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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#279804 | #6303. Inversion | forget-star# | WA | 70ms | 19344kb | C++14 | 1.0kb | 2023-12-09 09:43:46 | 2023-12-09 09:43:47 |
Judging History
answer
#include<iostream>
#include<cstring>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<ctime>
#include<vector>
using namespace std;
typedef long long ll;
const int N=2005;
int a[N],b[N],f[N][N],n;
int query(int x,int y)
{
if(x>=y) return 0;
if(f[x][y]!=-1) return f[x][y];
cout<<"? "<<x<<" "<<y<<'\n';
fflush(stdout);
int tmp;cin>>tmp;
return f[x][y]=tmp;
}
int check(int x,int y)
{
return query(x,y)^query(x+1,y)^query(x,y-1)^query(x+1,y-1);
}
int main()
{
cin>>n;memset(f,-1,sizeof(f));
for(int i=1;i<=n;i++) f[i][i]=0;
for(int i=1;i<=n;i++) a[i]=i;
for(int i=2;i<=n;i++)
{
int l=1,r=i-1,res=i;
while(l<=r)
{
int mid=(l+r)>>1;
if(check(a[mid],i)) res=mid,r=mid-1;
else l=mid+1;
}
for(int j=i;j>res;j--) a[j]=a[j-1];
a[res]=i;
for(int j=1;j<=i;j++) b[a[j]]=j;
for(int j=i-1;j>=1;j--) res^=(b[j]>b[i]),f[j][i]=res^f[j][i-1];
}
cout<<"! ";
for(int i=1;i<=n;i++) b[a[i]]=i;
for(int i=1;i<=n;i++) cout<<b[i]<<" ";
fflush(stdout);
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 19344kb
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: 70ms
memory: 19340kb
input:
1993 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 0 0 1 0 1 0 1 1 1 1 1 1 1 1 1 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 1 1 1 1 1 0 0 0 0 0 0 0 1 0 0 0 1 1 0 0 1 0 0 0 0 1 0 1 0 1 0 1 1 1 1 1 1 0 1 0 0 0 0 1 1 1 0 0 0 0 1 0 1 1 0 1 0 1 1 0 0 0 1 1 1 1 0 0 0 0 0 1 1 1 0 0 1 0 1 0 0 0 0 0 1 1 0 0 0 1 0 0 0 1 1 0 1 0 1...
output:
? 1 2 ? 1 3 ? 2 3 ? 1 4 ? 2 4 ? 3 4 ? 4 5 ? 3 5 ? 4 6 ? 5 6 ? 1 6 ? 2 6 ? 4 7 ? 5 7 ? 6 7 ? 4 8 ? 5 8 ? 6 8 ? 7 8 ? 3 9 ? 4 9 ? 8 9 ? 7 9 ? 3 10 ? 4 10 ? 7 10 ? 8 10 ? 9 10 ? 5 11 ? 6 11 ? 9 11 ? 10 11 ? 7 11 ? 8 11 ? 5 12 ? 6 12 ? 11 12 ? 7 12 ? 8 12 ? 8 13 ? 9 13 ? 11 13 ? 12 13 ? 10 13 ? 8 14 ? 9...
result:
wrong answer Wa.