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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 | bluebayou | 70 | 177ms | 3760kb | C++14 | 2.1kb | 2023-09-14 15:49:11 | 2023-09-14 15:49:12 |
Judging History
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;
}
详细
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...