Submission #159793

#	Time	Username	Problem	Language	Result	Execution time	Memory
159793		cookiedoth	Editor (BOI15_edi)	C++14	20 / 100	30 ms	1016 KiB

edi

/*

Code for problem editor by cookiedoth
Generated 24 Oct 2019 at 05.46 P


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*/

#include <iostream>
#include <fstream>
#include <vector>
#include <set>
#include <map>
#include <bitset>
#include <algorithm>
#include <iomanip>
#include <cmath>
#include <ctime>
#include <functional>
#include <unordered_set>
#include <unordered_map>
#include <string>
#include <queue>
#include <deque>
#include <stack>
#include <complex>
#include <cassert>
#include <random>
#include <cstring>
#include <numeric>
#define ll long long
#define ld long double
#define null NULL
#define all(a) a.begin(), a.end()
#define debug(a) cerr << #a << " = " << a << endl
#define forn(i, n) for (int i = 0; i < n; ++i)
#define sz(a) (int)a.size()

using namespace std;

template<class T> int chkmax(T &a, T b) {
	if (b > a) {
		a = b;
		return 1;
	}
	return 0;
}

template<class T> int chkmin(T &a, T b) {
	if (b < a) {
		a = b;
		return 1;
	}
	return 0;
}

template<class iterator> void output(iterator begin, iterator end, ostream& out = cerr) {
	while (begin != end) {
		out << (*begin) << " ";
		begin++;
	}
	out << endl;
}

template<class T> void output(T x, ostream& out = cerr) {
	output(x.begin(), x.end(), out);
}

void fast_io() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
}

const int mx = 5010;
int val[mx], ptr[mx], level[mx], active[mx];

void flip(int pos) {
	active[pos] ^= 1;
	if (level[pos] == 0) {
		return;
	}
	flip(ptr[pos]);
}

signed main() {
	fast_io();
	int n;
	cin >> n;
	for (int i = 0; i < n; ++i) {
		int x;
		cin >> x;
		if (x >= 0) {
			// cerr << "add" << endl;
			val[i] = x;
			active[i] = 1;
		}
		else {
			// cerr << "u" << -x << endl;
			level[i] = -x;
			active[i] = 1;
			ptr[i] = -1;
			for (int j = i - 1; i >= 0; --j) {
				if (level[j] < level[i] && active[j]) {
					flip(j);
					ptr[i] = j;
					break;
				}
			}
		}
		// output(active, active + n);
		int res = 0;
		for (int j = i; j >= 0; --j) {
			if (active[j] && level[j] == 0) {
				res = val[j];
				break;
			}
		}
		cout << res << "\n";
	}
}

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