Submission #252418

#	Time	Username	Problem	Language	Result	Execution time	Memory
252418		Blagojce	Editor (BOI15_edi)	C++11	35 / 100	613 ms	7416 KiB

edi

#include <bits/stdc++.h> 
#define fr(i, n, m) for(int i = (n); i < (m); i ++)
#define pb push_back
#define st first
#define nd second
#define pq priority_queue
#define all(x) begin(x), end(x)
#include <time.h>
#include <cmath>

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;

const int i_inf = 1e9;
const ll inf = 1e18;
const ll mod = 1000000007;
const ld eps = 1e-13;
const ld pi  = 3.14159265359;
 
mt19937 _rand(time(NULL));
clock_t timer = clock();
const int mxn = 5e5;


int n;

int a[mxn];

void sub1(){
	bool ok[n];
	memset(ok, false, sizeof(ok));
	int ans = -1;
	
	int pr[n];
	memset(pr, -1, sizeof(pr));
	
	fr(i, 0, n){
		ok[i] = true;
		if(a[i] > 0){
			ans = i;
		}
		else{
			int pos = i;
			for(int j = i-1; j >= 0; j --){
				if(!ok[j]) continue;
				if(a[j] > 0){
					pr[pos] = j;
					ok[j] = false;
					break;
				} 
				else if(a[j] > a[pos]){
					pr[pos] = j;
					ok[j] = false;
					
					if(pr[j] == -1){
						break;
					}
					else{
						pos = pr[j];
						pr[j] = -1;
						
						ok[pos] = true;
						j = pos;		
						if(a[pos] >0) break;
					}
				}
			}
		}
		ans = i;
		while(ans >= 0 && (!ok[ans] || a[ans] < 0)){
			--ans;
		} 
		
		if(ans == -1){
			cout<<0<<endl;
		}
		else{
			cout<<a[ans] << endl;
		}
	}
}
void sub2(){
	int pr[n];
	memset(pr, -1, sizeof(pr));
	int ans = -1;
	fr(i, 0, n){
		if(a[i] < 0){
			if(ans != -1){
				ans = pr[ans];
			}
		}
		else{
			pr[i] = ans;
			ans = i;	
		}
		if(ans == -1) cout<<0<<endl;
		else cout<<a[ans]<<endl;
	}
}

int bit[mxn];
void update(int k, int val){
	while(k < mxn){
		bit[k] += val;
		k += k&-k;	
	}
}

int f(int p){
	int temp = 0;
	for(int i = 20; i >= 0; i --){
		if((1<<i) + temp < p){
			if(bit[temp+(1<<i)]){
				temp += (1<<i);
			}
		}
	}
	return temp;
}

void sub3(){
	
	vector<int> pos[n+1];
	
	bool ok[n+1];
	fr(i, 0, n){
		ok[i+1] = true;
		if(a[i] < 0){
			pos[-a[i]].pb(i+1);
		}
		update(i+1, 1);
	}
	for(int i = n; i >= 1; i --){
		for(auto u : pos[i]) update(u, -1);
		for(auto u : pos[i]){
			if(!ok[u]) continue;
			
			int ps = f(u);
			if(ps != 0) ok[ps] = false;
		}
	}
	int ans = 0;
	for(int i = n; i >= 1; i --){
		if(ok[i] && a[i-1] > 0){
			ans = a[i-1];
			break;
		}
	}
	fr(i, 0, n-1) cout<<0<<endl;
	cout<<ans<<endl;
}


void solve(){
	cin >> n;
	bool subtask1 = n<=5000;
	bool subtask2 = true;
	fr(i, 0, n){
		cin >> a[i];
		if(a[i] < -1) subtask2 = false;
	}
	if(subtask1){
		sub1();
	}
	else if(subtask2){
		sub2();
	}
	else{
		sub3();
	}
}

 
int main(){


	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	solve();
}

• Subtask 1: 20 / 20
• Subtask 2: 15 / 15
• Subtask 3: 0 / 28
• Subtask 4: 0 / 37