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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#210141 | #6303. Inversion | Cedeat | WA | 68ms | 18960kb | C++20 | 2.7kb | 2023-10-11 03:02:26 | 2023-10-11 03:02:26 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define dbg(x...) \
do { \
std::cout << #x << " -> "; \
err(x); \
} while (0)
void err() {
std::cout << std::endl;
}
template <class T, class... Ts>
void err(T arg, Ts ...args) {
std::cout << arg << ' ';
err(args...);
}
using ll = long long;
void Solve(int tCase) {
int n;
cin >> n;
vector f(n + 1, vector<int> (n + 1, -1));
int tot = 0;
auto ask = [&] (int l, int r) {
if (l == r) return 0;
++tot;
assert(tot <= 40000);
cout << "? " << l << ' ' << r << endl;
int x;
cin >> x;
return x;
};
auto get = [&] (int l, int r) {
if (f[l][r] == -1) {
return f[l][r] = ask(l, r);
}
return f[l][r];
};
auto check = [&] (int l, int r) {
if (l == r) return 1;
bool ok = false;
if (l > r) {
swap(l, r);
ok = true;
}
if (l + 1 == r) {
return get(l, r) ^ ok;
}
int a = get(l, r);
int b = get(l + 1, r);
int c = get(l, r - 1);
int d = get(l + 1, r - 1);
return (((a - b - c + d) % 2 + 2) % 2) ^ ok;
};
vector<int> rk(n + 1), ans(n + 1);
rk[1] = 1;
ans[1] = 1;
for (int i = 2; i <= n; i++) {
int l = 1, r = i;
// dbg(i);
while (l < r) {
int mid = l + r + 1 >> 1;
// dbg(mid, l, r);
// if (mid == 1) break;
if (mid == 1 || check(i, rk[mid - 1])) {
l = mid;
} else {
r = mid - 1;
}
}
for (int j = i; j > l; j--) {
ans[rk[j - 1]]++;
rk[j] = rk[j - 1];
}
rk[l] = i;
ans[i] = l;
// for (int i = 1; i <= n; i++) {
// cout << ans[i] << ' ';
// } cout << endl;
// for (int i = 1; i <= n; i++) {
// cout << rk[i] << ' ';
// } cout << endl;
// dbg(l);
int cnt = 0;
for (int j = i - 1; j >= 1; j--) {
if (ans[j] > ans[i]) cnt++;
if (f[j][i] == -1) {
f[j][i] = (f[j][i - 1] + cnt) % 2;
}
}
}
cout << "! ";
for (int i = 1; i <= n; i++) {
cout << ans[i] << ' ';
} cout << endl;
}
// 1 2 3
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int T = 1;
//cin >> T;
for (int t = 1; t <= T; ++t) {
Solve(t);
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3648kb
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: 68ms
memory: 18960kb
input:
1993 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 1 0 1 0 0 0 0 1 1 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1 1 1 0 1 1 1 1 1 0 1 1 0 0 1 0 0 0 1 0 0 0 0 1 1 0 0 1 0 1 1 0 1 1 1 1 0 1 1 1 1 1 0 1 1 0 0 0 0 0 0 0 1 0 0 0 1 0 0 1 1 0 0 1 1 1 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 1 0 0 0 1 0...
output:
? 1 2 ? 1 3 ? 2 3 ? 2 4 ? 3 4 ? 2 5 ? 3 5 ? 1 5 ? 2 6 ? 3 6 ? 5 6 ? 1 6 ? 1 7 ? 2 7 ? 5 7 ? 6 7 ? 1 8 ? 2 8 ? 3 8 ? 4 8 ? 5 8 ? 1 9 ? 2 9 ? 3 9 ? 4 9 ? 9 10 ? 5 10 ? 6 10 ? 7 10 ? 8 10 ? 1 11 ? 2 11 ? 3 11 ? 4 11 ? 9 11 ? 10 11 ? 11 12 ? 3 12 ? 4 12 ? 9 12 ? 10 12 ? 2 12 ? 11 13 ? 12 13 ? 4 13 ? 5 1...
result:
wrong answer Wa.