Submission #75090

#	Time	Username	Problem	Language	Result	Execution time	Memory
75090		Nordway	Money (IZhO17_money)	C++14	100 / 100	820 ms	152304 KiB

money

#include<bits/stdc++.h>

#define f first
#define s second
#define pb push_back
#define mp make_pair
#define up_b upper_bound
#define low_b lower_bound
#define sz(x) (int)x.size()
#define all(v) v.begin(),v.end()
#define boost ios_base::sync_with_stdio(0),cin.tie(0),cout.tie()

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<int,ll> pil;
typedef pair<ll,int> pli;
typedef pair<ll,ll> pll;

const ll INF = 1e18;
const int inf = INT_MAX;
const ll mod = 1e9 + 7;
const int pi = acos(-1);
const int dx[4] = {0, 0, 1, -1};
const int dy[4] = {1, -1, 0, 0};
const int N = 1e6;
const int MAXN = 1e6 + 1;
int t[4 * MAXN], a[MAXN];

void upd(int v, int tl, int tr, int pos){
	if(tl == tr){
		t[v]++;
		return ;
	}
	int tm = (tl + tr) / 2;
	if(pos <= tm)upd(v * 2, tl, tm, pos);
	else upd(v * 2 + 1, tm + 1, tr, pos);
	t[v] = t[v * 2] + t[v * 2 + 1];
}
int get(int v, int tl, int tr, int l, int r){
	if(l > r || tl > r || l > tr)return 0;
	if(l <= tl && tr <= r)return t[v];
	int tm = (tl + tr) / 2;
	return get(v * 2, tl, tm, l, r) + get(v * 2 + 1, tm + 1, tr, l, r);
}


int main(){
	boost;
	int n;
	cin >> n;
	for(int i = 1; i <= n; i++){
		cin >> a[i];
	}
	int ans = 0;
	for(int i = 1; i <= n; ){
		int l = i, r = i + 1;
		ans++;
		while(r <= n){
			if(get(1, 1, N, a[l] + 1, a[r] - 1) > 0 || a[r] < a[r - 1])break;
			r++;
		}
		for(int j = l; j < r; j++)upd(1, 1, N, a[j]);
		i = r;
	}
	cout << ans;
}

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