#include <bits/stdc++.h>
using namespace std;
const int N = 100*1000+5;
int par[N];
vector<pair<int,int> > g[N];
int depth[N];
int d[N][25];
int sub[N];
void dfs(int v,int p = 0){
depth[v] = depth[p]+1;
d[v][0] = par[v];
sub[v] = v;
for(int i = 0;i<g[v].size();i++){
int to = g[v][i].second;
if(to == p) continue;
dfs(to,v);
sub[v] = min(sub[v],sub[to]);
g[v][i].first = sub[to];
}
sort(g[v].begin(),g[v].end());
}
pair<int,int> lca(int u,int v){
bool f = false;
if(depth[u]>depth[v]){
swap(u,v);
f = true;
}
int dif = depth[v]-depth[u];
for(int i = 0;i<=20;i++){
if((dif>>i)&1) v = d[v][i];
}
if(u == v) return {u,u};
// cout<<u<< " "<<v<<endl;
for(int i = 20;i>=0;i--){
if(d[u][i] == d[v][i]) continue;
u = d[u][i];
v = d[v][i];
}
if(f) swap(u,v);
return {u,v};
}
vector<int> all;
bool cmp(int u,int v){
pair<int,int> x = lca(u,v);
if(x.first == x.second) return depth[u]>depth[v];
return sub[x.first]<sub[x.second];
}
int hrt[N];
bool used[N];
void go(int v,int p = -1){
for(int i = 0;i<g[v].size();i++){
int to = g[v][i].second;
if(to == p) continue;
go(to,v);
}
all.push_back(v);
}
int main(){
ios_base::sync_with_stdio(false);
int n,q;
cin>>n>>q;
for(int i = 1;i<=n;i++){
int x;
cin>>x;
if(!x) x = -1;
par[i] = x;
g[i].push_back({0,x});
g[x].push_back({0,i});
}
memset(d,-1,sizeof(d));
dfs(1);
for(int k = 1;k<=20;k++){
for(int i = 1;i<=n;i++){
if(d[i][k-1]!=-1){
d[i][k] = d[d[i][k-1]][k-1];
}
}
}
go(1);
// for(int i = 1;i<=n;i++) all.push_back(i);
// sort(all.begin(),all.end(),cmp);
//for(int i = 0;i<all.size();i++) cout<<all[i]<<" ";
//cout<<endl;
set<pair<int,int> > ms;
for(int i = 0;i<all.size();i++){
ms.insert({i,all[i]});
hrt[all[i]] = i;
}
/*int x,y;
while(cin>>x>>y){
pair<int,int> w = lca(x,y);
cout<<w.first<<" "<<w.second<<endl;
}*/
while(q--){
int tp;
cin>>tp;
if(tp == 1){
int k;
cin>>k;
while(k--){
pair<int,int> x = *(ms.begin());
ms.erase(ms.begin());
used[x.second] = 1;
if(!k){
cout<<x.second<<endl;
}
}
}
else{
int x;
cin>>x;
int ans = 0;
while(used[x]){
int pr = par[x];
if(pr == -1 || !used[pr]){
ms.insert({hrt[x],x});
used[x] = 0;
break;
}
ans++;
x = par[x];
}
// used[x] = 0;
// ms.insert({hrt[x],x});
cout<<ans<<endl;
}
}
return 0;
}
Compilation message
ballmachine.cpp: In function 'void dfs(int, int)':
ballmachine.cpp:13:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 0;i<g[v].size();i++){
~^~~~~~~~~~~~
ballmachine.cpp: In function 'void go(int, int)':
ballmachine.cpp:51:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 0;i<g[v].size();i++){
~^~~~~~~~~~~~
ballmachine.cpp: In function 'int main()':
ballmachine.cpp:85:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 0;i<all.size();i++){
~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
1080 ms |
12536 KB |
Time limit exceeded |
| 2 |
Execution timed out |
1079 ms |
19828 KB |
Time limit exceeded |
| 3 |
Incorrect |
357 ms |
20212 KB |
Output isn't correct |
| 4 |
Execution timed out |
1085 ms |
12536 KB |
Time limit exceeded |
| 5 |
Execution timed out |
1079 ms |
12536 KB |
Time limit exceeded |
| 6 |
Incorrect |
15 ms |
12792 KB |
Output isn't correct |
| 7 |
Execution timed out |
1081 ms |
12664 KB |
Time limit exceeded |
| 8 |
Execution timed out |
1087 ms |
12536 KB |
Time limit exceeded |
| 9 |
Execution timed out |
1075 ms |
12920 KB |
Time limit exceeded |
| 10 |
Execution timed out |
1081 ms |
14328 KB |
Time limit exceeded |
| 11 |
Execution timed out |
1077 ms |
19828 KB |
Time limit exceeded |
| 12 |
Incorrect |
355 ms |
20224 KB |
Output isn't correct |
| 13 |
Execution timed out |
1083 ms |
19968 KB |
Time limit exceeded |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
266 ms |
15864 KB |
Output isn't correct |
| 2 |
Execution timed out |
1087 ms |
25692 KB |
Time limit exceeded |
| 3 |
Incorrect |
391 ms |
23280 KB |
Output isn't correct |
| 4 |
Execution timed out |
1076 ms |
16904 KB |
Time limit exceeded |
| 5 |
Execution timed out |
1086 ms |
16632 KB |
Time limit exceeded |
| 6 |
Execution timed out |
1078 ms |
17012 KB |
Time limit exceeded |
| 7 |
Execution timed out |
1078 ms |
16248 KB |
Time limit exceeded |
| 8 |
Incorrect |
269 ms |
15924 KB |
Output isn't correct |
| 9 |
Execution timed out |
1084 ms |
26732 KB |
Time limit exceeded |
| 10 |
Execution timed out |
1084 ms |
25580 KB |
Time limit exceeded |
| 11 |
Incorrect |
420 ms |
25712 KB |
Output isn't correct |
| 12 |
Execution timed out |
1077 ms |
26100 KB |
Time limit exceeded |
| 13 |
Incorrect |
404 ms |
26868 KB |
Output isn't correct |
| 14 |
Incorrect |
389 ms |
23384 KB |
Output isn't correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
1075 ms |
19320 KB |
Time limit exceeded |
| 2 |
Execution timed out |
1087 ms |
25712 KB |
Time limit exceeded |
| 3 |
Execution timed out |
1081 ms |
25204 KB |
Time limit exceeded |
| 4 |
Execution timed out |
1070 ms |
24116 KB |
Time limit exceeded |
| 5 |
Execution timed out |
1088 ms |
23416 KB |
Time limit exceeded |
| 6 |
Execution timed out |
1082 ms |
24212 KB |
Time limit exceeded |
| 7 |
Execution timed out |
1073 ms |
22900 KB |
Time limit exceeded |
| 8 |
Execution timed out |
1071 ms |
25108 KB |
Time limit exceeded |
| 9 |
Execution timed out |
1072 ms |
26664 KB |
Time limit exceeded |
| 10 |
Execution timed out |
1073 ms |
25384 KB |
Time limit exceeded |
| 11 |
Execution timed out |
1062 ms |
26240 KB |
Time limit exceeded |
| 12 |
Execution timed out |
1037 ms |
25560 KB |
Time limit exceeded |
| 13 |
Execution timed out |
1086 ms |
28912 KB |
Time limit exceeded |
| 14 |
Incorrect |
494 ms |
23152 KB |
Output isn't correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Execution timed out |
1082 ms |
26740 KB |
Time limit exceeded |
| 2 |
Execution timed out |
1085 ms |
25328 KB |
Time limit exceeded |
| 3 |
Incorrect |
442 ms |
28668 KB |
Output isn't correct |
| 4 |
Execution timed out |
1069 ms |
26876 KB |
Time limit exceeded |
| 5 |
Execution timed out |
1085 ms |
25196 KB |
Time limit exceeded |
| 6 |
Incorrect |
546 ms |
26352 KB |
Output isn't correct |
| 7 |
Execution timed out |
1080 ms |
25200 KB |
Time limit exceeded |
| 8 |
Incorrect |
424 ms |
28528 KB |
Output isn't correct |
| 9 |
Incorrect |
386 ms |
23324 KB |
Output isn't correct |
