Submission #283239

#	Time	Username	Problem	Language	Result	Execution time	Memory
283239		AKaan37	Ball Machine (BOI13_ballmachine)	C++17	20.95 / 100	1101 ms	30072 KiB

ballmachine

//Bismillahirrahmanirrahim
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#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target ("avx2")

#include <bits/stdc++.h>

using namespace std;

typedef long long lo;
typedef pair< lo,lo > PII;

#define fi first
#define se second
#define mp make_pair
#define endl "\n"
#define int long long
#define pb push_back
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)

const lo inf = 1000000000000000000;
const lo KOK = 100000;
const lo LOG = 30;
const lo li = 500005;
const lo mod = 1000000007;

int n,m,b[li],a[li],k,flag,t,vis[li],root,par[li][LOG],last,mini[li];
int cev;
multiset<PII> st;
string s;
vector<int> v;

inline void build_lca(){
	for(int i=1;i<=17;i++){
		for(int j=1;j<=n;j++)par[j][i]=par[par[j][i-1]][i-1];
	}
}

int32_t main(void){
	scanf("%lld %lld",&n,&t);
	FOR{
		int x;
		scanf("%lld",&x);
		if(x==0){
			root=x;
		}
		else{
			vis[x]++;
			par[i][0]=x;
		}
	}
	FOR{
		if(vis[i]==0)st.insert({i,i});
		mini[i]=i;
	}
	build_lca();
	vis[0]=1000000;
	while(t--){
		int type;
		scanf("%lld",&type);
		if(type==1){
			scanf("%lld",&k);
			while(k){
				k--;
				auto it=st.begin();
				PII p=*it;
				last=p.se;
				//~ if(last==212)cout<<k<<"**\n";
				//~ cout<<last<<endl;
				vis[par[p.se][0]]--;
				if(vis[par[p.se][0]]==0){mini[par[p.se][0]]=min(par[p.se][0],p.fi);st.insert({min(par[p.se][0],p.fi),par[p.se][0]});}
				st.erase(it);
			}
			printf("%lld\n",last);
			continue;
		}
		int x;
		scanf("%lld",&x);
		//~ int y=x;
		cev=0;
		for(int i=17;i>=0;i--){
			if(vis[par[x][i]] || st.find({mini[par[x][i]],par[x][i]})!=st.end())continue;
			x=par[x][i];
			cev+=(1<<i);
		}
		if(st.find({mini[par[x][0]],par[x][0]})!=st.end()){st.erase(st.find({mini[par[x][0]],par[x][0]}));}
		vis[par[x][0]]++;
		st.insert({mini[x],x});
		printf("%lld\n",cev);
	}
	return 0;
}

Compilation message (stderr)

ballmachine.cpp: In function 'int32_t main()':
ballmachine.cpp:48:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   48 |  scanf("%lld %lld",&n,&t);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~
ballmachine.cpp:51:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   51 |   scanf("%lld",&x);
      |   ~~~~~^~~~~~~~~~~
ballmachine.cpp:68:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   68 |   scanf("%lld",&type);
      |   ~~~~~^~~~~~~~~~~~~~
ballmachine.cpp:70:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   70 |    scanf("%lld",&k);
      |    ~~~~~^~~~~~~~~~~
ballmachine.cpp:86:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   86 |   scanf("%lld",&x);
      |   ~~~~~^~~~~~~~~~~

• Subtask 1: 0 / 25
• Subtask 2: 10.714285714285714 / 30
• Subtask 3: 8.571428571428571 / 40
• Subtask 4: 1.6666666666666667 / 5