#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=1e5+50;
const int mod=1e9+7;
using namespace std;
int n,i,tt,mn[nmax],x,y,p[nmax],par[nmax][20],q,tp,rt,viz[nmax],l[nmax],vl[nmax];
vector<int>a[nmax];
set<pair<int,int> >s;
void dfs(int x)
{
mn[x]=x;
vector<pair<int,int> >vc;
for(int i=0;i<(int)a[x].size();i++)
{
int y=a[x][i];
dfs(y);
mn[x]=min(mn[x],mn[y]);
vc.pb(mkp(mn[y],y));
}
sort(vc.begin(),vc.end());
for(int i=0;i<(int)a[x].size();i++)a[x][i]=vc[i].sc;
}
void rec(int x)
{
for(int i=0;i<(int)a[x].size();i++)rec(a[x][i]);
vl[x]=++tt;
s.in(mkp(vl[x],x));
}
void build(int x)
{
par[x][0]=p[x];
l[x]=l[p[x]]+1;
for(int i=1;i<18;i++)par[x][i]=par[par[x][i-1]][i-1];
for(int i=0;i<(int)a[x].size();i++)build(a[x][i]);
}
int main()
{
//freopen("sol.in","r",stdin);
//freopen("sol.out","w",stdout);
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
cin>>n>>q;
for(i=1;i<=n;i++)
{
cin>>p[i];
if(!p[i])
{
rt=i;
continue;
}
a[p[i]].pb(i);
}
dfs(rt);
rec(rt);
build(rt);
//for(i=1;i<=n;i++)cout<<vl[i]<<" ";
//cout<<endl;
while(q--)
{
cin>>tp>>x;
if(tp==1)
{
for(i=1;i<=x;i++)
{
y=s.begin()->sc;
viz[s.begin()->sc]=1;
s.er(s.begin());
}
cout<<y<<'\n';
}
else
{
y=x;
for(i=17;i>=0;i--)if(viz[par[y][i]])y=par[y][i];
cout<<l[x]-l[y]<<'\n';
s.in(mkp(vl[y],y));
viz[y]=0;
}
}
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
2808 KB |
Output is correct |
2 |
Correct |
164 ms |
14584 KB |
Output is correct |
3 |
Correct |
91 ms |
14328 KB |
Output is correct |
4 |
Correct |
7 ms |
2680 KB |
Output is correct |
5 |
Correct |
7 ms |
2808 KB |
Output is correct |
6 |
Correct |
7 ms |
2936 KB |
Output is correct |
7 |
Correct |
7 ms |
2936 KB |
Output is correct |
8 |
Correct |
7 ms |
2936 KB |
Output is correct |
9 |
Correct |
14 ms |
3448 KB |
Output is correct |
10 |
Correct |
33 ms |
5624 KB |
Output is correct |
11 |
Correct |
182 ms |
14656 KB |
Output is correct |
12 |
Correct |
94 ms |
14328 KB |
Output is correct |
13 |
Correct |
141 ms |
14584 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
47 ms |
8696 KB |
Output is correct |
2 |
Correct |
239 ms |
26108 KB |
Output is correct |
3 |
Correct |
123 ms |
19300 KB |
Output is correct |
4 |
Correct |
88 ms |
10360 KB |
Output is correct |
5 |
Correct |
88 ms |
10232 KB |
Output is correct |
6 |
Correct |
83 ms |
10232 KB |
Output is correct |
7 |
Correct |
91 ms |
8952 KB |
Output is correct |
8 |
Correct |
54 ms |
8604 KB |
Output is correct |
9 |
Correct |
234 ms |
26616 KB |
Output is correct |
10 |
Correct |
264 ms |
26232 KB |
Output is correct |
11 |
Correct |
224 ms |
26104 KB |
Output is correct |
12 |
Correct |
232 ms |
22904 KB |
Output is correct |
13 |
Correct |
177 ms |
29048 KB |
Output is correct |
14 |
Correct |
130 ms |
19304 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
100 ms |
14712 KB |
Output is correct |
2 |
Correct |
254 ms |
23544 KB |
Output is correct |
3 |
Correct |
166 ms |
26872 KB |
Output is correct |
4 |
Correct |
156 ms |
21752 KB |
Output is correct |
5 |
Correct |
165 ms |
21372 KB |
Output is correct |
6 |
Correct |
176 ms |
21476 KB |
Output is correct |
7 |
Correct |
155 ms |
19192 KB |
Output is correct |
8 |
Correct |
178 ms |
26872 KB |
Output is correct |
9 |
Correct |
252 ms |
27000 KB |
Output is correct |
10 |
Correct |
257 ms |
26360 KB |
Output is correct |
11 |
Correct |
262 ms |
26488 KB |
Output is correct |
12 |
Correct |
246 ms |
23544 KB |
Output is correct |
13 |
Correct |
274 ms |
33292 KB |
Output is correct |
14 |
Correct |
180 ms |
20072 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
237 ms |
26872 KB |
Output is correct |
2 |
Correct |
241 ms |
23544 KB |
Output is correct |
3 |
Correct |
179 ms |
32592 KB |
Output is correct |
4 |
Correct |
235 ms |
26904 KB |
Output is correct |
5 |
Correct |
238 ms |
26360 KB |
Output is correct |
6 |
Correct |
209 ms |
26360 KB |
Output is correct |
7 |
Correct |
240 ms |
23544 KB |
Output is correct |
8 |
Correct |
190 ms |
32504 KB |
Output is correct |
9 |
Correct |
113 ms |
19308 KB |
Output is correct |