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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#662067 | #6303. Inversion | libantian | WA | 57ms | 4100kb | C++23 | 3.4kb | 2024-10-20 20:29:50 | 2024-10-20 20:30:18 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define INF 0x3f3f3f3f3f3f3f3f
#define pii pair<int,int>
#define fi first
#define se second
#define all(_a) _a.begin(), _a.end()
const int N=20010;
int a[N],tr[N];
int n;
map<pii,int>mp;
int query(int l,int r){
cout<<"? "<<l<<" "<<r<<endl;
cout.flush();
int x;
cin>>x;
return x;
//return x&1;
}
int lowbit(int x){
return x&-x;
}
void init(int len){
for(int i=1;i<=len;i++)tr[i]=0;
}
void add(int u,int len){
for(int i=u;i<=len;i+=lowbit(i))tr[i]++;
}
int get(int u){
int res=0;
for(int i=u;i;i-=lowbit(i))res+=tr[i];
return res;
}
int get(int l,int r,int L,int R){
int len=R-L+1;
init(len);
int res=0;
for(int i=l;i<=r;i++){
res+=get(len-a[i]+1);
add(a[i],len);
}
//cout<<"->"<<l<<" "<<r<<" "<<res<<endl;
return res&1;
}
void build(int l,int r){
// cout<<l<<" "<<r<<endl;
if(l==r){
a[l]=1;
return ;
}
int mid=(l+r)/2;
build(l,mid);
build(mid+1,r);
vector<int> stk,res;
stk.push_back(n+1);
map<int,int>pos,stt;
for(int i=mid;i>=l;i--){
while(a[i]<a[stk.back()])stk.pop_back();
pos[i]=stk.back();
stk.push_back(i);
}
//cout<<pos[1]<<" "<<pos[2]<<endl;
priority_queue<pii>ql,qr;
for(int i=l;i<=mid;i++){
ql.push({a[i],i});
}
for(int i=mid+1;i<=r;i++){
qr.push({a[i],i});
}
while(qr.size()){
if(ql.size()==0){
res.push_back(qr.top().se);
qr.pop();
continue;
}
int st=ql.top().se;
int ed=pos[st];
int now=qr.top().se;
if(ed==n+1){
ed=mid;
int t;
if(mp.find({st,ed})==mp.end()){
mp[{st,ed}]=get(st,ed,l,mid);
}
t=mp[{st,ed}];
if((query(st,now)^t)==query(mid+1,now)){
res.push_back(st);
ql.pop();
}else{
res.push_back(now);
qr.pop();
}
}else{
int t;
if(mp.find({st,ed-1})==mp.end()){
mp[{st,ed-1}]=get(st,ed-1,l,mid);
}
//cout<<st<<" "<<ed-1<<" "<<now<<endl;
t=mp[{st,ed-1}];
if((query(st,now)^t)==query(ed,now)){
res.push_back(st);
ql.pop();
}else{
//cout<<66<<endl;
res.push_back(now);
qr.pop();
}
}
}
while(ql.size()){
res.push_back(ql.top().se);
ql.pop();
}
for(int i=0;i<res.size();i++){
a[res[i]]=res.size()-i;
}
}
void solve(){
cin>>n;
a[n+1]=-INF;
build(1,n);
// build(1,1);
// build(2,2);
// build(1,2);
// build(3,3);
// cout<<"======="<<endl;
// build(1,3);
// for(int i=1;i<=n;i++){
// cout<<a[i]<<" ";
// }
// cout<<endl;
cout<<"! ";
for(int i=1;i<n;i++){
cout<<n-a[i]+1<<" ";
}
cout<<n-a[n]+1;
}
signed main(){
fflush(stdout);
cout.flush();
ios::sync_with_stdio(false);
cin.tie(nullptr), cout.tie(nullptr);
int T;
T=1;
// cin>>T;
while(T--)solve();
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 3488kb
input:
3 0 0 0 1
output:
? 1 2 ? 2 2 ? 1 3 ? 2 3 ! 2 3 1
result:
ok OK, guesses=4
Test #2:
score: -100
Wrong Answer
time: 57ms
memory: 4100kb
input:
1993 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 1 1 1 0 1 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 1 0 1 1 1 1 1 1 0 0 1 1 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 1 0 0 1 0 1 1 1 1 0 1 1 1 0 0 0 0 0 0 1 0 0 0 0 1 0 1 0 1 1 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0...
output:
? 1 2 ? 2 2 ? 3 4 ? 4 4 ? 1 3 ? 2 3 ? 2 3 ? 3 3 ? 5 6 ? 6 6 ? 7 8 ? 8 8 ? 5 7 ? 6 7 ? 5 8 ? 6 8 ? 1 7 ? 2 7 ? 1 8 ? 2 8 ? 1 5 ? 2 5 ? 1 6 ? 2 6 ? 2 6 ? 3 6 ? 3 6 ? 4 6 ? 4 6 ? 5 6 ? 9 10 ? 10 10 ? 11 12 ? 12 12 ? 10 11 ? 11 11 ? 9 11 ? 11 11 ? 9 12 ? 11 12 ? 13 14 ? 14 14 ? 15 16 ? 16 16 ? 14 15 ? 1...
result:
wrong answer Wa.