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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#490119 | #8819. CNOI Knowledge | daishuchen2010 | TL | 0ms | 0kb | C++20 | 1.1kb | 2024-07-25 11:25:29 | 2024-07-25 11:25:29 |
answer
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1e3 + 5;
const unsigned long long p = 322771;
int ans[MAXN],ts,cnt[MAXN],add[MAXN];
map <unsigned long long,int> mp;//表示最后一个哈希为x的字串的结尾
inline int ask(int l,int r)
{
int res;
cout << "? " << l << ' ' << r << '\n';
cin >> res;
return res;
}
inline int getid(int l,int r)
{
int rr = r,mid;
while (l <= r)
{
mid = (l + r) / 2;
if (ask(mid,rr) - cnt[mid] == rr - mid + 1) r = mid - 1;
else l = mid + 1;
}
return r;
}
int main()
{
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n,id;
unsigned long long _h;
cin >> n;
cnt[1] = ans[1] = mp[1] = ts = 1;
for (int i = 2; i <= n; i++)
{
_h = 0;
id = getid(1,i);
if (!id) ans[i] = ++ts;
else ans[i] = ans[id];
for (int j = 1; j < i; j++) add[j] = 0;
for (int j = i; j >= 1; j--)
{
_h *= p,_h += ans[j];
add[mp[_h] + 1]++,add[j + 1]--;//差分
mp[_h] = j;
}
for (int j = 1; j <= i; j++) add[j] += add[j - 1],cnt[j] += add[j];
}
cout << "! ";
for (int i = 1; i <= n; i++) cout << ans[i] << ' ';
return 0;
}
Details
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Test #1:
score: 0
Time Limit Exceeded
input:
12