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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#778993 | #6303. Inversion | liuwei# | TL | 0ms | 0kb | C++14 | 1.6kb | 2024-11-24 17:01:26 | 2024-11-24 17:01:26 |
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;
int cnt=0;
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}];
cnt++;
printf("? %d %d\n",l,r);//<<" "<<l<<" "<<r<<endl;
int x;
scanf("%d",&x);
m[{l,r}]=x;
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("! ");
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: 0
Time Limit Exceeded
input:
3