結果
問題 | No.391 CODING WAR |
ユーザー | fgwiebfaoish |
提出日時 | 2020-08-01 17:27:55 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 107 ms / 2,000 ms |
コード長 | 4,588 bytes |
コンパイル時間 | 3,641 ms |
コンパイル使用メモリ | 116,556 KB |
実行使用メモリ | 29,956 KB |
最終ジャッジ日時 | 2024-07-08 02:56:40 |
合計ジャッジ時間 | 5,547 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 | AC | 23 ms
26,164 KB |
testcase_01 | AC | 24 ms
24,236 KB |
testcase_02 | AC | 23 ms
24,188 KB |
testcase_03 | AC | 23 ms
23,932 KB |
testcase_04 | AC | 25 ms
23,932 KB |
testcase_05 | AC | 23 ms
23,932 KB |
testcase_06 | AC | 24 ms
21,940 KB |
testcase_07 | AC | 24 ms
24,112 KB |
testcase_08 | AC | 22 ms
24,188 KB |
testcase_09 | AC | 107 ms
27,776 KB |
testcase_10 | AC | 106 ms
29,956 KB |
testcase_11 | AC | 23 ms
23,804 KB |
testcase_12 | AC | 23 ms
24,060 KB |
testcase_13 | AC | 101 ms
29,816 KB |
testcase_14 | AC | 90 ms
26,620 KB |
testcase_15 | AC | 95 ms
27,240 KB |
testcase_16 | AC | 72 ms
25,776 KB |
testcase_17 | AC | 76 ms
25,956 KB |
testcase_18 | AC | 60 ms
25,264 KB |
testcase_19 | AC | 62 ms
27,256 KB |
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.La; long n=s[0]; int k=(int)s[1]; if(n<k){ Console.WriteLine(0); return; } Cb r=new Cb(k<<1); Mint res=0; 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,f,v; public Cb(int n){ r=new long[n]; f=new long[n]; v=new long[n]; r[0]=r[1]=f[0]=f[1]=v[1]=1; for(int i=2;i<n;i++){ r[i]=r[i-1]*i%mod; v[i]=mod-v[mod%i]*(mod/i)%mod; f[i]=f[i-1]*v[i]%mod; } } public long C1(long n,long k){return r[n]*(f[k]*f[n-k]%mod)%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*v[i]%mod;} return l; } public long C3(long n,long k){return (r[n]*Mi(r[k]*r[n-k]))%mod;} public long P1(long n,long k){return n>=k?r[n]*Mi(r[n-k])%mod:0;} 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);u-=t*v;(u,v)=(v,u);} 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); u-=t*v;(u,v)=(v,u); } 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(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),int.Parse);} public int[] Ia3(int a){return Array.ConvertAll((Console.ReadLine()+" "+a.ToString()).Split(),int.Parse);} public long[] La2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),long.Parse);}} public long[] La3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),long.Parse);} public long[] La3(int a){return Array.ConvertAll((Console.ReadLine()+" "+a.ToString()).Split(),long.Parse);} public double[] Da2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),double.Parse);}} public double[] Da3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).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;} }