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 |
|---|---|---|---|---|---|---|---|---|---|
| #416299 | #8720. BFS 序 0 | zjx666 | AC ✓ | 336ms | 78140kb | C++11 | 1.7kb | 2024-05-21 19:01:21 | 2024-05-21 19:01:22 |
Judging History
answer
#include<bits/stdc++.h>
//#define int long long
using namespace std;
const int maxn=500010;
int d[maxn];
vector<int>e[maxn];
vector<int>e2[maxn];
int a[maxn];
int f[maxn][30];
int vi[maxn];
queue<int>q;
int r[maxn];
int n;
void bfs(int x,int deep)
{
d[x]=deep+1;
for(int i=1;i<=25;i++)
{
f[x][i]=f[f[x][i-1]][i-1];
}
for(int i=0;i<e[x].size();i++)
{
f[e[x][i]][0]=x;
bfs(e[x][i],d[x]);
}
}
void lca(int x,int y)
{
for(int i=25;i>=0;i--)
{
if(f[x][i]!=f[y][i])
{
x=f[x][i];
y=f[y][i];
}
}
e2[x].push_back(y);
r[y]++;
}
void ch2(int x)
{
for(int i=0;i<e2[x].size();i++)
{
r[e2[x][i]]--;
if(!r[e2[x][i]])q.push(e2[x][i]);
}
}
bool ch()
{
int ans=0;
for(int i=1;i<=n;i++)
if(r[i]==0)q.push(i);
while(q.size())
{
int x=q.front();
q.pop();
ch2(x);
ans++;
}
if(ans!=n)return 0;
else return 1;
}
signed main()
{
ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
cin>>n;
for(int i=2;i<=n;i++)
{
int x;
cin>>x;
e[x].push_back(i);
}
f[1][0]=1;
bfs(1,0);
int q1;
cin>>q1;
while(q1--)
{
for(int i=1;i<=n;i++)
{
e2[i].clear();
r[i]=0;
vi[i]=0;
}
int m,v=1;
cin>>m;
for(int i=1;i<=m;i++)
{
cin>>a[i];
if(vi[a[i]]||a[i]<1||a[i]>n)v=0;
vi[a[i]]=1;
}
for(int i=2;i<=m&&v;i++)
{
if(d[a[i]]==d[a[i-1]])
{
lca(a[i-1],a[i]);
}
else if(d[a[i]]>d[a[i-1]])continue;
else
{
v=0;
break;
}
}
if(!v)cout<<"NO\n";
else if(!ch())cout<<"NO\n";
else cout<<"YES\n";
}
return 0;
}
/*
6
1 1 3 2 4
10
4 3 6 2 5
1 4
3 2 4 5
5 2 5 4 6 3
3 1 4 2
3 5 6 3
5 4 5 2 6 1
4 4 3 2 5
4 4 6 2 3
3 3 2 6
*/
这程序好像有点Bug，我给组数据试试？
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 34168kb
input:
6 1 1 3 2 4 10 4 3 6 2 5 1 4 3 2 4 5 5 2 5 4 6 3 3 1 4 2 3 5 6 3 5 4 5 2 6 1 4 4 3 2 5 4 4 6 2 3 3 3 2 6
output:
NO YES YES NO NO NO NO NO NO YES
result:
ok 10 token(s): yes count is 3, no count is 7
Test #2:
score: 0
Accepted
time: 336ms
memory: 78032kb
input:
300000 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 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:
NO YES YES YES NO NO NO NO NO NO YES YES NO YES NO YES YES YES NO NO NO NO YES NO NO YES NO NO NO NO YES YES YES NO NO YES NO NO NO NO NO NO NO YES NO YES NO YES NO NO NO NO YES YES YES NO NO YES NO NO NO NO NO YES YES NO NO NO NO NO YES YES NO YES NO NO NO YES NO NO YES NO NO YES YES YES NO NO NO Y...
result:
ok 254 token(s): yes count is 89, no count is 165
Test #3:
score: 0
Accepted
time: 329ms
memory: 77824kb
input:
300000 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 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:
YES NO NO YES NO NO YES YES NO YES NO YES NO NO NO YES NO NO NO NO YES NO NO NO NO NO YES YES NO NO NO YES NO NO NO NO NO YES YES YES NO NO NO NO NO NO NO YES NO YES NO NO NO YES NO NO NO YES NO NO YES NO YES YES NO NO NO YES NO YES YES YES NO YES NO YES YES YES YES YES NO YES NO NO NO NO NO YES NO ...
result:
ok 266 token(s): yes count is 102, no count is 164
Test #4:
score: 0
Accepted
time: 319ms
memory: 78140kb
input:
300000 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 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:
NO NO YES NO YES NO NO NO NO NO NO NO NO YES NO NO NO NO NO NO NO NO YES NO NO NO NO YES NO NO NO NO NO NO NO YES YES NO NO NO NO NO NO YES NO NO NO YES YES NO NO NO YES YES NO YES NO YES NO YES NO YES NO YES NO NO YES NO NO NO NO NO NO NO YES YES NO YES NO NO NO NO NO NO YES YES NO YES YES NO NO NO...
result:
ok 252 token(s): yes count is 87, no count is 165
Test #5:
score: 0
Accepted
time: 7ms
memory: 34436kb
input:
10 1 1 3 3 1 3 1 3 9 10000 4 3 5 6 9 5 3 1 4 9 6 5 6 4 3 5 7 28 8 3 4 3 1 6 3 5 8 7 2 4 4 4 2 7 5 9 2 4 10 8 4 10 3 4 5 7 3 5 2 9 6 4 7 2 3 9 5 5 9 2 5 6 1 12 3 5 8 8 1 3 5 8 4 5 9 1 29 3 9 9 1 5 8 5 5 6 10 8 8 4 8 4 2 8 10 5 7 3 7 1 8 4 7 5 1 6 7 5 9 8 3 2 1 6 4 4 1 9 5 22 10 9 5 4 5 8 10 3 2 1 10 ...
output:
NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO YES NO NO NO NO YES NO NO NO NO NO YES NO NO NO NO NO NO NO YES NO NO NO NO YES NO NO NO YES NO NO YES NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO YES NO YES NO NO NO NO NO NO NO NO NO YES YES NO YES NO NO NO NO NO NO ...
result:
ok 10000 token(s): yes count is 1058, no count is 8942
Test #6:
score: 0
Accepted
time: 3ms
memory: 34184kb
input:
9 1 2 1 2 2 4 2 6 10000 6 5 1 4 3 7 8 14 6 8 7 9 7 5 1 8 3 6 3 8 5 2 2 6 9 17 7 8 6 5 2 1 5 5 9 3 4 1 5 2 7 2 5 3 8 6 5 5 3 9 1 6 8 8 3 5 8 7 9 4 6 2 4 8 9 6 5 7 4 7 2 9 3 8 1 6 1 4 9 5 6 2 4 7 5 4 3 5 9 5 2 1 3 4 4 5 7 3 3 9 1 8 4 4 2 8 6 26 7 4 7 6 1 7 9 4 5 5 8 9 8 2 4 8 9 6 2 8 6 4 5 5 4 4 45 3 ...
output:
NO NO YES NO YES NO NO NO NO NO NO NO NO NO YES NO NO NO NO NO NO YES NO NO NO NO NO NO YES NO NO NO NO NO NO NO NO YES YES NO NO NO YES NO NO NO NO NO NO NO NO NO NO NO NO YES NO NO NO NO NO NO NO NO NO NO NO NO NO YES NO YES NO NO NO NO NO NO NO NO YES NO NO NO YES NO NO YES NO NO NO NO NO NO NO N...
result:
ok 10000 token(s): yes count is 1492, no count is 8508
Test #7:
score: 0
Accepted
time: 3ms
memory: 34472kb
input:
8 1 1 2 4 2 4 6 10000 5 2 6 6 2 1 3 7 3 8 2 8 1 5 7 5 1 2 7 3 2 3 5 3 8 4 3 5 8 2 4 5 3 4 3 2 1 8 6 6 8 4 5 3 1 6 3 1 2 7 4 6 4 8 6 4 3 5 4 7 6 8 5 11 2 1 6 5 2 7 1 3 3 5 4 4 6 1 7 2 7 6 2 7 8 4 1 3 3 4 6 7 3 7 1 6 38 3 4 6 6 3 4 8 1 5 3 1 8 8 6 2 3 6 7 8 8 4 2 3 7 3 3 6 7 7 5 7 5 8 8 5 4 5 7 1 8 5 ...
output:
NO NO NO NO YES NO NO NO NO NO NO NO NO NO NO YES NO NO YES NO NO NO NO NO YES NO YES NO NO NO YES YES NO NO NO NO NO NO YES NO NO NO NO NO NO NO NO NO NO NO YES NO NO NO NO NO NO NO NO NO YES NO NO NO NO NO NO NO NO NO NO NO NO NO NO YES NO NO NO NO NO NO NO NO NO NO NO NO NO NO YES NO NO NO NO NO ...
result:
ok 10000 token(s): yes count is 1568, no count is 8432
Test #8:
score: 0
Accepted
time: 5ms
memory: 34316kb
input:
7 1 2 3 1 2 5 10000 5 1 7 3 5 6 5 5 3 2 7 4 4 5 2 6 4 12 3 1 5 5 6 6 3 5 3 5 3 3 11 2 3 2 6 7 3 6 6 3 3 3 2 3 2 6 1 3 4 2 6 7 3 2 7 1 6 5 2 7 3 4 1 27 2 5 6 1 7 1 7 1 4 6 7 1 6 2 1 7 1 3 4 4 7 7 2 6 4 4 3 2 5 6 1 7 3 3 1 4 4 1 7 3 4 3 4 2 1 4 4 1 6 7 4 6 2 7 4 4 5 1 6 4 1 3 5 1 2 3 5 7 5 2 3 7 6 5 1...
output:
NO NO YES NO NO NO NO NO NO NO YES YES NO YES NO NO NO NO YES NO NO NO NO YES NO NO YES NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO YES NO NO YES NO YES YES NO YES YES NO NO NO NO NO NO NO NO NO NO YES NO NO NO NO NO NO NO NO YES NO YES NO NO NO NO YES YES YES YES YES YES YE...
result:
ok 10000 token(s): yes count is 2205, no count is 7795
Extra Test:
score: 0
Extra Test Passed