Submission #1112869

#	Time	Username	Problem	Language	Result	Execution time	Memory
1112869		adiyer	Money (IZhO17_money)	C++17	100 / 100	518 ms	31560 KiB

money

#include <bits/stdc++.h>
 
#define ios ios_base::sync_with_stdio(0); cin.tie(0);
#define pb push_back
 
using namespace std;
 
typedef long long ll;
 
const int N = 2e6 + 11;
const int MAX = 1e6;
 
ll n, res, ans;
ll a[N], t[4 * N];
 
void upd(ll k, ll x, ll v = 1, ll l = 1, ll r = MAX){
	if(l == r){
		t[v] += x;
		return;
	}
	ll md = (l + r) / 2;
	if(k <= md) upd(k, x, v + v, l, md);
	else upd(k, x, v + v + 1, md + 1, r);
	t[v] = t[v + v] + t[v + v + 1];
}
 
ll get(ll tl, ll tr, ll v = 1, ll l = 1, ll r = MAX){
	if(r < tl || tr < l) return 0;
	if(tl <= l && r <= tr) return t[v];
	ll md = (l + r) / 2;
	return get(tl, tr, v + v, l, md) + get(tl, tr, v + v + 1, md + 1, r);
}
 
void sol(){
	cin >> n, res = ans = 0;
	for(ll i = 1; i <= n; i++) cin >> a[i];
	for(ll i = 1; i <= n;){
		ll j = i;
		while(j <= n && a[j] <= a[j + 1] && get(a[i] + 1, a[j + 1] - 1) == 0) j++;
		while(i <= j) upd(a[i], 1), i++;
		res++;
	}
	cout << res;
}
 
signed main(){
	ios                     
	sol();
// 	slow();
//  stress();
}

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 20 / 20
• Subtask 4: 55 / 55