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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#594254 | #6303. Inversion | shiqiaqiaya# | WA | 61ms | 34840kb | C++20 | 1.9kb | 2024-09-27 20:36:26 | 2024-09-27 20:36:27 |
Judging History
answer
#include <bits/stdc++.h>
#define int long long
using namespace std;
mt19937 rnd(time(0));
signed main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n;
cin >> n;
vector<int> a;
a.push_back(1);
vector vis(n + 1, vector<int> (n + 1, -1));
vector<int> f(n + 1);
auto ask = [&](int l, int r) -> int {
if (l >= r) return 0;
if (vis[l][r] != -1) return vis[l][r];
cout << "? " << l << " " << r << endl;
int x;
cin >> x;
return vis[l][r] = x;
};
auto compare = [&](int x, int y) -> bool {
int a = ask(x, y - 1);
int b = ask(x + 1, y);
int c = ask(x, y);
int d = ask(x + 1, y - 1);
if ((a + b + c - d + 2) % 2 == 0) return false;
return true;
};
auto cp = [&](int x, int y) -> bool {
if ((f[x] + f[y]) & 1) {
return f[x] ? true : false;
}
int a = ask(x, y - 1);
int b = ask(x + 1, y);
int c = ask(x, y);
int d = ask(x + 1, y - 1);
if ((a + b + c - d + 2) % 2 == 0) return false;
return true;
};
// int p = rnd() % n + 1;
// for (int i = 1; i <= n; i++) {
// if (i == p) continue;
// f[i] = compare(min(p, i), max(p, i)) ^ (i > p);
// }
vector<int> p;
for (int i = 2; i <= n; i++) {
p.push_back(i);
}
random_shuffle(p.begin(), p.end());
for (int i : p) {
int L = 0, R = a.size() - 1, res = -1;
while (L <= R) {
int mid = (L + R) / 2;
if (!cp(a[mid], i)) {
res = mid;
L = mid + 1;
} else {
R = mid - 1;
}
}
a.insert(a.begin() + res + 1, i);
}
vector<int> ans(n + 1);
for (int i = 0; i < n; i++) {
ans[a[i]] = i + 1;
}
cout << "! ";
for (int i = 1; i <= n; i++) {
cout << ans[i] << " \n"[i == n];
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3612kb
input:
3 0 1 0
output:
? 1 2 ? 2 3 ? 1 3 ! 2 3 1
result:
ok OK, guesses=3
Test #2:
score: -100
Wrong Answer
time: 61ms
memory: 34840kb
input:
1993 1 1 1 0 1 1 1 1 0 0 0 0 0 0 0 1 0 1 1 1 0 0 1 0 1 1 0 1 0 0 0 0 1 1 0 1 1 1 0 1 1 0 1 0 0 0 1 0 1 1 0 1 0 0 1 1 1 1 0 1 0 0 1 1 1 0 1 1 1 0 1 1 0 1 1 0 0 1 1 0 1 0 0 1 1 1 0 0 1 1 1 0 0 1 1 0 0 0 1 0 0 1 1 1 1 1 0 1 0 1 0 0 1 1 1 0 0 1 1 1 0 0 0 1 0 1 0 0 1 1 1 0 0 1 1 1 0 0 1 1 1 1 0 0 0 0 0 0...
output:
? 1 1205 ? 2 1206 ? 1 1206 ? 2 1205 ? 1 1191 ? 2 1192 ? 1 1192 ? 2 1191 ? 1 702 ? 2 703 ? 1 703 ? 2 702 ? 1 1769 ? 2 1770 ? 1 1770 ? 2 1769 ? 1206 1769 ? 1207 1770 ? 1206 1770 ? 1207 1769 ? 1 1060 ? 2 1061 ? 1 1061 ? 2 1060 ? 1 707 ? 2 708 ? 1 708 ? 2 707 ? 708 1132 ? 709 1133 ? 708 1133 ? 709 1132 ...
result:
wrong output format Unexpected end of file - int32 expected