Submission #1307324

#	Time	Username	Problem	Language	Result	Execution time	Memory
1307324		mendeke	Financial Report (JOI21_financial)	C++20	5 / 100	201 ms	18076 KiB

Main

//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include<bits/stdc++.h>
#define ll long long
#define F first
#define S second
#define pb push_back
#define pf push_front
#define ppb pop_back
#define ppf pop_front
#define all(x) x.begin(), x.end()

const int mod = 1e9 + 7;
const int N = 500001;

using namespace std;

ll n, m, t[N * 4],mx[N];
pair <ll, ll> p[N];
vector <ll> v;

void upd (ll idx, ll val, ll tl = 1, ll tr = n, ll v = 1){
	if (tl == tr){
		t[v] = val;
		return;
	}
	ll tm = (tl + tr) / 2;
	if (tm < idx){
		upd (idx, val, tm + 1, tr, v + v + 1);
	}
	else{
		upd (idx, val, tl, tm, v + v);
	}
	t[v] = max (t[v + v], t[v + v + 1]);
}

ll get (ll l, ll r, ll tl = 1, ll tr = n, ll v = 1){
	if (tr < l || tl > r){
		return 0;
	}
	if (l <= tl && tr <= r){
		return t[v];
	}
	ll tm = (tl + tr) / 2;
	return max (get (l, r, tl, tm, v + v), get (l, r, tm + 1, tr, v + v + 1));
}

signed main (){
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	cin >> n >> m;
	for (int i = 1; i <= n; i++){
		cin >> p[i].F;
		p[i].S = i;
		if (p[i].F > p[i - 1].F){
			mx[i] = mx[i - 1] + 1;
		}
		else{
			mx[i] = 1;
		}
	}
	sort (p + 1, p + n + 1);
	ll mx = 0;
	for (int i = 1; i <= n; i++){
		if (p[i].F != p[i - 1].F){
			sort (all (v));
			reverse (all (v));
			for (auto j: v){
				upd (j, get (max (j - m, 1ll), j) + 1);
				if (j >= n - m){
					mx = max (mx, get (j, j));
				}
			}
			v.clear();
		}
		v.pb (p[i].S);
	}
	sort (all (v));
	reverse (all (v));
	for (auto j: v){
		upd (j, get (max (j - m, 1ll), j) + 1);
		if (j >= n - m){
			mx = max (mx, get (j, j));
		}
	}
	cout << mx;
}

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 20
• Subtask 4: 0 / 12
• Subtask 5: 5 / 5
• Subtask 6: 0 / 35