#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1e5+7;
const int LOG = 19;
int jp[MAXN][LOG];
int ojciec[MAXN];
int depth[MAXN];
int mini[MAXN];
int post[MAXN];
bool ball[MAXN];
vector<int> g[MAXN];
set<pair<int,int> > s;
int cnt=0;
void DFS(int x){
//cout<<"wchodze x="<<x<<'\n';
depth[x]=depth[ojciec[x]]+1;
vector<pair<int,int> > vec;
for(int i=0;i<g[x].size();i++){
vec.push_back({mini[g[x][i]], g[x][i]});
//cout<<g[x][i]<<' '<<mini[g[x][i]]<<'\n';
}
sort(vec.begin(),vec.end());
for(int i=0;i<vec.size();i++) DFS(vec[i].second);
s.insert({++cnt,x});
post[x]=cnt;
}
void DFS1(int x){
for(int i=0;i<g[x].size();i++){
DFS1(g[x][i]);
}
mini[x]=x;
for(int i=0;i<g[x].size();i++) mini[x]=min(mini[x],g[x][i]);
}
int main(){
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int n,q,x,r,a,b;
pair<int,int> p;
cin>>n>>q;
for(int i=1;i<=n;i++){
cin>>x;
ojciec[i]=x;
if(x==0) r=i;
else g[x].push_back(i);
}
DFS1(r);
DFS(r);
while(q--){
cin>>a>>b;
if(a==1){
while(b--){
auto it=s.begin();
s.erase(it);
p=*it;
ball[p.second]=1;
if(b==0){
cout<<p.second<<'\n';
}
}
}
else{
x=b;
while(x>0){
if(ball[ojciec[x]]) x=ojciec[x];
else break;
}
ball[x]=0;
s.insert({mini[x],x});
cout<<depth[b]-depth[x]<<'\n';
}
}
return 0;
}
Compilation message
ballmachine.cpp: In function 'void DFS(int)':
ballmachine.cpp:18:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
18 | for(int i=0;i<g[x].size();i++){
| ~^~~~~~~~~~~~
ballmachine.cpp:23:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
23 | for(int i=0;i<vec.size();i++) DFS(vec[i].second);
| ~^~~~~~~~~~~
ballmachine.cpp: In function 'void DFS1(int)':
ballmachine.cpp:28:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
28 | for(int i=0;i<g[x].size();i++){
| ~^~~~~~~~~~~~
ballmachine.cpp:32:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
32 | for(int i=0;i<g[x].size();i++) mini[x]=min(mini[x],g[x][i]);
| ~^~~~~~~~~~~~
ballmachine.cpp: In function 'int main()':
ballmachine.cpp:46:5: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
46 | DFS(r);
| ~~~^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
4696 KB |
Output isn't correct |
| 2 |
Execution timed out |
1059 ms |
9984 KB |
Time limit exceeded |
| 3 |
Incorrect |
42 ms |
9812 KB |
Output isn't correct |
| 4 |
Execution timed out |
1030 ms |
4696 KB |
Time limit exceeded |
| 5 |
Incorrect |
1 ms |
4696 KB |
Output isn't correct |
| 6 |
Incorrect |
1 ms |
4700 KB |
Output isn't correct |
| 7 |
Execution timed out |
1097 ms |
4700 KB |
Time limit exceeded |
| 8 |
Incorrect |
1 ms |
4700 KB |
Output isn't correct |
| 9 |
Incorrect |
4 ms |
4956 KB |
Output isn't correct |
| 10 |
Execution timed out |
1065 ms |
5980 KB |
Time limit exceeded |
| 11 |
Incorrect |
62 ms |
9808 KB |
Output isn't correct |
| 12 |
Incorrect |
43 ms |
9728 KB |
Output isn't correct |
| 13 |
Incorrect |
74 ms |
10064 KB |
Output isn't correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
23 ms |
8796 KB |
Output isn't correct |
| 2 |
Incorrect |
170 ms |
18312 KB |
Output isn't correct |
| 3 |
Incorrect |
47 ms |
11652 KB |
Output isn't correct |
| 4 |
Execution timed out |
1048 ms |
9052 KB |
Time limit exceeded |
| 5 |
Incorrect |
51 ms |
9296 KB |
Output isn't correct |
| 6 |
Incorrect |
43 ms |
8968 KB |
Output isn't correct |
| 7 |
Execution timed out |
1072 ms |
7956 KB |
Time limit exceeded |
| 8 |
Incorrect |
21 ms |
8792 KB |
Output isn't correct |
| 9 |
Incorrect |
79 ms |
18516 KB |
Output isn't correct |
| 10 |
Incorrect |
179 ms |
18628 KB |
Output isn't correct |
| 11 |
Incorrect |
71 ms |
18256 KB |
Output isn't correct |
| 12 |
Incorrect |
74 ms |
15444 KB |
Output isn't correct |
| 13 |
Incorrect |
98 ms |
22416 KB |
Output isn't correct |
| 14 |
Incorrect |
55 ms |
11816 KB |
Output isn't correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
723 ms |
11600 KB |
Output is correct |
| 2 |
Execution timed out |
1063 ms |
15188 KB |
Time limit exceeded |
| 3 |
Execution timed out |
1047 ms |
20420 KB |
Time limit exceeded |
| 4 |
Execution timed out |
1060 ms |
15596 KB |
Time limit exceeded |
| 5 |
Incorrect |
924 ms |
15640 KB |
Output isn't correct |
| 6 |
Execution timed out |
1039 ms |
15404 KB |
Time limit exceeded |
| 7 |
Incorrect |
805 ms |
13448 KB |
Output isn't correct |
| 8 |
Execution timed out |
1067 ms |
20324 KB |
Time limit exceeded |
| 9 |
Execution timed out |
1060 ms |
18260 KB |
Time limit exceeded |
| 10 |
Execution timed out |
1046 ms |
18104 KB |
Time limit exceeded |
| 11 |
Execution timed out |
1029 ms |
18104 KB |
Time limit exceeded |
| 12 |
Execution timed out |
1067 ms |
15244 KB |
Time limit exceeded |
| 13 |
Execution timed out |
1099 ms |
24400 KB |
Time limit exceeded |
| 14 |
Correct |
75 ms |
11988 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
979 ms |
18616 KB |
Output isn't correct |
| 2 |
Incorrect |
936 ms |
15684 KB |
Output isn't correct |
| 3 |
Execution timed out |
1054 ms |
24832 KB |
Time limit exceeded |
| 4 |
Execution timed out |
1062 ms |
18544 KB |
Time limit exceeded |
| 5 |
Incorrect |
807 ms |
18512 KB |
Output isn't correct |
| 6 |
Incorrect |
78 ms |
18352 KB |
Output isn't correct |
| 7 |
Incorrect |
886 ms |
15692 KB |
Output isn't correct |
| 8 |
Execution timed out |
1072 ms |
25080 KB |
Time limit exceeded |
| 9 |
Incorrect |
49 ms |
11732 KB |
Output isn't correct |
