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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#398839#6303. Inversiongqf123WA 1ms3644kbC++201.5kb2024-04-25 19:00:062024-04-25 19:00:08

Judging History

你现在查看的是最新测评结果

  • [2024-04-25 19:00:08]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:3644kb
  • [2024-04-25 19:00:06]
  • 提交

answer

#include<iostream>
#include<vector>
#include<algorithm>
#include<random>
using namespace std;
int vis[2001][2001], ans[2001], tree[2001], n;
inline int query(int l, int r) {
	if (l == r)
		return 0;
	if (~vis[l][r])
		return vis[l][r];
	cout << "? " << l << ' ' << r << endl;
	cin >> vis[l][r];
	return vis[l][r];
}
inline int ask(int x, int y) {
	if (x == y)
		return 0;
	if (x + 1 == y)
		return query(x, y);
	return (query(x, y) - query(x + 1, y) - query(x, y - 1) + query(x + 1, y - 1) + 50) % 2;
}
inline int sum(int p) {
	int ans = 0;
	for (; p; p ^= p & -p)
		ans += tree[p];
	return ans;
}
inline void add(int p, int v) {
	for (; p <= n; p += p & -p)
		tree[p] += v;
}
int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0), cout.tie(0);
	cin >> n;
	for (int i = 1; i <= n; ++i)
		for (int j = 1; j <= n; ++j)
			vis[i][j] = -1;
	for (int i = 1; i <= n; ++i)
		vis[i][i] = 0;
	vector<int>o;
	for (int i = 1; i <= n; ++i) {
		int l = 0, r = o.size(), mid;
		for (; l < r;) {
			mid = l + r >> 1;
			if (ask(o[mid], i))
				r = mid;
			else
				l = mid + 1;
		}
		o.insert(o.begin() + l, i);
		for (int j = 0; j ^ o.size(); ++j)
			ans[o[j]] = j + 1;
		for (int j = 1; j <= n; ++j) {
			tree[j] = 0;
		}
		add(ans[i], 1);
		for (int j = i - 1; j; --j) {
			vis[j][i] = (vis[j][i - 1] + i - j - sum(ans[j])) % 2;
			add(ans[j], 1);
		}
	}
	cout << "! ";
	for (int i = 1; i <= n; ++i)
		cout << ans[i] << ' ';
	cout << endl;
}

Details

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Test #1:

score: 0
Wrong Answer
time: 1ms
memory: 3644kb

input:

3
0
1
0

output:

? 1 2
? 2 3
? 1 3
! 1 3 2 

result:

wrong answer Wa.