Submission #884489

#	Time	Username	Problem	Language	Result	Execution time	Memory
884489		tsumondai	Money (IZhO17_money)	C++14	0 / 100	4 ms	22264 KiB

money

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define foru(i, l, r) for(int i = l; i <= r; i++)
#define ford(i, r, l) for(int i = r; i >= l; i--)
#define __TIME  (1.0 * clock() / CLOCKS_PER_SEC)

typedef pair<int, int> ii;
typedef pair<ii, int> iii;
typedef pair<ii, ii> iiii;

const int N = 1e6 + 10;

const int oo = 1e9, mod = 1e9 + 7;

int n, m, k, a[N + 5];
vector<int> bit1(N + 5, 0), bit2(N + 5, 0);

int bit[N];
void update(int x) {
	for (int i = x; i < N; i += i & -i) {
		bit[i]++;
	}
}

int get(int x) {
	int ans = 0;
	for (int i = x; i > 0; i -= i & -i) {
		ans += bit[i];
	}

	return ans;
}

void updateRange(int l, int r) {
	for (int i = l; i <= r; i++) {
		update(a[i]);
	}
}


void process() {
	cin >> n;
	foru(i, 1, n) cin >> a[i];
	int ans = 0, pre = 0;
	foru(i, 1, n - 1) {
		if (i < n && a[i] > a[i + 1]) {
			ans++;
			updateRange(pre + 1, i);
			pre = i;
			continue;
		}
		if (a[i] == a[i + 1]) continue;

		if (get(a[i + 1]) - get(a[pre + 1]) > 0) {
			ans++;
			updateRange(pre + 1, i);
			pre = i;
		}
	}
	cout << ans + 1;
	return;
}

signed main() {
	cin.tie(0)->sync_with_stdio(false);
	//freopen(".inp", "r", stdin);
	//freopen(".out", "w", stdout);
	process();
	cerr << "Time elapsed: " << __TIME << " s.\n";
	return 0;
}

// dont stop

• Subtask 1: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 20
• Subtask 4: 0 / 55