QOJ.ac

QOJ

ID题目提交者结果用时内存语言文件大小提交时间测评时间
#178952#6756. 桂花树bluebayou70 177ms3760kbC++142.1kb2023-09-14 15:49:112023-09-14 15:49:12

Judging History

你现在查看的是最新测评结果

  • [2023-09-14 15:49:12]
  • 评测
  • 测评结果:70
  • 用时:177ms
  • 内存:3760kb
  • [2023-09-14 15:49:11]
  • 提交

answer

#include <iostream>
#include <cstring>
#include <vector>
#include <algorithm>
using namespace std;
typedef long long ll;
const ll mod=1000000007;
const int maxn=60005;
ll n,m,k;
int lca[105][105],LCA[105][105],pa[maxn],a[maxn];

int dsu[maxn];ll ans;
int find(int x){return x==dsu[x]?x:find(dsu[x]);}
int vis[maxn];
void dfs(int cur){
    if(cur>n+m){
        int cnt=0;
        for(int i=1;i<=n+m;++i)
            if(dsu[i]==i)cnt++;
        if(cnt!=1)return;

        for(int u=1;u<=n+m;u++){
            for(int i=1;i<=n+m;++i)vis[i]=false;
            for(int i=u;i;i=a[i])vis[i]=true;
            for(int v=u;v<=n+m;v++)
                for(int i=v;i;i=a[i])
                    if(vis[i]){LCA[u][v]=LCA[v][u]=i;break;}
        }

        for(int i=1;i<=n;++i)
            for(int j=i;j<=n;++j)
                if(lca[i][j]!=LCA[i][j])return;
        for(int i=1;i<=n+m;++i)
            for(int j=i;j<=n+m;++j)
                if(LCA[i][j]>max(i,j)+k)return;
        ans++;
        return;
    }
    for(a[cur]=1;a[cur]<=n+m;a[cur]++){
        int u=find(a[cur]),v=find(cur);
        if(u==v)continue;
        int tmp=dsu[u];dsu[u]=v;
        dfs(cur+1);
        dsu[u]=tmp;
    }
}

int main(){int _o,T;
    for(cin>>_o>>T;T--;){
        cin>>n>>m>>k;
        for(int i=2;i<=n;++i)cin>>pa[i];
        if(k==0){
            ll ans=1;
            for(int i=n;i<=n+m-1;++i)
                ans=ans*(2*i-1)%mod;
            cout<<ans<<endl;
        }else if(m==0)cout<<1<<endl;
        else if(m==1){
            cout<<(n+n-1)%mod<<endl;
        }else if(m==2){
            cout<<(4*n*n-1+n-1)%mod<<endl;
        }else{
            ans=0;
            for(int u=1;u<=n;u++){
                for(int i=1;i<=n;++i)vis[i]=false;
                for(int i=u;i;i=pa[i])vis[i]=true;
                for(int v=u;v<=n;v++)
                    for(int i=v;i;i=pa[i])
                        if(vis[i]){lca[u][v]=lca[v][u]=i;break;}
            }
        for(int i=1;i<=n+m;++i)dsu[i]=i;
            dfs(2);
            cout<<ans%mod<<endl;
        }
    }
    return 0;
}

詳細信息

Test #1:

score: 5
Accepted
time: 177ms
memory: 3668kb

input:

1 15
4 2 9
1 2 3
4 4 1
1 1 1
4 3 10
1 2 3
4 2 10
1 2 3
2 3 0
1
2 2 8
1
2 4 10
1
3 3 0
1 2
3 2 0
1 1
2 2 0
1
2 4 9
1
4 2 0
1 1 1
2 4 1
1
4 4 8
1 1 1
3 3 0
1 2

output:

66
10132
787
66
105
16
1296
315
35
15
1296
63
1110
11384
315

result:

ok 15 numbers

Test #2:

score: 5
Accepted
time: 101ms
memory: 3664kb

input:

2 15
4 2 0
1 1 1
3 4 8
1 2
2 2 9
1
3 4 0
1 1
4 2 9
1 1 1
3 4 2
1 1
3 3 10
1 1
3 3 0
1 2
3 2 0
1 1
3 2 0
1 1
3 4 2
1 2
2 2 0
1
2 2 0
1
4 4 8
1 1 2
3 2 0
1 2

output:

63
4553
16
3465
66
4347
366
315
35
35
4347
15
15
11384
35

result:

ok 15 numbers

Test #3:

score: 5
Accepted
time: 59ms
memory: 3760kb

input:

3 15
25363 0 10
1 2 2 4 5 6 5 7 5 7 7 8 13 11 13 12 17 14 19 20 20 22 23 24 22 26 26 24 28 28 30 32 32 30 34 33 35 34 38 37 41 41 40 40 42 46 45 44 47 49 51 49 51 54 54 56 55 58 57 59 60 62 60 61 64 65 63 65 68 66 70 68 69 74 75 72 76 77 78 77 77 78 79 84 83 83 85 87 89 90 91 90 90 91 93 93 97 95 98...

output:

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

result:

ok 15 numbers

Test #4:

score: 5
Accepted
time: 1ms
memory: 3720kb

input:

4 15
95 1 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 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 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
81 1 0
1 1 3 3 2 4 4 4 7 8 8 11 11 12 15 16 17 18 19 17 19 22 20 22 24 25 27 24 25 26 28 29 32 33 32...

output:

189
161
157
183
179
179
185
165
161
179
191
159
199
177
195

result:

ok 15 numbers

Test #5:

score: 5
Accepted
time: 49ms
memory: 3700kb

input:

5 15
24238 1 9
1 2 2 3 2 3 7 6 6 8 11 8 13 14 14 13 14 15 15 20 17 21 19 24 25 22 23 28 27 29 28 31 32 34 35 32 35 35 39 37 38 42 39 41 43 42 47 47 45 48 49 52 50 52 51 55 53 57 58 58 60 58 60 64 62 66 66 65 65 69 68 68 73 71 72 73 75 78 77 76 78 82 81 84 82 85 84 87 86 89 90 90 90 90 91 93 94 94 98...

output:

48475
54131
56879
54501
49951
55359
46639
52775
56387
53417
55987
58213
48849
46865
56865

result:

ok 15 numbers

Test #6:

score: 5
Accepted
time: 1ms
memory: 3628kb

input:

6 15
90 2 0
1 1 3 3 4 6 3 5 6 1 4 8 6 3 7 2 8 17 12 1 15 8 10 17 4 7 22 1 16 15 13 17 6 24 18 20 29 24 5 37 26 19 1 36 10 11 1 32 12 29 25 36 43 25 36 35 27 30 48 13 57 43 3 48 20 49 10 42 33 32 15 67 3 72 18 59 45 65 22 47 21 76 44 36 70 31 40 36 75
97 2 10
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...

output:

32399
37731
39999
28223
29668
37731
36193
26895
35436
39301
33946
31771
30975
24335
36958

result:

ok 15 numbers

Test #7:

score: 5
Accepted
time: 54ms
memory: 3748kb

input:

7 15
23937 2 0
1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 46 46 47 47 48 48 49 49 50 50 51 ...

output:

291919861
146761194
947431229
721917569
513436690
452531920
95169750
435600974
157568937
921186289
544059002
432348666
320565654
309379121
377927681

result:

ok 15 numbers

Test #8:

score: 5
Accepted
time: 0ms
memory: 3620kb

input:

8 15
1 89 0

1 88 0

1 86 0

1 81 0

1 89 0

1 88 0

1 85 0

1 88 0

1 99 0

1 93 0

1 94 0

1 79 0

1 97 0

1 88 0

1 96 0


output:

643555007
320020087
809556406
776533926
643555007
320020087
414090976
320020087
356146221
792287148
157695640
15616881
389622706
320020087
654868516

result:

ok 15 numbers

Test #9:

score: 5
Accepted
time: 0ms
memory: 3616kb

input:

9 15
1 85 0

1 86 0

1 90 0

1 87 0

1 87 0

1 91 0

1 81 0

1 79 0

1 86 0

1 80 0

1 81 0

1 88 0

1 98 0

1 89 0

1 78 0


output:

414090976
809556406
196345448
53257258
53257258
538525843
776533926
15616881
809556406
483084065
776533926
320020087
976427145
643555007
299462530

result:

ok 15 numbers

Test #10:

score: 5
Accepted
time: 1ms
memory: 3584kb

input:

10 15
1 2600 0

1 2562 0

1 2885 0

1 2926 0

1 2980 0

1 2796 0

1 2809 0

1 2441 0

1 2964 0

1 2384 0

1 2634 0

1 2284 0

1 2732 0

1 2525 0

1 2635 0


output:

980378455
337526154
558193103
125913045
124855760
503883918
199525532
902720193
515375300
777422724
363348923
334557029
939566213
938891504
485461889

result:

ok 15 numbers

Test #11:

score: 0
Time Limit Exceeded

input:

11 15
1 97 8

1 98 8

1 75 9

1 86 10

1 91 10

1 80 10

1 99 10

1 75 10

1 81 3

1 86 8

1 76 10

1 79 9

1 77 9

1 79 8

1 92 10


output:


result:


Test #12:

score: 0
Runtime Error

input:

12 15
1 2419 9

1 3000 8

1 2952 9

1 2911 10

1 2596 8

1 2997 10

1 2479 10

1 2447 10

1 2504 8

1 2325 9

1 2473 10

1 2674 8

1 2817 9

1 2303 8

1 2253 6


output:


result:


Test #13:

score: 5
Accepted
time: 1ms
memory: 3636kb

input:

13 15
96 77 0
1 1 2 2 3 3 4 4 5 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 7 7 7 7 7 7 7 7 7 7 8 8 65 17 9 33 83 76 52 42 17 56 39 82 26 53
89 96 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 25 26 27 28 ...

output:

875522633
817514869
984115449
171618725
413906221
67403237
626927815
102038917
731937401
81736574
147698013
5718686
570093465
291610
736092684

result:

ok 15 numbers

Test #14:

score: 5
Accepted
time: 0ms
memory: 3564kb

input:

14 15
79 92 0
1 2 1 3 2 5 6 6 6 10 7 8 10 13 14 13 15 16 17 18 17 18 21 24 25 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 18 33 33 18 9 48 19 2 6 12 28 3 22 50 5 24 14 10 15 42 11 44 36 38 58 21 9
96 81 0
1 2 3 4 3 2 4 7 7 1 7 10 12 13 1 9 14 6 13 18 4 2 4 14 25 3 3...

output:

69626057
106800079
696160675
125365500
105229737
980457872
857341479
727730150
931017912
72350415
700427628
857341479
458562426
105229737
33015237

result:

ok 15 numbers

Test #15:

score: 5
Accepted
time: 52ms
memory: 3752kb

input:

15 15
27219 2720 0
1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 46 46 47 47 48 48 49 49 50 50...

output:

512213075
634563835
412223891
885815756
909933373
460122433
143582817
318866407
952581018
559698410
15451972
798343658
240180291
40997907
507956430

result:

ok 15 numbers

Test #16:

score: 5
Accepted
time: 50ms
memory: 3760kb

input:

16 15
23470 2270 0
1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 46 46 47 47 48 48 49 49 50 50...

output:

613353516
498696894
341174230
524070747
458732519
657246209
497631698
460156266
650070681
438365748
579953962
638226266
303839474
655729798
51100917

result:

ok 15 numbers

Test #17:

score: 0
Time Limit Exceeded

input:

17 15
94 82 9
1 2 2 3 3 6 6 8 6 10 7 10 13 10 14 14 16 17 18 17 20 18 23 24 22 26 25 27 25 26 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 59 39 56 52 21 51 66 59 33 68 29 34 62 47 59 76 54 72 40 40 3 4 63 33 44 73 59 18 19 70 25 77
93 86 8
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

output:


result:


Test #18:

score: 0
Time Limit Exceeded

input:

18 15
78 96 1
1 1 2 2 3 3 4 4 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 6 6 7 7 52 54 22 16 21 56 64 32 42 64 52 49 19
87 86 9
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 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...

output:


result:


Test #19:

score: 0
Runtime Error

input:

19 15
26104 2591 3
1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 46 46 47 47 48 48 49 49 50 50...

output:


result:


Test #20:

score: 0
Runtime Error

input:

20 15
22821 2558 8
1 1 1 3 2 4 2 5 5 5 7 7 13 4 15 12 1 17 15 6 10 10 13 20 20 1 16 14 9 9 28 24 14 28 2 28 35 20 30 37 1 9 21 35 42 23 41 11 15 29 10 1 13 6 24 11 11 46 32 39 32 10 59 57 20 24 51 24 60 28 65 16 31 42 25 12 27 28 53 49 15 12 58 73 83 47 7 71 2 2 26 57 82 61 17 17 48 96 23 83 2 41 59...

output:


result: