Submission #283157

#	Time	Username	Problem	Language	Result	Execution time	Memory
283157		AKaan37	Ball Machine (BOI13_ballmachine)	C++17	20.95 / 100	1099 ms	15628 KiB

ballmachine

//Bismillahirrahmanirrahim
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#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 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;
int cev;
set<int> 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];
	}
}

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

Compilation message (stderr)

ballmachine.cpp: In function 'int main()':
ballmachine.cpp:78:7: warning: unused variable 'y' [-Wunused-variable]
   78 |   int y=x;
      |       ^
ballmachine.cpp:42:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   42 |  scanf("%d %d",&n,&t);
      |  ~~~~~^~~~~~~~~~~~~~~
ballmachine.cpp:45:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   45 |   scanf("%d",&x);
      |   ~~~~~^~~~~~~~~
ballmachine.cpp:61:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   61 |   scanf("%d",&type);
      |   ~~~~~^~~~~~~~~~~~
ballmachine.cpp:63:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   63 |    scanf("%d",&k);
      |    ~~~~~^~~~~~~~~
ballmachine.cpp:77:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   77 |   scanf("%d",&x);
      |   ~~~~~^~~~~~~~~

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