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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#360526 | #6303. Inversion | Siilhouette | WA | 42ms | 19576kb | C++14 | 1.6kb | 2024-03-21 21:02:35 | 2024-03-21 21:02:36 |
Judging History
answer
#define _CRT_SECURE_NO_WARNINGS
#include<queue>
#include<cmath>
#include<string>
#include<cstring>
#include<iostream>
#include<algorithm>
using namespace std;
const int N=2010;
int n,tot,cnt,tim,v[N],ans[N][N],a[N],c[N];
//struct Node{int l,r;}a[N];
inline bool ask(int l,int r)
{
if(l==r)return 0;
int res;
printf("? %d %d\n",l,r);
cout.flush();
scanf("%d",&res);
return ans[l][r]=res;
}
inline bool query(int l,int r)
{
//cout<<"query "<<l<<" "<<r<<endl;
//cout<<"ans "<<ans[l][r]<<endl;
if(l==r)return 0;
if(l+1==r)return (~ans[l][r])?ans[l][r]:ask(l,r);
int x=(~ans[l][r])?ans[l][r]:ask(l,r);
int y=(~ans[l+1][r])?ans[l+1][r]:ask(l+1,r);
int z=(~ans[l][r-1])?ans[l][r-1]:ask(l,r-1);
int w=(~ans[l+1][r-1])?ans[l+1][r-1]:ask(l+1,r-1);
return x^y^z^w;
}
inline void insert(int x,int d)
{
for(int i=cnt;i>=d;i--)
a[i+1]=a[i];
a[d]=x;
cnt++;tim++;
for(int i=d+1;i<=cnt;i++)
v[a[i]]=tim;
for(int i=x-1,pos=0;i;i--)
{
if(v[i]==tim)pos++;
ans[i][x]=pos;
}
}
int main()
{
int pos;
memset(ans,-1,sizeof(ans));
scanf("%d",&n);
pos=ask(1,2);
insert(1,1);
insert(2,pos?1:2);
for(int i=3;i<=n;i++)
{
/**/
if(query(a[1],i)){
//cout<<"!"<<endl;
insert(i,1);continue; }
if(!query(a[cnt],i)){
//cout<<"#"<<endl;
insert(i,cnt+1);continue; }
int l=1,r=cnt;
while(l<r)
{
int mid=l+r>>1;
if(query(a[mid],i))r=mid;
else l=mid+1;
}
//if(l==cnt)insert(i,query(a[cnt],i)?cnt:cnt+1);
insert(i,l);
}
for(int i=1;i<=n;i++)
c[a[i]]=i;
putchar('!');
for(int i=1;i<=n;i++)
printf(" %d",c[i]);
putchar('\n');
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 19536kb
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: 42ms
memory: 19576kb
input:
1993 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 1 1 1 1 0 1 1 1 1 0 0 1 1 1 1 1 0 0 1 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 0 0 0 0 1 0 0 0 0 1 1 1 1 1 1 1 1 1 0 0 0 1 0 0 0 1 1 0 0 1 0 1 0 1 0 0 1 0 1 1 0 0 1 1 1 0 0 1 1 1 0 0 0 1 0 1 0 0 0 1 0 0 0 0 1 0 0...
output:
? 1 2 ? 1 3 ? 2 3 ? 1 4 ? 2 4 ? 3 4 ? 1 5 ? 2 5 ? 5 6 ? 4 6 ? 2 6 ? 3 6 ? 1 6 ? 5 7 ? 6 7 ? 7 8 ? 4 8 ? 5 8 ? 1 8 ? 2 8 ? 6 8 ? 7 9 ? 8 9 ? 4 9 ? 5 9 ? 7 10 ? 8 10 ? 9 10 ? 1 10 ? 2 10 ? 3 10 ? 4 10 ? 5 10 ? 7 11 ? 8 11 ? 9 11 ? 10 11 ? 1 11 ? 2 11 ? 4 11 ? 5 11 ? 3 11 ? 7 12 ? 8 12 ? 9 12 ? 10 12 ?...
result:
wrong answer Wa.