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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#358525 | #6303. Inversion | JCY_ | WA | 70ms | 17332kb | C++14 | 1.5kb | 2024-03-19 20:32:22 | 2024-03-19 20:32:24 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using i128 = __int128;
using u128 = unsigned __int128;
template <typename T>
void chkmax(T &x, const T &y) {
if (x < y) x = y;
}
template <typename T>
void chkmin(T &x, const T &y) {
if (y < x) x = y;
}
constexpr int MAXN = 2010;
int n, p[MAXN], rev[MAXN], num[MAXN][MAXN];
bool query(int l, int r) {
if (l == r) return false;
cout << "? " << l << " " << r << endl;
bool x;
cin >> x;
return x;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n;
p[1] = 1;
rev[1] = 1;
for (int i = 2; i <= n; ++i) {
auto check = [&](int pos) {
return query(pos, i) ^ (bool)num[pos][i - 1] ^ query(pos + 1, i) ^ num[pos + 1][i - 1];
};
int l = 1, r = i - 1, res = 0;
while (l <= r) {
int mid = (l + r) >> 1;
if (!check(rev[mid])) {
res = mid;
l = mid + 1;
} else {
r = mid - 1;
}
}
p[i] = res + 1;
rev[res + 1] = i;
for (int j = 1; j < i; ++j) {
if (p[j] > res) {
++p[j];
rev[p[j]] = j;
}
}
for (int j = i - 1; j >= 1; --j)
num[j][i] = num[j][i - 1] + num[j + 1][i] - num[j + 1][i - 1] + (p[j] > p[i]);
}
cout << "! ";
for (int i = 1; i <= n; ++i) cout << p[i] << " \n"[i == n];
cout << flush;
return 0;
}
/*
g++ F.cpp -o F -std=c++14 -O2 -Wall -Wextra -Wshadow -g -fsanitize=address,undefined
*/
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3660kb
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: 70ms
memory: 17332kb
input:
1993 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 1 0 1 0 1 0 0 1 1 1 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 1 1 0 1 0 1 1 1 1 0 1 0 0 0 0 0 0 0 0 1 1 0 1 0 0 0 0 1 0 0 1 0 1 0 1 1 1 1 0 1 0 0 0 0 0 0 0 1 1 0 0 1 0 1 0 1 0 0 1 0 0 0 1 0 1 0 0 1 0 0 1 1 0 0 0 1 0 0 0 1 1 0 1 0 0 0 1 1 0...
output:
? 1 2 ? 1 3 ? 2 3 ? 2 3 ? 2 4 ? 3 4 ? 3 4 ? 2 5 ? 3 5 ? 1 5 ? 2 5 ? 2 6 ? 3 6 ? 5 6 ? 1 6 ? 2 6 ? 1 7 ? 2 7 ? 5 7 ? 6 7 ? 1 8 ? 2 8 ? 5 8 ? 6 8 ? 7 8 ? 6 9 ? 7 9 ? 2 9 ? 3 9 ? 1 9 ? 2 9 ? 9 10 ? 8 10 ? 9 10 ? 5 10 ? 6 10 ? 6 11 ? 7 11 ? 2 11 ? 3 11 ? 9 11 ? 10 11 ? 11 12 ? 2 12 ? 3 12 ? 9 12 ? 10 12...
result:
wrong answer Wa.