QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#297500 | #6303. Inversion | tangled | WA | 58ms | 19256kb | C++20 | 4.7kb | 2024-01-04 16:44:26 | 2024-01-04 16:44:27 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef double db;
const int N = 2010;
const ll mod = 998244353;
// const ll mod=1e9+7;
#define rep(i, a, n) for (int i = a; i <= n; i++)
#define per(i, a, n) for (int i = n; i >= a; i--)
#define vi vector<int>
#define all(x) (x).begin(), (x).end()
#define fi first
#define se second
#define sz(a) ((int)(a).size())
#define me(f, x) memset(f, x, sizeof(f))
#define uint unsigned int
#define ull unsigned long long
#define i128 __int128
#define pb emplace_back
#define pii pair<int, int>
#define debug(x) std::cout << x << endl
// #define endl '\n'
#define mt19937 rng(chrono::steady_clock::now().time_since_epoch().count())
ll powmod(ll a, ll b)
{
ll res = 1;
a %= mod;
assert(b >= 0);
for (; b; b >>= 1)
{
if (b & 1)
res = res * a % mod;
a = a * a % mod;
}
return res;
}
template <typename type>
inline void read(type &x)
{
x = 0;
bool flag(0);
char ch = getchar();
while (!isdigit(ch))
flag = ch == '-', ch = getchar();
while (isdigit(ch))
x = (x << 1) + (x << 3) + (ch ^ 48), ch = getchar();
flag ? x = -x : 0;
}
template <typename type>
inline void write(type x, bool mode = 1) // 0为空格,1为换行
{
x < 0 ? x = -x, putchar('-') : 0;
static short Stack[50], top(0);
do
Stack[++top] = x % 10, x /= 10;
while (x);
while (top)
putchar(Stack[top--] | 48);
mode ? putchar('\n') : putchar(' ');
}
// head~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// begin~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// end~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
int a[N], n, dis[N][N];
bool query(int l, int r)
{
int cnt = 0, x;
if (l > r)
{
swap(l, r);
}
if (r - l <= 1)
{
if (dis[l][r] == -1)
{
cout << "? " << l << " " << r << endl;
cout.flush();
cin >> x;
dis[l][r] = x;
}
else
{
x = dis[l][r] % 2;
}
return x % 2;
}
if (dis[l][r] == -1)
{
cout << "? " << l << " " << r << endl;
cout.flush();
cin >> x;
dis[l][r] = x;
cnt += dis[l][r] % 2;
}
else
{
cnt += dis[l][r] % 2;
}
if (dis[l + 1][r] == -1)
{
cout << "? " << l + 1 << " " << r << endl;
cout.flush();
cin >> x;
dis[l + 1][r] = x;
cnt -= dis[l + 1][r] % 2;
}
else
{
cnt -= dis[l + 1][r] % 2;
}
if (dis[l][r - 1] == -1)
{
cout << "? " << l << " " << r - 1 << endl;
cout.flush();
cin >> x;
dis[l][r - 1] = x;
cnt -= dis[l][r - 1] % 2;
}
else
{
cnt -= dis[l][r - 1] % 2;
}
if (dis[l + 1][r - 1] == -1)
{
cout << "? " << l + 1 << " " << r - 1 << endl;
cout.flush();
cin >> x;
dis[l + 1][r - 1] = x;
cnt += dis[l + 1][r - 1] % 2;
}
else
{
cnt += dis[l + 1][r - 1] % 2;
}
return (cnt % 2 + 2) % 2;
}
int ans[N];
void solve()
{
cin >> n;
// vector<int> q;
for (int i = 1; i <= n; i++)
{
a[i] = i;
}
for (int i = 1; i <= n; i++)
{
for (int j = 1; j <= n; j++)
{
if (i == j)
{
dis[i][j] = 0;
}
else
{
dis[i][j] = -1;
}
}
}
ans[1] = a[1];
for (int i = 2; i <= n; i++)
{
int l = 1, r = i - 1;
while (l < r)
{
int mid = (l + r) >> 1;
if (query(ans[mid], a[i]))
{
r = mid;
}
else
{
l = mid + 1;
}
}
if (!query(ans[i - 1], i))
{
ans[i] = i;
continue;
}
for (int j = i - 1; j >= l; j--)
{
ans[j + 1] = ans[j];
}
ans[l] = i;
int cnt = 0;
for (int j = i - 1; j >= l; j--)
{
if (ans[j] > ans[i])
cnt++;
dis[j][i] = dis[j][i - 1] + cnt;
}
}
cout << "! ";
for (int i = 1; i <= n; i++)
{
for (int j = 1; j <= n; j++)
{
if (ans[j] == i)
{
cout << j << " ";
}
}
}
cout << endl;
}
int main()
{
std::ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int _ = 1;
while (_--)
{
solve();
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3696kb
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: 58ms
memory: 19256kb
input:
1993 0 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 1 0 0 1 0 0 1 0 1 0 0 1 1 1 1 1 1 0 0 1 1 1 1 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 0 1 1 1 1 1 0 1 1 1 1 0 0 0 1 1 1 0 1 1 0 1 0 0 1 0 0 0 0 1 1 0 0 0 0 0 1 0 1 0 0 0 1 0 0 1 1 1 0 1 1 0 1 1 1 0 0 1 1 0 0 1 0 1 0 0 0 1 1 0 1 0 0 0 0 0 0 0 1 1...
output:
? 1 2 ? 1 3 ? 2 3 ? 2 4 ? 3 4 ? 2 5 ? 3 5 ? 1 5 ? 1 4 ? 4 5 ? 2 6 ? 3 6 ? 4 6 ? 5 6 ? 2 7 ? 3 7 ? 1 7 ? 1 6 ? 5 7 ? 6 7 ? 2 8 ? 3 8 ? 5 8 ? 6 8 ? 7 8 ? 1 9 ? 2 9 ? 1 8 ? 3 9 ? 4 9 ? 6 9 ? 7 9 ? 9 10 ? 5 10 ? 6 10 ? 8 10 ? 7 10 ? 9 11 ? 10 11 ? 5 11 ? 6 11 ? 1 11 ? 2 11 ? 1 10 ? 2 10 ? 2 12 ? 3 12 ? ...
result:
wrong output format Unexpected end of file - int32 expected