Submission #1108680

#	Time	Username	Problem	Language	Result	Execution time	Memory
1108680		0pt1mus23	Ball Machine (BOI13_ballmachine)	C++14	12.86 / 100	199 ms	41716 KiB

ballmachine

#include <bits/stdc++.h>
using namespace std;
#define int long long int
#define ins insert      
#define pb push_back
#define endl '\n'
#define putr(x) cout<<x<<endl;return; 
#define all(x) x.begin(),x.end()
const int mod = 1e9 +7, sze = 1e5 +10, inf = LLONG_MAX, LG = 20;

vector<int> graph[sze];
int mn[sze];
int depth[sze];

set<pair<int,int>> bos;
int lan[sze];

int pp[sze];
int dd[sze];
int up[LG][sze];

void dfs(int node,int par=0){
    mn[node]=inf;
    pp[node]=par;
    up[0][node]=par;
    for(int i=1;i<LG;i++){
        up[i][node]=up[i-1][up[i-1][node]];
    }

    for(auto v:graph[node]){
        if(v!=par){
            depth[v]=depth[node]+1;
            dfs(v,node);
            mn[node]=min({mn[node],mn[v],v});
            // deg++;
            dd[node]++;
        }
    }
    if(dd[node]==0){
        bos.ins({mn[node],node});
    }
}

void rush(){
    int n,q;
    cin>>n>>q;
    int root=0;
    for(int i=1;i<=n;i++){
        int x;cin>>x;
        if(x){
            graph[i].pb(x);
            graph[x].pb(i);
        }
        else{
            root=i;
        }
    }
    dfs(root,0);
    while(q--){
        int op;
        int node;
        cin>>op>>node;
        if(op==1){
            int last= 0;
            while(node--){
                if(bos.empty()){
                    putr("bitdi");
                    // assert(0);
                }
                auto yalvar = *bos.begin();
                bos.erase(bos.begin());
                lan[yalvar.second]=1;
                last= yalvar.second;
                // cout<<last<<" aee "<<pp[last]<<endl;

                if(pp[last]){
                    --dd[pp[last]];
                    if(dd[pp[last]]==0){
                        bos.insert({mn[pp[last]],pp[last]});
                    }
                }
            }
            cout<<last<<endl;
        }
        else{
            int emp = node;
            for(int i= LG-1;i>=0;i--){
                if(lan[up[i][emp]]){
                    emp = up[i][emp];
                }
            }
            lan[emp]=0;
            int surus = depth[node] - depth[emp];
            // cout<<"ulan "<<emp<<endl;
            cout<<surus<<endl;
            if(pp[emp]){
                dd[pp[emp]]++;
            }
            bos.insert({mn[emp],emp});
        }
    }

}
 
signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
 
    int tt = 1; 
    // cin>>tt;
 
    while(tt--){
        rush();
    }
 
    return 0;
}

• Subtask 1: 0 / 25
• Subtask 2: 4.285714285714286 / 30
• Subtask 3: 8.571428571428571 / 40
• Subtask 4: 0 / 5