QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#203899#7108. Couleurucup-team484AC ✓2464ms55992kbC++172.4kb2023-10-06 21:46:412023-10-06 21:46:41

Judging History

你现在查看的是最新测评结果

  • [2023-10-06 21:46:41]
  • 评测
  • 测评结果:AC
  • 用时:2464ms
  • 内存:55992kb
  • [2023-10-06 21:46:41]
  • 提交

answer

#include <bits/stdc++.h>
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()
#define st first
#define nd second
using namespace std;
typedef long long ll;
const int mod = 1e9 + 7;
const int N = 1e6 + 5;
vector<int> seg[N];

void build(int l, int r, int k, vector<int>& a) {
	if (l == r) {
		seg[k] = {a[l]};
		return;
	}
	int m = (l + r) / 2;
	build(l, m, k * 2, a);
	build(m + 1, r, k * 2 + 1, a);
	seg[k].clear();
	merge(all(seg[k * 2]), all(seg[k * 2 + 1]), back_inserter(seg[k]));
}

int count_smaller(int l, int r, int k, int x, int y, int v) {
	if (r < x || y < l || x > y) return 0;
	if (x <= l && r <= y)
		return lower_bound(all(seg[k]), v) - seg[k].begin();
	int m = (l + r) / 2;
	return count_smaller(l, m, k * 2, x, y, v) + count_smaller(m + 1, r, k * 2 + 1, x, y, v);
}

void solve() {
	int n; cin >> n;
	vector<int> a(n);
	vector<vector<int>> pos(n);
	for (int i = 0; i < n; i++)
		cin >> a[i], a[i]--, pos[a[i]].push_back(i);
	ll last = 0;
	vector<int> fen(n + 5);
	auto upd = [&](int i) {
		for (++i; i < n + 5; i += i & -i)
			fen[i]++;
	};
	auto qry = [&](int i) {
		ll r = 0;
		for (++i; i > 0; i -= i & -i)
			r += fen[i];
		return r;
	};
	for (int i = n - 1; i >= 0; i--) {
		for (int j = sz(pos[i]) - 1; j >= 0; j--) {
			last += qry(pos[i][j]);
			upd(pos[i][j]);
		}
	}
	build(0, n - 1, 1, a);
	set<int> bad;
	bad.insert(-1);
	bad.insert(n);
	multiset<ll> tmp;
	vector<ll> inv(n + 1);
	inv[0] = last;
	tmp.insert(last);
	for (int i = 0; i < n; i++) {
		last = *tmp.rbegin();
		cout << last << " \n"[i + 1 == n];
		ll p; cin >> p;
		p ^= last;
		p--;
		auto it = bad.lower_bound(p);
		int l = *prev(it) + 1, r = *it - 1;
		tmp.erase(tmp.find(inv[l]));
		ll tot = inv[l];
		if (p - l < r - p) {
			inv[l] = 0;
			for (int j = l; j <= p; j++) {
				tot -= count_smaller(0, n - 1, 1, p, r, a[j]);
				if (j < p)
					inv[l] += count_smaller(0, n - 1, 1, j + 1, p - 1, a[j]);
			}
			inv[p + 1] = tot - inv[l];
		} else {
			for (int j = p; j <= r; j++) {
				tot -= p - l + 1 - count_smaller(0, n - 1, 1, l, p, a[j] + 1);
				if (j > p)
					inv[p + 1] += count_smaller(0, n - 1, 1, j + 1, r, a[j]);
			}
			inv[l] = tot - inv[p + 1];
		}
		tmp.insert(inv[l]);
		tmp.insert(inv[p + 1]);
		bad.insert(p);
	}
}

int main() {
	ios_base::sync_with_stdio(false); cin.tie(0);
	int t; cin >> t; while (t--) solve();
}

这程序好像有点Bug,我给组数据试试?

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 27032kb

input:

3
5
4 3 1 1 1
5 4 5 3 1
10
9 7 1 4 7 8 5 7 4 8
21 8 15 5 9 2 4 5 10 6
15
4 8 8 1 12 1 10 14 7 14 2 9 13 10 3
37 19 23 15 7 2 10 15 2 13 4 5 8 7 10

output:

7 0 0 0 0
20 11 7 2 0 0 0 0 0 0
42 31 21 14 14 4 1 1 1 0 0 0 0 0 0

result:

ok 3 lines

Test #2:

score: 0
Accepted
time: 2464ms
memory: 55992kb

input:

11116
10
10 5 10 3 6 4 8 5 9 8
31 27 24 11 12 3 0 2 3 1
10
8 2 7 2 8 10 1 10 9 10
6 5 2 13 2 1 0 1 3 1
10
7 10 7 6 1 3 10 6 7 9
21 18 10 1 6 5 4 8 9 10
10
2 10 4 8 8 5 7 2 6 7
20 10 9 1 15 0 4 2 9 7
10
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
10
1 2 3 4 5 6 7 8 9 10
6 3 5 2 7 10 9 1 4 8
10
1 10 1 3...

output:

21 18 16 12 10 6 4 1 1 0
12 12 10 10 4 4 4 2 1 0
20 16 9 5 3 3 3 0 0 0
22 14 8 8 5 5 2 1 1 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
19 12 7 4 4 2 2 1 0 0
20 18 8 3 1 1 0 0 0 0
45 21 21 10 3 3 3 0 0 0
17 11 8 2 1 1 1 0 0 0
13 4 1 0 0 0 0 0 0 0
29 27 22 15 9 7 4 3 1 0
26 16 9 2 1 1 1 1 1 0
0 0 0 0 0 ...

result:

ok 11116 lines

Extra Test:

score: 0
Extra Test Passed