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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#852182#8320. 种树namespace000100 ✓1321ms28316kbC++142.8kb2025-01-11 10:32:322025-01-11 10:32:33

Judging History

你现在查看的是最新测评结果

  • [2025-01-11 10:32:33]
  • 评测
  • 测评结果:100
  • 用时:1321ms
  • 内存:28316kb
  • [2025-01-11 10:32:32]
  • 提交

answer

#include<bits/stdc++.h>
//#define int long long
using namespace std;
const int Max=100+10;
vector<int> G[Max];
int dfn[Max];
string s;
void dfs(int u,int fa){
	for(auto v:G[u]){
		if(v==fa){
			continue;
		}
		s+="(";
		dfs(v,u);
		s+=")";
	}
}
// unsigned __int128 ejc[Max<<1];
void write(unsigned __int128 x){
	if(x>=10){
		write(x/10);
	}
	putchar((char)(x%10+'0'));
}
/*
unsigned __int128 gcd(unsigned __int128 x,unsigned __int128 y){
	if(y==0){
		return x;
	}
	return gcd(y,x%y);
}
unsigned __int128 C(int n,int m){
	unsigned __int128 x=1;
	unsigned __int128 y=1;
	for(int i=1;i<=n-m;i++){
		x*=(m+i);
		y*=i;
		int tmp=gcd(x,y);
		x/=tmp;
		y/=tmp;
	}
	return x;
}
*/
unsigned __int128 f[Max][Max];
unsigned __int128 g[Max][Max];
unsigned __int128 encoder(int n, const int *p){
	for(int i=0;i<=n;i++){
		for(int j=0;j<=n;j++){
			f[i][j]=0;
		}
	}
	f[n-1][n-1]=1;
	for(int i=n-1;i>=0;i--){
		for(int j=n-1;j>=0;j--){
			if(j+1<=i){
				f[i][j]+=f[i][j+1];
			}
			f[i][j]+=f[i+1][j];
		}
	}
	for(int i=1;i<=n;i++){
		G[i].clear();
	}
	for(int i=2;i<=n;i++){
		G[p[i]].push_back(i);
	}
	s="";
	dfs(1,0);
	// ejc[0]=1;
	// for(int i=1;i<=2*n;i++){
	// 	ejc[i]=ejc[i-1]*i;
	// 	write(ejc[i]);
	// 	cout<<'\n';
	// }
	unsigned __int128 ans=0;
	int nowx=0;
	int nowy=0;
	int i=1;
	for(auto c:s){
		if(nowx>nowy&&c=='('){
			nowy++;
			// unsigned __int128 tmp=C(2*(n-1)-nowx-nowy,(n-1)-nowx)-C(abs((n-1)-(nowy-1))+abs((n-1)-(nowx+1)),abs((n-1)-(nowx+1)));
			unsigned __int128 tmp=f[nowx][nowy];
			ans+=tmp;
			nowy--;
		}
		if(c=='('){
			nowx++;
		} else {
			nowy++;
		}
		i++;
		// cout<<nowx<<' '<<nowy<<' ';
		// write(ans);
		// cout<<'\n';
	}
	return ans;
}

// unsigned __int128 djc[Max*10];
// unsigned __int128 dC(int n,int m){
// 	return djc[n]/djc[m]/djc[n-m];
// }
void decoder(int n, unsigned __int128 M, int *p){
	for(int i=0;i<=n;i++){
		for(int j=0;j<=n;j++){
			g[i][j]=0;
		}
	}
	g[n-1][n-1]=1;
	for(int i=n-1;i>=0;i--){
		for(int j=n-1;j>=0;j--){
			if(j+1<=i){
				g[i][j]+=g[i][j+1];
			}
			g[i][j]+=g[i+1][j];
		}
	}
	// djc[0]=1;
	// for(int i=1;i<=10*n;i++){
	// 	djc[i]=djc[i-1]*i;
	// }
	string s="";
	int nowx=0;
	int nowy=0;
	for(int i=1;i<=2*(n-1);i++){
		if(nowx>nowy){
			nowy++;
			// unsigned __int128 tmp=C(2*(n-1)-nowx-nowy,(n-1)-nowx)-C(abs((n-1)-(nowy-1))+abs((n-1)-(nowx+1)),abs((n-1)-(nowx+1)));
			unsigned __int128 tmp=g[nowx][nowy];
			if(tmp<=M){
				nowy--;
				nowx++;
				M-=tmp;
				s+="(";
			} else {
				s+=")";
			}
		} else {
			s+="(";
			nowx++;
		}
		// cout<<"!"<<nowx<<' '<<nowy<<'\n';
	}
	// cout<<"!"<<s<<'\n';
	int now=1;
	p[1]=0;
	int tot=1;
	for(auto c:s){
		if(c=='('){
			++tot;
			p[tot]=now;
			now=tot;
		} else {
			now=p[now];
		}
	}
}

/*
time:
mem:
*/

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 20
Accepted

Test #1:

score: 20
Accepted
time: 35ms
memory: 6456kb

Manager to Encoder

3000
64
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 36 14 30 9 50 27 42 13 18 34 16 12 22 47 
94295845827537339262463829429711864
65
0 1 2 2 2 3 1 7 1 8 6 10 8 6 5 1 15 1 6 18 2 6 12 10 14 13 10 9 20 29 1...

Encoder to Manager

3000
64
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 36 14 30 9 50 27 42 13 18 34 16 12 22 47 
94295845827537339262463829429711864
65
0 1 2 2 2 3 1 7 1 8 6 10 8 6 5 1 15 1 6 18 2 6 12 10 14 13 10 9 20 29 1...

Manager to Decoder

3000
64
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 36 14 30 9 50 27 42 13 18 34 16 12 22 47 
94295845827537339262463829429711864
65
0 1 2 2 2 3 1 7 1 8 6 10 8 6 5 1 15 1 6 18 2 6 12 10 14 13 10 9 20 29 1...

Decoder to Manager

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 24 24 27 24 24 24 31 24 24 24 24 36 24 24 39 24 24 24 24 24 24 46 24 24 24 24 24 52 24 24 24 56 22 18 16 14 13 12 9 
0 1 2 3 4 4 6 4 8 9 10 11 11 10 10 15 9 8 4 19 4 4 2 2 24 25 26 27 27 24 30 2 2 1 34 35 36 37 38 36 36 35 42 35 1 45 4...

result:

ok Right output.

Subtask #2:

score: 15
Accepted

Test #2:

score: 15
Accepted
time: 37ms
memory: 6224kb

Manager to Encoder

3000
66
0 1 1 2 4 2 6 7 3 3 6 9 10 10 13 4 8 12 15 5 18 15 9 13 8 5 17 20 17 16 11 19 18 30 29 22 23 35 37 33 36 27 27 7 23 25 21 46 22 45 40 25 20 43 38 41 34 35 34 29 50 42 47 24 24 40 
1242701010161053959992258400520587101
70
0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...

Encoder to Manager

3000
66
0 1 1 2 4 2 6 7 3 3 6 9 10 10 13 4 8 12 15 5 18 15 9 13 8 5 17 20 17 16 11 19 18 30 29 22 23 35 37 33 36 27 27 7 23 25 21 46 22 45 40 25 20 43 38 41 34 35 34 29 50 42 47 24 24 40 
1242701010161053959992258400520587101
70
0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...

Manager to Decoder

3000
66
0 1 1 2 4 2 6 7 3 3 6 9 10 10 13 4 8 12 15 5 18 15 9 13 8 5 17 20 17 16 11 19 18 30 29 22 23 35 37 33 36 27 27 7 23 25 21 46 22 45 40 25 20 43 38 41 34 35 34 29 50 42 47 24 24 40 
1242701010161053959992258400520587101
70
0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...

Decoder to Manager

0 1 2 3 4 5 5 4 3 9 10 11 11 2 14 15 16 17 18 19 18 21 17 23 24 25 24 23 16 29 30 29 15 14 34 1 36 37 38 39 40 41 39 43 44 44 37 47 48 47 50 51 36 53 54 55 56 55 58 59 60 58 54 63 63 53 
0 1 1 1 4 1 1 1 1 9 1 11 12 1 1 1 1 17 18 19 17 21 1 23 23 1 26 1 1 1 1 31 32 31 1 35 1 1 38 39 1 1 42 1 44 45 1 ...

result:

ok Right output.

Subtask #3:

score: 15
Accepted

Test #3:

score: 15
Accepted
time: 1321ms
memory: 27240kb

Manager to Encoder

100000
70
0 1 2 2 2 2 1 2 4 8 3 1 6 12 13 6 1 14 2 8 3 6 2 1 8 25 24 5 10 11 30 28 15 7 23 20 12 29 28 17 31 27 10 18 6 3 38 39 40 43 7 33 23 23 38 28 24 26 57 44 16 18 20 39 9 26 25 16 67 58 
305005011106491027045440448941717544033
67
0 1 1 1 1 4 3 4 6 2 10 3 10 7 14 6 11 15 7 13 6 14 18 9 9 4 20 2...

Encoder to Manager

100000
70
0 1 2 2 2 2 1 2 4 8 3 1 6 12 13 6 1 14 2 8 3 6 2 1 8 25 24 5 10 11 30 28 15 7 23 20 12 29 28 17 31 27 10 18 6 3 38 39 40 43 7 33 23 23 38 28 24 26 57 44 16 18 20 39 9 26 25 16 67 58 
305005011106491027045440448941717544033
67
0 1 1 1 1 4 3 4 6 2 10 3 10 7 14 6 11 15 7 13 6 14 18 9 9 4 20 2...

Manager to Decoder

100000
70
0 1 2 2 2 2 1 2 4 8 3 1 6 12 13 6 1 14 2 8 3 6 2 1 8 25 24 5 10 11 30 28 15 7 23 20 12 29 28 17 31 27 10 18 6 3 38 39 40 43 7 33 23 23 38 28 24 26 57 44 16 18 20 39 9 26 25 16 67 58 
305005011106491027045440448941717544033
67
0 1 1 1 1 4 3 4 6 2 10 3 10 7 14 6 11 15 7 13 6 14 18 9 9 4 20 2...

Decoder to Manager

0 1 2 3 4 5 6 3 3 2 10 11 2 13 14 14 16 16 14 2 20 21 22 23 20 25 25 20 20 2 30 31 32 33 33 31 36 30 38 38 30 41 42 43 42 41 46 2 2 49 49 49 1 53 53 1 56 57 58 59 58 56 1 63 64 1 66 67 66 69 
0 1 2 3 4 5 3 7 8 8 8 8 7 7 3 15 2 17 1 19 20 21 22 23 24 23 23 27 21 29 21 20 20 33 20 35 20 37 37 20 20 19...

result:

ok Right output.

Subtask #4:

score: 20
Accepted

Test #4:

score: 20
Accepted
time: 1316ms
memory: 28316kb

Manager to Encoder

100000
68
0 1 1 3 4 4 3 5 7 8 8 10 9 10 11 11 14 15 7 14 13 6 17 6 21 16 20 25 9 2 5 28 25 24 30 32 27 16 23 33 27 26 42 22 15 40 2 22 31 12 47 50 18 12 38 50 39 18 52 34 38 59 56 61 19 46 55 56 
12026303059495883086009269677210096790
70
0 1 2 1 2 4 4 3 6 6 7 10 11 5 9 15 13 9 5 11 7 14 22 20 21 21 ...

Encoder to Manager

100000
68
0 1 1 3 4 4 3 5 7 8 8 10 9 10 11 11 14 15 7 14 13 6 17 6 21 16 20 25 9 2 5 28 25 24 30 32 27 16 23 33 27 26 42 22 15 40 2 22 31 12 47 50 18 12 38 50 39 18 52 34 38 59 56 61 19 46 55 56 
12026303059495883086009269677210096790
70
0 1 2 1 2 4 4 3 6 6 7 10 11 5 9 15 13 9 5 11 7 14 22 20 21 21 ...

Manager to Decoder

100000
68
0 1 1 3 4 4 3 5 7 8 8 10 9 10 11 11 14 15 7 14 13 6 17 6 21 16 20 25 9 2 5 28 25 24 30 32 27 16 23 33 27 26 42 22 15 40 2 22 31 12 47 50 18 12 38 50 39 18 52 34 38 59 56 61 19 46 55 56 
12026303059495883086009269677210096790
70
0 1 2 1 2 4 4 3 6 6 7 10 11 5 9 15 13 9 5 11 7 14 22 20 21 21 ...

Decoder to Manager

0 1 2 3 2 5 1 7 8 9 10 11 12 13 14 15 13 17 17 12 11 21 22 23 24 21 26 27 27 10 30 31 32 32 31 30 36 37 38 36 40 41 40 43 9 45 8 47 48 48 47 51 52 7 54 55 56 57 58 59 60 58 62 63 64 55 54 67 
0 1 2 3 4 3 2 7 8 9 10 11 8 13 14 15 13 17 18 7 20 21 21 23 20 1 26 27 28 29 30 31 30 29 28 35 35 27 38 39 4...

result:

ok Right output.

Subtask #5:

score: 30
Accepted

Test #5:

score: 30
Accepted
time: 1304ms
memory: 27596kb

Manager to Encoder

100000
70
0 1 1 3 3 5 4 5 8 8 4 9 11 9 11 14 7 13 2 14 17 15 12 6 18 21 20 22 18 25 7 10 27 22 15 32 30 6 33 38 25 19 10 16 32 36 23 36 41 29 38 17 21 16 45 37 23 24 37 19 30 29 27 42 53 41 2 64 58 40 
280331805908364233787653694780827661201
65
0 1 2 3 3 4 2 5 5 6 10 10 8 1 13 5 6 4 4 5 5 15 16 16 6...

Encoder to Manager

100000
70
0 1 1 3 3 5 4 5 8 8 4 9 11 9 11 14 7 13 2 14 17 15 12 6 18 21 20 22 18 25 7 10 27 22 15 32 30 6 33 38 25 19 10 16 32 36 23 36 41 29 38 17 21 16 45 37 23 24 37 19 30 29 27 42 53 41 2 64 58 40 
280331805908364233787653694780827661201
65
0 1 2 3 3 4 2 5 5 6 10 10 8 1 13 5 6 4 4 5 5 15 16 16 6...

Manager to Decoder

100000
70
0 1 1 3 3 5 4 5 8 8 4 9 11 9 11 14 7 13 2 14 17 15 12 6 18 21 20 22 18 25 7 10 27 22 15 32 30 6 33 38 25 19 10 16 32 36 23 36 41 29 38 17 21 16 45 37 23 24 37 19 30 29 27 42 53 41 2 64 58 40 
280331805908364233787653694780827661201
65
0 1 2 3 3 4 2 5 5 6 10 10 8 1 13 5 6 4 4 5 5 15 16 16 6...

Decoder to Manager

0 1 2 3 4 5 3 2 1 9 10 11 12 13 13 15 12 11 10 19 20 21 22 23 24 24 23 22 28 28 21 31 31 19 34 35 35 34 9 39 40 41 42 40 44 45 44 39 48 49 50 51 51 49 54 55 55 54 58 59 60 59 48 63 64 65 65 64 68 63 
0 1 2 3 4 5 6 7 6 6 10 11 11 10 14 10 6 6 5 19 19 21 5 23 5 4 26 4 28 29 30 3 32 33 34 35 36 37 37 3...

result:

ok Right output.