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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#244756 | #6303. Inversion | hhoppitree# | WA | 70ms | 19592kb | C++14 | 1.7kb | 2023-11-09 15:24:18 | 2023-11-09 15:24:19 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
const int N=2010;
int via[N][N];
__inline int ask(int l,int r)
{
if(l==r)return 0;
if(l>r) return 0;
if(via[l][r]!=-1)return via[l][r];
printf("? %d %d\n",l,r);fflush(stdout);
scanf("%d",&via[l][r]);return via[l][r];
}
__inline int cmp(int x,int y)
//ask if p_i>p_j
{
int op=0;if(x>y)swap(x,y),op=1;
return (ask(x,y)+ask(x+1,y-1)-ask(x,y-1)-ask(x+1,y)+10+op)%2;
}
int p[N],ip[N];
int main()
{
int n;
memset(via,-1,sizeof via);
scanf("%d",&n);
p[1]=1;
for(int i=2;i<=n;++i)
{
// cerr<<"SOLVED : ";
// for(int j=1;j<i;++j)cerr<<p[j]<<"_";cerr<<endl;
for(int j=1;j<i;++j)ip[p[j]]=j;
int u=(ask(1,i)-ask(1,i-1)+2)%2;
vector<int>mb;
// cerr<<"DELTA="<<u<<endl;
for(int j=1;j<i;++j)if((i-j&1)==u)mb.push_back(ip[j]);
//mb: greater than j
int l=0,r=(int)mb.size()-1,ans=mb.size();
// for(int i:mb)cerr<<i<<",";cerr<<endl;
while(l<=r)
{
int mid=l+r>>1;
// cerr<<"TRY : "<<mb[mid]<<endl;
if(cmp(mb[mid],i))//p_{mb_mid}>p_i
{
// cerr<<"SUC,LESS\n";
ans=mid,r=mid-1;
}
else
// cerr<<"FAI,GREATER\n",
l=mid+1;
}
// cerr<<"ENDIN : "<<ans<<endl;
if(ans==mb.size())
{
p[i]=i;
}
else
{
int pos=mb[ans],w=p[pos];
// cerr<<"END IN : "<<pos<<endl;
for(int j=1;j<i;++j)if(p[j]>=w)++p[j];
p[i]=w;
}
}
printf("!");
for(int i=1;i<=n;++i)printf(" %d",p[i]);puts("");
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 19592kb
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: 19576kb
input:
1993 0 0 0 0 0 0 0 1 0 0 0 1 0 0 1 0 1 0 1 0 0 0 0 0 1 1 1 1 0 0 1 1 1 1 0 1 0 1 1 1 0 1 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 1 1 0 0 0 1 0 0 1 0 1 1 1 0 0 1 0 0 0 1 0 1 1 0 0 0 1 0 0 1 0 0 0 0 0 1 1 1 0 0 1 1 0 0 1 0 1 1 0 1 0 0 0 1 1 1 0 1 0 1 1 0 1 1 1 0 1 0 0 0 1 1 0 1 0 0 0 0 0 1 1 0 0 0 0 1 0 1 0 0...
output:
? 1 2 ? 1 3 ? 2 3 ? 1 4 ? 2 4 ? 3 4 ? 1 5 ? 2 5 ? 1 6 ? 2 6 ? 1 7 ? 2 7 ? 5 7 ? 5 6 ? 6 7 ? 1 8 ? 2 8 ? 3 8 ? 4 7 ? 3 7 ? 4 8 ? 1 9 ? 6 9 ? 7 8 ? 6 8 ? 7 9 ? 2 9 ? 3 9 ? 1 10 ? 2 10 ? 5 10 ? 5 9 ? 6 10 ? 1 11 ? 9 11 ? 9 10 ? 10 11 ? 6 11 ? 7 10 ? 7 11 ? 1 12 ? 2 11 ? 2 12 ? 8 12 ? 8 11 ? 9 12 ? 10 1...
result:
wrong output format Unexpected end of file - int32 expected