Submission #1112700

#	Time	Username	Problem	Language	Result	Execution time	Memory
1112700		raspy	Global Warming (CEOI18_glo)	C++17	17 / 100	34 ms	7560 KiB

glo

#include <bits/stdc++.h>

#define int long long
#define vi vector<int>
#define ii pair<int, int>
#define f first
#define s second
#define all(x) (x).begin(), (x).end()
#define P 31
#define mod 1'000'000'007
#define inf 1'000'000'000'000
#define pb push_back
#define str string
#define sz(x) (x).size()
#define vvi vector<vi>
#define fun function
#define oopt cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(false);
#define file freopen("problemname.in", "r", stdin); freopen("pr.out", "w", stdout);
#define dbg(v) cout << "Line(" << __LINE__ << ") -> " << #v << " = " << (v) << endl;

using namespace std;
template <class T, int SZ> using arr = array<T, SZ>;

void solve()
{
	int n, x;
	cin >> n >> x;
	vi a(n);
	for (int&v:a)
		cin >> v;
	vi lis;
	vi dis(n);
	vi t;
	for (int i = n-1; i >= 0; i--)
	{
		int tr = -a[i];
		if (t.empty() || tr > t.back())
			t.pb(tr);
		else
		{
			int ix = lower_bound(all(t), tr)-t.begin();
			t[ix] = tr;
		}
		dis[i] = t.size();
	}
	int rez = dis[0];
	for (int i = 0; i < n; i++)
	{
		if (lis.size() && lis.back() < a[i]+x)
		{
			rez = max(rez, (int)lis.size()+dis[i]);
		}
		// cout << i << " " << lis.size() << " " << dis[i] << "\n";
		if (lis.empty() || a[i] > lis.back())
			lis.pb(a[i]);
		else
		{
			int ix = lower_bound(all(lis), a[i])-lis.begin();
			lis[ix] = a[i];
		}
	}
	cout << rez << "\n";
}

signed main()
{
	oopt;
	int t = 1;
	// cin >> t;
	while (t--)
		solve();
	return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 13
• Subtask 4: 0 / 10
• Subtask 5: 0 / 20
• Subtask 6: 17 / 17
• Subtask 7: 0 / 25