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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#300427#6303. Inversionmendicillin2#WA 71ms30832kbC++171.6kb2024-01-08 11:09:082024-01-08 11:09:09

Judging History

你现在查看的是最新测评结果

  • [2024-01-08 11:09:09]
  • 评测
  • 测评结果:WA
  • 用时:71ms
  • 内存:30832kb
  • [2024-01-08 11:09:08]
  • 提交

answer

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

template <class T> using V = vector<T>;
template <class T> using VV = V<V<T>>;

using ll = int64_t;

const int N = 2010;

int id[N], a[N], ok[N][N], f[N][N];

inline bool qry(int l, int r) {
	if (ok[l][r]) return f[l][r];
	cout << "? " << l << ' ' << r << endl;
	bool cur;
	cin >> cur;
	f[l][r] = cur;
	ok[l][r] = 1;
	return cur;
}

int ni[N], t[N];

inline int lowbit(int x) { return x & (-x); }

inline void add(int x, int r) {
	for (int i = x; i <= r; i += lowbit(i)) t[i] ^= 1;
}

inline bool sum(int x) {
	bool now = 0;
	for (int i = x; i; i -= lowbit(i)) now ^= t[i];
	return now;
}

inline void build(int r) {
	for (int i = 1; i <= r; i ++) t[i] = 0;
	for (int i = r; i >= 1; i --) { ni[i] = sum(a[i]); add(a[i], r); }
}

inline bool check(int p, int x) {
	if (id[p] + 1 == x) return !qry(id[p], x);
	int a1 = qry(id[p], x), a2 = qry(id[p] + 1, x), a3 = ni[id[p]], a4 = ni[id[p] + 1];
	return !(a1 ^ a2 ^ a3 ^ a4);
}

int main() {
	ios_base::sync_with_stdio(false), cin.tie(nullptr);
	cout << fixed << setprecision(20);
	int n;
	cin >> n;
	id[1] = 1;
	a[1] = 1;
	for (int i = 2; i <= n; i ++) {
		int l = 1, r = i - 1, ans = 0;
		while (l <= r) {
			int mid = (l + r) >> 1;
			if (check(mid, i)) { ans = mid; l = mid + 1; }
			else r = mid - 1;
		}
		for (int j = i - 1; j > ans; j --) {
			a[id[j]] = j + 1;
			id[j + 1] = id[j];
		}
		id[ans + 1] = i;
		a[i] = ans + 1;
		build(i);
	} 
	cout << "! ";
	for (int i = 1; i < n; i ++) cout << a[i] << ' ';
	cout << a[n] << endl;
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 3588kb

input:

3
0
0
1

output:

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

result:

ok OK, guesses=3

Test #2:

score: -100
Wrong Answer
time: 71ms
memory: 30832kb

input:

1993
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
1
1
0
0
1
0
0
1
1
1
0
0
1
1
1
1
0
0
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
1
1
1
1
0
1
1
0
0
0
0
1
0
0
1
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
1
1
1
0
1
1
1
1
0
1
1
1
0
0
1
0
0
0
0
0
0
1
1
1
0
0
0
1
1
0
0
0
1
1
1
1
0
0
0
1
1
1
1
1
0
0
0
1
1
0
1
0
1
1
0
1
1
0
1
0
0
0
1
0
1
0...

output:

? 1 2
? 1 3
? 2 3
? 2 4
? 3 4
? 2 5
? 3 5
? 1 5
? 2 6
? 3 6
? 4 6
? 5 6
? 2 7
? 3 7
? 5 7
? 6 7
? 2 8
? 3 8
? 5 8
? 6 8
? 7 8
? 1 9
? 2 9
? 8 9
? 7 9
? 1 10
? 2 10
? 3 10
? 4 10
? 1 11
? 2 11
? 9 11
? 10 11
? 8 11
? 5 11
? 6 11
? 1 12
? 2 12
? 8 12
? 9 12
? 7 12
? 5 13
? 6 13
? 9 13
? 10 13
? 12 13
...

result:

wrong answer Wa.