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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#778949 | #6303. Inversion | liuwei# | TL | 1ms | 3804kb | C++14 | 1.6kb | 2024-11-24 16:52:47 | 2024-11-24 16:52:48 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define rep(i, a, b) for(int i = a;i <= b;i++)
#define pre(i, a, b) for(int i = a;i >= b;i--)
#define pb push_back
const int N=2e3+5;
map<pair<int,int>,int>m;
int ask(int l,int r){
if(l>=r)return 0;
if(m.count({l,r}))return m[{l,r}];
printf("? %d %d\n",l,r);//<<" "<<l<<" "<<r<<endl;
fflush(stdout);
int x;
scanf("%d",&x);
m[{l,r}]=x;
fflush(stdout);
return x;
}
int get(int l,int r){//得到l和r的大小关系
int x=(ask(l,r)-ask(l+1,r)-ask(l,r-1)+ask(l+1,r-1)+4)%2;
// cout<<l<<" @@"<<r<<" "<<x<<endl;
return x;
}
int p[N];
void solve(int l,int r) {
if(l==r){
p[l]=l;
return;
}
int mid=(l+r)/2;
solve(1,mid);
solve(mid+1,r);
int x=mid,y=r;
vector<int>w;
//cout<<l<<" "<<r<<" "<<x<<" "<<y<<endl;
pre(i,r,l){
if(x>=l&&y>mid)
{
//cout<<x<<" "<<y<<"!"<<endl;
if(get(p[x],p[y])){
w.pb(p[x]);
//cout<<p[x]<<"!"<<p[y]<<" "<<x<<"!!"<<endl;
x--;
}
else
{
w.pb(p[y]);
//cout<<p[x]<<"!"<<p[y]<<" "<<x<<"!!"<<endl;
y--;
}
}
else if(x>=l){
w.pb(p[x]);
x--;
}
else{
w.pb(p[y]);
y--;
}
}
rep(i,0,w.size()-1){
p[r-i]=w[i];
}
//rep(i,l,r)cout<<p[i]<<" "<<l<<" "<<r<<endl;
}
int q[2005];
int main() {
int t = 1;
//cin>> t ;
while (t--) {
int n;
scanf("%d",&n);
solve(1,n);
printf("! ");fflush(stdout);
rep(i,1,n){
q[p[i]]=i;
//cout<<p[i]<<endl;
}
rep(i,1,n)printf("%d ",q[i]);
printf("\n");
fflush(stdout);
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3804kb
input:
3 0 1 0
output:
? 1 2 ? 2 3 ? 1 3 ! 2 3 1
result:
ok OK, guesses=3
Test #2:
score: -100
Time Limit Exceeded
input:
1993 0 0 0 0 1 0 1 0 0 0 0 0 0 0 1 0 0 1 0 1 0 0 0 1 0 0 0 1 1 1 1 0 1 1 1 1 1 0 0 1 1 0 1 0 1 1 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 1 0 0 0 0 0 1 1 0 1 0 0 1 0 0 0 0 1 1 1 1 1 0 1 1 1 1 0 1 0 1 0 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 0 0 0 1 1 1 1 1 1 0 1 1 1 1 0 1 1 0...
output:
? 1 2 ? 2 3 ? 3 4 ? 2 4 ? 4 5 ? 3 5 ? 2 5 ? 1 5 ? 1 4 ? 4 6 ? 5 6 ? 3 6 ? 2 6 ? 1 6 ? 4 7 ? 5 7 ? 3 7 ? 2 7 ? 1 7 ? 6 7 ? 4 8 ? 5 8 ? 3 8 ? 2 8 ? 1 3 ? 1 8 ? 4 9 ? 5 9 ? 3 9 ? 8 9 ? 2 9 ? 1 9 ? 4 10 ? 5 10 ? 3 10 ? 8 10 ? 9 10 ? 2 10 ? 1 10 ? 6 10 ? 7 10 ? 6 9 ? 7 9 ? 4 11 ? 5 11 ? 3 11 ? 8 11 ? 9 1...