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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#138320 | #6303. Inversion | yzhang | WA | 59ms | 19348kb | C++14 | 1.7kb | 2023-08-11 14:22:22 | 2023-08-11 14:22:24 |
Judging History
answer
//μ's forever
#include <bits/stdc++.h>
#define N 2005
//#define getchar nc
using namespace std;
inline char nc(){
static char buf[100000],*p1=buf,*p2=buf;
return p1==p2&&(p2=(p1=buf)+fread(buf,1,100000,stdin),p1==p2)?EOF:*p1++;
}
inline int read()
{
register int x=0,f=1;register char ch=getchar();
while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
while(ch>='0'&&ch<='9')x=(x<<3)+(x<<1)+ch-'0',ch=getchar();
return x*f;
}
inline void write(register int x)
{
if(!x)putchar('0');if(x<0)x=-x,putchar('-');
static int sta[20];register int tot=0;
while(x)sta[tot++]=x%10,x/=10;
while(tot)putchar(sta[--tot]+48);
}
int n;
int p[N],ip[N],f[N][N];
int qry(int l,int r){
if(l>=r) return 0;
if(f[l][r]!=-1) return f[l][r];
printf("? %d %d\n",l,r);
fflush(stdout);
int x=read();
f[l][r]=x;
return x;
}
int chk(int l,int r){
return ((qry(l,r)-qry(l,r-1)-qry(l+1,r)+qry(l+1,r-1))%2+2)%2;
}
void solve(int pos){
int l=1,r=pos-1,res=pos;
while(l<=r){
int mid=l+r>>1;
if(chk(ip[mid],pos)){
res=mid,r=mid-1;
}else{
l=mid+1;
}
}
p[pos]=res;
for(int i=1;i<pos;++i) if(p[i]>=res) ++p[i];
for(int i=1;i<=pos;++i) ip[p[i]]=i;
f[pos][pos]=0;
for(int i=pos-1;i>=1;--i){
f[i][pos]=f[i+1][pos]+f[i][pos-1]-f[i+1][pos-1]+(p[i]>p[pos]);
}
}
int main()
{
memset(f,-1,sizeof(f));
n=read();
for(int i=1;i<=n;++i) f[i+1][i]=0;
p[1]=1,ip[1]=1;
for(int i=2;i<=n;++i){
solve(i);
}
putchar('!');
for(int i=1;i<=n;++i) printf(" %d",p[i]);
fflush(stdout);
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 19300kb
input:
3 0 0 0 1
output:
? 1 2 ? 1 3 ? 1 2 ? 2 3 ! 2 3 1
result:
ok OK, guesses=4
Test #2:
score: 0
Accepted
time: 59ms
memory: 19292kb
input:
1993 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 1 0 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1 1 1 0 1 1 1 1 1 0 0 0 1 0 1 0 1 0 0 0 0 1 1 0 0 1 0 0 1 1 1 1 1 0 1 1 1 1 1 1 0 0 0 0 0 0 1 0 1 1 1 0 0 1 0 1 1 0 1 1 0 1 1 0 0 1 0 0 0 1 1 0 1 1 0 0 0 1 0 1 0 0 1 1 0 0 1 0 0 1 1 1 1 1 1 0 0...
output:
? 1 2 ? 1 3 ? 1 2 ? 2 3 ? 2 4 ? 3 4 ? 2 5 ? 3 5 ? 1 5 ? 2 6 ? 3 6 ? 5 6 ? 1 6 ? 1 7 ? 2 7 ? 5 7 ? 6 7 ? 1 8 ? 2 8 ? 3 8 ? 4 8 ? 1 9 ? 2 9 ? 8 9 ? 3 9 ? 9 10 ? 5 10 ? 6 10 ? 7 10 ? 8 10 ? 1 11 ? 2 11 ? 8 11 ? 9 11 ? 10 11 ? 11 12 ? 8 12 ? 9 12 ? 10 12 ? 2 12 ? 3 12 ? 11 13 ? 12 13 ? 3 13 ? 4 13 ? 5 1...
result:
ok OK, guesses=37851
Test #3:
score: -100
Wrong Answer
time: 55ms
memory: 19348kb
input:
1887 1 0 0 0 0 0 1 1 1 1 0 0 0 1 1 1 0 0 1 0 0 0 0 1 1 0 1 1 1 0 0 1 0 0 0 0 1 0 1 0 0 1 0 1 1 1 1 1 1 1 1 0 1 1 1 1 1 0 1 1 1 1 1 0 0 0 0 1 0 1 1 0 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 1 1 1 1 0 0 0 1 0 1 0 1 1 0 0 0 1 0 1 0 1 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 0 1 1 1 0 1 1 1 1 0 0 0 1 0 0 1 1 0 1 1 1 0 0 0...
output:
? 1 2 ? 2 3 ? 1 3 ? 1 4 ? 2 4 ? 3 4 ? 1 5 ? 2 5 ? 3 5 ? 4 5 ? 3 6 ? 4 6 ? 5 6 ? 3 7 ? 4 7 ? 6 7 ? 5 7 ? 7 8 ? 6 8 ? 4 8 ? 5 8 ? 7 9 ? 8 9 ? 6 9 ? 4 9 ? 5 9 ? 5 10 ? 6 10 ? 1 10 ? 2 10 ? 3 10 ? 7 11 ? 8 11 ? 9 11 ? 5 11 ? 6 11 ? 5 12 ? 6 12 ? 1 12 ? 2 12 ? 3 12 ? 4 12 ? 7 12 ? 8 12 ? 12 13 ? 1 13 ? 2...
result:
wrong answer Wa.