)%mod;long b=mod,u=1,v=0;while(b>0){long t=a/b;a-=t*b;a^=b;b^=a;a^=b;u-=t*v;u^=v;v^=u;u^=v;}u%=mod;if(u<0){u+=mod;}return u%mod;}}public struct Mint{const int mod=(int)1e9+7;private long d;public Mint(long d){this.d=d;}public static implicit operator Mint(long d){return new Mint(d%mod);}public static explicit operator long(Mint d){return d.d;}public override string ToString(){return d.ToString();}public static Mint operator+(Mint a,long b){a.d=(a.d+b)%mod;return a;}public static Mint operator+(Mint a,Mint b){a.d=(a.d+b.d)%mod;return a;}public static Mint operator-(Mint a,long b){a.d=(mod+a.d-b)%mod;return a;}public static Mint operator-(Mint a,Mint b){a.d=(mod+a.d-b.d)%mod;return a;}public static Mint operator*(Mint a,long b){a.d=(a.d*b)%mod;return a;}public static Mint operator*(Mint a,Mint b){a.d=(a.d*b.d)%mod;return a;}public static Mint operator/(Mint a,long b){a.d=(a.d*Mi(b))%mod;return a;}public static Mint operator/(Mint a,Mint b){a.d=(a.d*Mi(b.d))%mod;return a;}private static long Mi(long a){a=(a+mod)%mod;long b=mod,u=1,v=0;while(b>0){long t=a/b;a-=t*b;a^=b;b^=a;a^=b;u-=t*v;u^=v;v^=u;u^=v;}u%=mod;if(u<0){u+=mod;}return u%mod;}}public class Sc{public int I{get{return int.Parse(Console.ReadLine());}}public long L{get{return long.Parse(Console.ReadLine());}}public double D{get{return double.Parse(Console.ReadLine());}}public string S{get{return Console.ReadLine();}}public int[] Ia{get{return Array.ConvertAll(Console.ReadLine().Split(),int.Parse);}}public long[] La{get{return Array.ConvertAll(Console.ReadLine().Split(),long.Parse);}}public double[] Da{get{return Array.ConvertAll(Console.ReadLine().Split(),double.Parse);}}public string[] Sa{get{return Console.ReadLine().Split();}}public object[] Oa{get{return Console.ReadLine().Split();}}public int[] Ia2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),int.Parse);}}public int[] Ia3(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),int.Parse);}public int[] Ia3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),int.Parse);}public long[] La2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),long.Parse);}}public long[] La3(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),long.Parse);}public long[] La3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),long.Parse);}public double[] Da2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),double.Parse);}}public double[] Da3(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),double.Parse);}public double[] Da3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),double.Parse);}public T[] Arr<T>(int n,Func<T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f();}return a;}public T[] Arr<T>(int n,Func<int,T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i);}return a;}public T[] Arr<T>(int n,Func<string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(Console.ReadLine().Split());}return a;}public T[] Arr<T>(int n,Func<int,string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i,Console.ReadLine().Split());}return a;}}