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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#779026 | #6303. Inversion | liuwei# | TL | 1ms | 3488kb | C++14 | 1.7kb | 2024-11-24 17:08:07 | 2024-11-24 17:08:07 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define rep(i, a, b) for(int i = a;i <= b;i++)
#define pre(i, a, b) for(int i = a;i >= b;i--)
#define pb push_back
const int N = 2e3 + 5;
int cnt = 0;
map<pair<int, int>, int>m;
int ask(int l, int r) {
if (l >= r)return 0;
if (m.count({ l,r }))return m[{l, r}];
cnt++;
if(cnt>=39000)return 0;
cout << "? " << l << " " << r << "\n";
cout.flush();
int x;
cin >> x;
// cout << "\n";
m[{l, r}] = x;
return x;
}
int get(int l, int r) {//得到l和r的大小关系
int x = (ask(l, r) - ask(l + 1, r) - ask(l, r - 1) + ask(l + 1, r - 1) + 4) % 2;
return x;
}
int p[N];
void solve(int l, int r) {
if (l == r) {
p[l] = l;
return;
}
int mid = (l + r) / 2;
solve(1, mid);
solve(mid + 1, r);
int x = mid, y = r;
vector<int>w;
pre(i, r, l) {
if (x >= l && y > mid)
{
if (get(p[x], p[y])) {
w.pb(p[x]);
x--;
}
else
{
w.pb(p[y]);
y--;
}
}
else if (x >= l) {
w.pb(p[x]);
x--;
}
else {
w.pb(p[y]);
y--;
}
}
rep(i, 0, w.size() - 1) {
p[r - i] = w[i];
}
}
int q[2005];
int main() {
int t = 1;
//cin>> t ;
while (t--) {
int n;
cin >> n;
solve(1, n);
cout << "! ";
rep(i, 1, n) {
q[p[i]] = i;
}
rep(i, 1, n)cout << q[i] << " ";
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3488kb
input:
3 0 1 0
output:
? 1 2 ? 2 3 ? 1 3 ! 2 3 1
result:
ok OK, guesses=3
Test #2:
score: -100
Time Limit Exceeded
input:
1993 0 0 0 0 1 0 1 0 0 0 0 0 0 0 1 0 0 1 0 1 0 0 0 1 0 0 0 1 1 1 1 0 1 1 1 1 1 0 0 1 1 0 1 0 1 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 1 0 0 0 0 0 1 1 0 1 0 0 1 0 0 0 0 1 1 1 1 1 0 1 1 1 1 0 1 0 1 0 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 0 0 0 1 1 1 1 1 1 0 1 1 1 1 0 1 1 0...
output:
? 1 2 ? 2 3 ? 3 4 ? 2 4 ? 4 5 ? 3 5 ? 2 5 ? 1 5 ? 1 4 ? 4 6 ? 5 6 ? 3 6 ? 2 6 ? 1 6 ? 4 7 ? 5 7 ? 3 7 ? 2 7 ? 1 7 ? 6 7 ? 4 8 ? 5 8 ? 3 8 ? 2 8 ? 1 3 ? 1 8 ? 4 9 ? 5 9 ? 3 9 ? 8 9 ? 2 9 ? 1 9 ? 4 10 ? 5 10 ? 3 10 ? 8 10 ? 9 10 ? 2 10 ? 1 10 ? 6 10 ? 7 10 ? 6 9 ? 7 9 ? 4 11 ? 5 11 ? 3 11 ? 8 11 ? 9 1...