Posted Updated  Semprathlon / Simfae Dean ACM-ICPC / Programinga few seconds read (About 55 words)

EC-final赛前一周

为信仰充值，与神犇赛码！年度最终决战，剑不出鞘更待何时？下周末双日，12.12～13，2015 ACM/ICPC EC-final 上海大学站，蓄势待发！全力备战

wpid-screenshot_2015-12-05-21-55-28.png wpid-230c7f4a3a36cc1f.jpg wpid-351324c2c7cdabb1.jpg wpid-screenshot_2015-12-05-21-55-05.png

wpid-screenshot_2015-12-05-22-02-33.png wpid-img_20151205_220342.jpg

Posted Updated  Semprathlon / Simfae Dean ACM-ICPC / Programinga minute read (About 193 words)

BestCoder

Solved Problems To be solved
Numbers Array
Sum

Numbers

没话可说。

Sum

基础一维DP的变异

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/**
 * Nov 28, 2015 8:04:23 PM
 * PrjName: Bc64-02
 * @semprathlon
 */
import java.io.*;
import java.util.*;
public class Main {
    static int[] a,s,f;
    static int fn(int x){
        return (1890*x+143)%10007;
    }
    public static void main(String[] args) throws IOException{
        InputReader in=new InputReader(System.in);
        PrintWriter out=new PrintWriter(System.out);
        while(in.nextLine()!=null){
            int n=in.nextInt();
            a=new int[n+1];
            s=new int[n+1];
            f=new int[n+1];
            for(int i=1;i<=n;i++){
                a[i]=in.nextInt();
                s[i]=s[i-1]+a[i];
            }
            int ans=s[n];
            for(int i=1;i<=n;i++){
                f[i]=Math.max(f[i-1]+fn(a[i]), s[i]);
                ans=Math.max(ans, f[i]+s[n]-s[i]);
            }
            out.println(ans);
        }
        out.flush();
        out.close();
    }

}
Posted Updated  Semprathlon / Simfae Dean ACM-ICPC / Programing3 minutes read (About 428 words)

Bestcoder

Solved Problems
Clarke and food
Clarke and five-pointed star

Clarke and food

非常轻易地完成填充。

Clarke and five-pointed star

辛辛苦苦地敲完了又挂了。。。

我这里独立思考得到的结论是：
以五角星的一个顶点为参考点，则该点必在其他四点所构成的四边形之外，且其他四点相对于该点所成的张角之和是确定的；尽管随着所取的四个点的顺序不同会有不同的值，但也仅有三种情况。
可是测样例数据时不知怎的多加了一个待判值，结果WA了 

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/**
 * Nov 14, 2015 7:35:56 PM
 * PrjName: Bc62-02
 * @semprathlon
 */
import java.io.*;
import java.util.*;
public class Main {
    static Point[] pt=new Point[5];
    static PrintWriter out=new PrintWriter(System.out);
    static boolean check1(){
        return  !Point.isPointInRect(pt[0], pt[1], pt[2], pt[3], pt[4])&&
                !Point.isPointInRect(pt[1], pt[2], pt[3], pt[4], pt[0])&&
                !Point.isPointInRect(pt[2], pt[3], pt[4], pt[0], pt[1])&&
                !Point.isPointInRect(pt[3], pt[4], pt[0], pt[1], pt[2])&&
                !Point.isPointInRect(pt[4], pt[0], pt[1], pt[2], pt[3]);
    }
    static boolean check0(Point p,Point a,Point b,Point c,Point d){
        double v1=Math.acos(-1.0)/5.0,v2=v1*2.0,v3=v1*3.0;
        double angle=Vector.angle2(p, a, b)+Vector.angle2(p, b, c)+Vector.angle2(p, c, d);
        angle=Math.abs(angle);
//        out.println(v1+","+v2+","+v3+","+angle);
        return Point.dcmp(angle-v1)==0||Point.dcmp(angle-v2)==0||Point.dcmp(angle-v3)==0;
    }
    static boolean check2(){
        return check0(pt[0], pt[1], pt[2], pt[3], pt[4])&&
                check0(pt[1], pt[2], pt[3], pt[4], pt[0])&&
                check0(pt[2], pt[3], pt[4], pt[0], pt[1])&&
                check0(pt[3], pt[4], pt[0], pt[1], pt[2])&&
                check0(pt[4], pt[0], pt[1], pt[2], pt[3]);
    }
    public static void main(String[] args) throws IOException{
        InputReader in=new InputReader(System.in);
        
        int T=in.nextInt();
        while(T-->0){
            for(int i=0;i<5;i++)
                pt[i]=new Point(in.nextDouble(), in.nextDouble());
            if (pt[0].equals(pt[1])&&pt[1].equals(pt[2])&&pt[2].equals(pt[3])&&pt[3].equals(pt[4])&&pt[4].equals(pt[0])){
                out.println("Yes");continue;
            }
            out.println(check2()?"Yes":"No");
        }
        out.flush();
        out.close();
    }
}
Posted Updated  Semprathlon / Simfae Dean ACM-ICPC / Programing3 minutes read (About 436 words)

Bestcoder

Solved Problems
Numbers
Game
Subtrees

Numbers

可能需要两个特判？

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/**
 * Oct 31, 2015 7:01:33 PM
 * PrjName: Bc61-01
 * @semprathlon
 */
import java.io.*;
import java.util.*;
public class Main {
    static int maxl=1001;
    static int[] f=new int[maxl];
    static Vector<Integer> v=new Vector<Integer>();
    public static void main(String[] args) throws IOException{
        InputReader in=new InputReader(System.in);
        PrintWriter out=new PrintWriter(System.out);
        while(in.nextLine()!=null){
            int n=in.nextInt();
//            if (n<1) continue;
            boolean has1=false,has2=false,has=false;;
            Arrays.fill(f, 0);
            for(int i=1;i<=n;i++){
                int k=in.nextInt();
                f[k]++;
                if (f[k]>1&&k>0) has1=true;
                if (f[k]>2) has2=true;
            }
            v.clear();
            for(int i=0;i<maxl;i++)
                if (f[i]>0)
                    v.add(i);
//            for(Integer e:v.toArray(new Integer[0]))
//                out.print(e+" ");
            if (v.get(0)==0&&has1||has2){
                out.println("YES");continue;
            }
            Integer[] a=v.toArray(new Integer[0]);
            for(int i=0;i<a.length-1;i++)
                if (!has)
                    for(int j=a.length-1;j>i;j--){
                        int k=Arrays.binarySearch(a, a[j]-a[i]);
                        if (k>i&&k<j){
                            has=true;break;
                        }
                            
                    }
            out.println(has?"YES":"NO");
        }
        out.flush();
        out.close();
    }
}

Game

各种分类讨论，但就是要写好最边缘的特判。。。

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/**
 * Oct 31, 2015 7:28:53 PM
 * PrjName: Bc61-02
 * @semprathlon
 */
import java.io.*;
import java.util.*;
public class Main {
    public static void main(String[] args) throws IOException{
        InputReader in=new InputReader(System.in);
        PrintWriter out=new PrintWriter(System.out);
        while(in.nextLine()!=null){
            int n=in.nextInt();
            int s=in.nextInt();
            int t=in.nextInt();
            if (s==t){
                out.println(n>1?-1:0);continue;
            }
            if (t==1){
                if (s==n)
                    out.println(0);
                else if (s==2)
                    out.println(1);
                else 
                    out.println(2);
            }
            else if (t==n){
                if (s==1)
                    out.println(0);
                else if (s==n-1)
                    out.println(1);
                else
                    out.println(2);
            }
            else{
                if (s==t+1||s==t-1||s==1||s==n)
                    out.println(1);
                else 
                    out.println(2);
            }
        }
        out.flush();
        out.close();
    }

}

Subtrees

有些查找行为显然拖慢时间以致TLE。。。
有一个重要优化是从小到大枚举子树大小而不是相反方向；

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/**
 * Nov 7, 2015 10:31:31 PM
 * PrjName: hdu5524-3
 * @semprathlon
 */
import java.io.*;
import java.util.*;
public class Main {
    static int maxn=64;
    static long[] p2;
    static HashSet<Long> st=new HashSet<Long>();
    static PrintWriter out=new PrintWriter(System.out);
    static void solve(long n){
        if (n==0L) return;
        st.add(n);
        if (n==1L) return;
        long f;
        for(f=1L;;f=f<<1|1L)
            if ((f>>1)<=n-1L-f&&(f<<1)>=n-1L-f)
                break;
        solve(f);
        if ((f<<1|1)!=n)
            solve(n-1-f);
    }
    static void init(){
        p2=new long[maxn];
        p2[0]=1L;
        for(int i=1;i<maxn;i++){
            p2[i]=p2[i-1]<<1;
            p2[i-1]--;
        }
    }
    public static void main(String[] args) throws IOException{
        InputReader in=new InputReader(System.in);
        
        init();
        while(in.nextLine()!=null){
            long n=in.nextLong();
            st.clear();solve(n);
            out.println(st.size());
        }
        out.flush();
        out.close();
    }

}
Posted Updated  Semprathlon / Simfae Dean ACM-ICPC / Programing3 minutes read (About 410 words)

BestCoder

Solved Problems
SDOI
Reorder the Books

SDOI

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/**
 * 2015年10月10日 下午6:54:59
 * PrjName:Bc59-01
 * @ Semprathlon
 */
import java.io.*;
import java.util.*;
public class Main {
    static Person[] ps;
    static ArrayList<Person> li=new ArrayList<Person>();
    public static void main(String[] args) throws IOException{
        InputReader in=new InputReader(System.in);
        PrintWriter out=new PrintWriter(System.out);
        int T=in.nextInt();
        while(T-->0){
            int n=in.nextInt();
            int m=in.nextInt();
            float x1=0,x2=0;
            int female=0,h=0;
            ps=new Person[n];
            for(int i=0;i<n;i++){
                ps[i]=new Person(in.next(), in.next(), in.nextInt(), in.nextInt());
                female+=ps[i].sex;
                if (ps[i].sex==1&&h==0) h=i;
                x1=Math.max(x1, ps[i].s1);
                x2=Math.max(x2, ps[i].s2);
            }
            li.clear();
            for(int i=0;i<n;i++){
                ps[i].s1*=300;ps[i].s1/=x1;
                ps[i].s2*=300;ps[i].s2/=x2;
                ps[i].s=ps[i].s1*(float)0.3+ps[i].s2*(float)0.7;
                if (female>0){
                    if (ps[i].s>ps[h].s&&ps[i].sex==1) h=i;
                }
                else
                    if (ps[i].s>ps[h].s) h=i;
                //li.add(ps[i]);
            }
            out.println("The member list of Shandong team is as follows:");
            Person p0=new Person();
            if (female>0){
//                out.println(li.get(h).name);
                p0=new Person(ps[h]);
                ps[h].s=-1;
                m--;
            }
            Arrays.sort(ps, new Person.comp());
            li.clear();
            
            for(int i=0;i<m;i++)
                li.add(ps[i]);
            if (female>0){
                li.add(p0);m++;
            }
            ps=li.toArray(new Person[0]);
            Arrays.sort(ps, new Person.comp());
            for(int i=0;i<m;i++)
                out.println(ps[i].name);

        }
        out.flush();
        out.close();
    }
}
class Person{
    String name;
    int sex;
    float s1,s2,s;
    Person(){}
    Person(Person p){
        name=new String(p.name);
        sex=p.sex;
        s1=p.s1;
        s2=p.s2;
        s=p.s;
    }
    Person(String nm,String sx,int _s1,int _s2){
        name=new String(nm);
        if (sx.charAt(0)=='m') sex=0;
        else sex=1;
        s1=_s1;s2=_s2;
    }
    void debug(PrintWriter out){
        out.println(name+"\t"+sex+"\t"+s);
    }
    static class comp implements Comparator<Person> {
        public int compare(Person p1,Person p2){
            return -Float.compare(p1.s, p2.s);
        }
    }
}

Reorder the Books

思索再三，竟然连充分条件、必要条件都没找准，

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/** Oct 13, 2015 8:55:41 PM
 * PrjName:hdu5500
 * @author Semprathlon
 */
import java.io.*;
import java.util.*;
public class Main {
    static int[] a;
    public static void main(String[] args) throws IOException{
        InputReader in=new InputReader(System.in);
        PrintWriter out=new PrintWriter(System.out);
        int T=in.nextInt();
        while(T-->0){
            int n=in.nextInt();
            a=new int[n+1];
            for(int i=1;i<=n;i++)
                a[in.nextInt()]=i;
            int ans=0;
//            if (a[n]!=n&&a[n]!=1) ans++;
            int k=a[n];
            for(int i=n;i>1;i--)
                if (a[i-1]<k){
                    k=a[i-1];n--;
                }
                else 
                    break;
//            out.println(n);    
            for(int i=n-1;i>1;i--){
                if (a[i]==1)
                    continue;
                boolean need=false;
                for(int j=1;j<i;j++)
                    if (a[j]>a[i]) need|=true;
                for(int j=i+1;j<=n;j++)
                    if (a[j]<a[i]) need|=true;
                if (need){
                    ans++;
                    for(int j=1;j<=n;j++)
                        if (a[j]<a[i])
                            a[j]++;
                    a[i]=1;
                }
            }
            if (a[1]!=1) ans++;
            out.println(ans);
        }
        out.flush();
        out.close();
    }
}

观察、归纳后可以优化到最简，

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public class Main {
    static int[] a;
    public static void main(String[] args) throws IOException{
        InputReader in=new InputReader(System.in);
        PrintWriter out=new PrintWriter(System.out);
        int T=in.nextInt();
        while(T-->0){
            int n=in.nextInt();
            a=new int[n+1];
            for(int i=1;i<=n;i++)
                a[in.nextInt()]=i;
            int ans=0;
            int k=a[n],h=0;
            for(int i=n;i>1;i--){
                if (a[i-1]>k){
                    ans++;
                    a[i-1]=h--;
                }
                k=a[i-1];
            }
            if (a[1]!=h+1) ans++;
            out.println(ans);
        }
        out.flush();
        out.close();
    }

}
Posted Updated  Semprathlon / Simfae Dean ACM-ICPC / Programing2 minutes read (About 249 words)

BestCoder

1001 Clarke and minecraft

玩过MC无压力 

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/** Sep 19, 2015 7:12:36 PM
 * PrjName:Bc56-01
 * @author Semprathlon
 */
import java.io.*;
import java.util.*;
public class Main {

    /**
     * @param args
     */
    final static int maxn=110;
    static int cnt;
    static int[] w;
    static HashMap<Integer, Integer> mp=new HashMap<Integer,Integer>();
    public static void main(String[] args) throws IOException{
        // TODO Auto-generated method stub
        InputReader in=new InputReader(System.in);
        PrintWriter out=new PrintWriter(System.out);
        int T=in.nextInt();
        //h=new int[maxn];
        w=new int[maxn];
        while(T-->0){
            int n=in.nextInt();
            cnt=0;
            mp.clear();
            Arrays.fill(w, 0);
            for(int i=1;i<=n;i++){
                int k=in.nextInt();
                if (mp.containsKey(k))
                    w[mp.get(k)]+=in.nextInt();
                else{
                    w[cnt]+=in.nextInt();
                    mp.put(k, cnt++);
                }
            }
            int sum=0;
            for(int i=0;i<cnt;i++)
                sum+=(w[i]+63)/64;
            out.println((sum+35)/36);
        }
        out.flush();
        out.close();
    }
}

1002 Clarke and problem

第一时间想到的是容斥，而后才逐渐醒悟过来是DP。。。
另外mod的遗漏又错了一发。。。

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/** Sep 19, 2015 7:24:54 PM
 * PrjName:Bc56-02
 * @author Semprathlon
 */
import java.io.*;
import java.util.*;
public class Main {

    /**
     * @param args
     */
    final static int maxn=1010;
    final static int high=1000000000;
    final static int mod=1000000007;
    //static int[] s=new int[maxn];
    static int[][] f=new int[2][maxn];
    public static void main(String[] args) throws IOException{
        // TODO Auto-generated method stub
        InputReader in=new InputReader(System.in);
        PrintWriter out=new PrintWriter(System.out);
        int T=in.nextInt();
        while(T-->0){
            int n=in.nextInt();
            int p=in.nextInt();
            //Arrays.fill(s, 0, p, 0);
            Arrays.fill(f[0], 0, p, 0);
            f[0][0]=1;
            int cnt=0;
            //for(int j=0;j<p;j++)out.print(f[j]+" ");out.println();
            for(int i=1;i<=n;i++){
                int k=in.nextInt();
                while(k<0) k+=p;
                k%=p;
                Arrays.fill(f[cnt^1], 0,p,0);
                for(int j=0;j<p;j++){
                    f[cnt^1][(k+j)%p]+=f[cnt][j];
                    f[cnt^1][(k+j)%p]%=mod;
                }
                for(int j=0;j<p;j++){
                    f[cnt^1][j]+=f[cnt][j];
                    f[cnt^1][j]%=mod;
                }
                cnt^=1;
            }
            out.println(f[cnt][0]);
            
        }
        out.flush();
        out.close();
    }
}

1003 Clarke and puzzle

没有总结好Nim游戏的规律啊。。。超简单的代码

Posted Updated  Semprathlon / Simfae Dean ACM-ICPC / Programing3 minutes read (About 472 words)

2015 ACM/ICPC Asia Regional Shenyang Online

Show All Problems

Soluble Problems
Jesus Is Here

Jesus Is Here

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/** Sep 19, 2015 12:41:25 PM
 * PrjName:0919-10
 * @author Semprathlon
 */
import java.io.*;
import java.util.*;
public class Main {

    /**
     * @param args
     */
    static long[] s,l,f,ans;
    static String[] sh,sr;
    final static int maxn=201315;
    final static long mod=530600414L;
    static long mul_mod(long n, long m, long mod) {
        long ans = 0L;
        n %= mod;
        while (m > 0L) {
            if ((m & 1L) > 0L)
                ans = (ans + n) % mod;
            m >>= 1;
            n = (n + n) % mod;
        }
        return ans;
    }
    static void init(){
        s=new long[maxn];
        l=new long[maxn];
        f=new long[maxn];
        ans=new long[maxn];
        sh=new String[maxn];
        sr=new String[maxn];
        s[1]=s[2]=0;s[3]=1;s[4]=3;
        f[1]=f[2]=0;f[3]=f[4]=1;
        l[1]=1;l[2]=2;l[3]=3;l[4]=5;
        ans[1]=ans[2]=ans[3]=ans[4]=0;
        sh[3]=new String("cf");sr[3]=new String("ff");
        sr[4]=new String("ff");sr[4]=new String("ff");
    }
    static long solve(int n/*,PrintWriter out*/){
        long res=0L;
        if (n<5) return res;
        if (ans[n]>0L) return ans[n];
        res+=solve(n-2);
        res+=solve(n-1);
        //res+=solve(n-2,out);
        //res+=solve(n-1,out);
        sh[n]=sh[n-2];sr[n]=sr[n-1];
        boolean has=false;
        if (sr[n-2].compareTo("cf")==0&&sh[n-1].charAt(0)=='f'){
            has=true;s[n]+=l[n-2]-1;
            res-=s[n-2];
            res+=mul_mod((l[n-2]-1),f[n-2],mod);
        }
        if (sr[n-2].charAt(1)=='c'&&sh[n-1].compareTo("ff")==0){
            has=true;s[n]+=l[n-2];
            res-=s[n-2];
            res+=mul_mod(l[n-2],f[n-2],mod);
        }
        s[n]+=(s[n-2]+s[n-1]+mul_mod(l[n-2],f[n-1],mod))%mod;s[n]%=mod;
        f[n]=has?f[n-2]+f[n-1]+1:f[n-2]+f[n-1];f[n]%=mod;
        l[n]=l[n-2]+l[n-1];l[n]%=mod;
        //out.print(n+":");out.print(res+" ");
        res-=mul_mod(s[n-2],f[n-1],mod);//out.print(res+" ");
        //res+=s[n-1]*(has?f[n-2]+1:f[n-2]);out.print(res+" ");
        //res+=l[n-2]*f[n-1];out.println(res+" ");
        res+=mul_mod(s[n-1]+mul_mod(l[n-2],f[n-1],mod),f[n-2],mod);//out.println(res+" ");
        while(res<0L) res+=mod;
        //if (has) res+=
        res%=mod;
        ans[n]=res;
        return res;
    }
    public static void main(String[] args) throws IOException{
        // TODO Auto-generated method stub
        InputReader in=new InputReader(System.in);
        PrintWriter out=new PrintWriter(System.out);
        int T=in.nextInt(),cas=0;
        init();
        for(int i=5;i<maxn;i++)
            solve(i);
        while(T-->0){
            //long k=solve(in.nextInt(), out);
            long k=solve(in.nextInt());
            out.println("Case #"+(++cas)+": "+k);
        }
        out.flush();
        out.close();
    }
}

就差一点了，只剩减法取模的方法不太科学。
递归形式有利于寻找思路，改写成非递归形式更简练。

Posted Updated  Semprathlon / Simfae Dean ACM-ICPC / Programing5 minutes read (About 792 words)

2015 ACM/ICPC Asia Regional Changchun Online

Show All Problems

Soluble Problems
Alisha’s Party
Unknown Treasure

Alisha’s Party

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/** Sep 13, 2015 12:39:06 PM
 * PrjName:0913-01
 * @author Semprathlon
 */
import java.io.*;
import java.util.*;

public class Main {
	static Person[] per;
	static Pair[] cm;
	static PriorityQueue<Person> que = new PriorityQueue<Person>(new Person.Comp());
	static Vector<String> ans = new Vector<String>();

	public static void main(String[] args) throws IOException {
		InputReader in = new InputReader(System.in);
		PrintWriter out = new PrintWriter(System.out);
		int T = in.nextInt();
		while (T-- > 0) {
			int n = in.nextInt();
			int m = in.nextInt();
			int q = in.nextInt();
			per = new Person[n];
			for (int i = 0; i < n; i++)
				per[i] = new Person(in.next(), in.nextInt(), i + 1);
			cm = new Pair[m];
			for (int i = 0; i < m; i++)
				cm[i] = new Pair(in.nextInt(), in.nextInt());
			Arrays.sort(cm, new Pair.Comp());
			que.clear();
			int t = 0;
			ans.clear();
			for (int i = 0; i < n; i++) {
				que.add(per[i]);
				if (t < m && cm[t].l == i + 1) {
					for (int j = 0; j < cm[t].r && !que.isEmpty(); j++)
						ans.add(que.poll().name);
					t++;
				}
			}
			while (!que.isEmpty())
				ans.add(que.poll().name);
			while (q-- > 0) {
				out.print(ans.get(in.nextInt() - 1) + (q > 0 ? " " : ""));
			}
			out.println();
		}
		out.flush();
		out.close();
	}
}

class Person {
	String name;
	int v, t;
	Person() {
	}
	Person(String _nm, int _v, int _t) {
		name = _nm;
		v = _v;
		t = _t;
	}
	static class Comp implements Comparator<Person> {
		public int compare(Person p1, Person p2) {
			if (p1.v == p2.v)
				return Integer.compare(p1.t, p2.t);
			return -Integer.compare(p1.v, p2.v);
		}
	}
}

class Pair {
	int l, r;
	Pair() {
	}
	Pair(int a, int b) {
		l = a;
		r = b;
	}
	static class Comp implements Comparator<Pair> {
		public int compare(Pair o1, Pair o2) {
			if (o1.l == o2.l)
				return Integer.compare(o1.r, o2.r);
			return Integer.compare(o1.l, o2.l);
		}
	}
}

能不能别再搞那个复杂的合并了啊……还有不要对空优先队列做push操作啊……

Unknown Treasure

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/** Sep 13, 2015 9:26:58 AM
 * PrjName:0913-10
 * @author Semprathlon
 */
import java.io.*;
import java.util.*;

public class Main {

    final static int maxn = 110000;
    static long[] fac = new long[maxn];
    static long[] p, a;
    static long x, y;

    static void Get_Fac(long n) {
        fac[0] = 1;
        for (int i = 1; i <= n; i++) {
            fac[i] = fac[i - 1] * i;
            fac[i] %= n;
        }
    }

    static void extgcd(long a, long b) {
        if (b == 0L) {
            x = 1L;
            y = 0L;
            return;
        }
        extgcd(b, a % b);
        long t = x;
        x = y;
        y = t - a / b * y;
    }

    static long pow_mod(long n, long m, long mod) {
        long res = 1L;
        n %= mod;
        while (m > 0L) {
            if ((m & 1L) > 0L)
                res = res * n % mod;
            n = n * n % mod;
            m >>= 1;
        }
        return res;
    }

    static long mul_mod(long n, long m, long mod) {
        long ans = 0L;
        n %= mod;
        while (m > 0L) {
            if ((m & 1L) > 0L)
                ans = (ans + n) % mod;
            m >>= 1;
            n = (n + n) % mod;
        }
        return ans;
    }

    static long div_mod(long n, long m, long mod) {
        return n * pow_mod(m, mod - 2, mod) % mod;
    }

    static long C(long n, long m, long mod) {
        int a = (int) (n % mod), b = (int) (m % mod);
        return div_mod(fac[a], mul_mod(fac[a - b], fac[b], mod), mod);
    }

    static long Lucas(long n, long m, long mod) {
        long ret = 1L;
        while (n > 0L && m > 0L) {
            if (n % mod < m % mod)
                return 0L;
            ret = mul_mod(ret, C(n, m, mod), mod);
            ret %= mod;
            n /= mod;
            m /= mod;
        }
        return ret;
    }

    // 中国剩余定理 x == a[i] (mod m[i]) 共有n个方程。
    static long CRT(long n, long[] a, long[] m) {
        long pro = 1L, res = 0L;
        for (int i = 0; i < n; i++)
            pro *= m[i];
        for (int i = 0; i < n; i++) {
            long w = pro / m[i];
            extgcd(m[i], w);
            res = (res + mul_mod(y, mul_mod(w, a[i], pro), pro)) % pro;
        }
        return (res + pro) % pro;
    }

    public static void main(String[] args) {
        InputReader in = new InputReader(System.in);
        PrintWriter out = new PrintWriter(System.out);
        int T = in.nextInt();
        while (T-- > 0) {
            long n = in.nextLong();
            long m = in.nextLong();
            long num = in.nextLong();
            p = new long[15];
            a = new long[15];
            for (int i = 0; i < num; i++)
                p[i] = in.nextLong();
            for (int i = 0; i < num; i++) {
                Get_Fac(p[i]);
                a[i] = Lucas(n, m, p[i]);
            }
            out.println(CRT(num, a, p));
        }
        out.flush();
        out.close();
    }

}

一堆数论模板的集体亮相……但是为何解n个方程的中国剩余定理模板就难以被收集？

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