// High above the clouds there is a rainbow...
#include<bits/stdc++.h>
#include "park.h"
#define F first
#define S second
#define PB push_back
#define sz(s) int((s).size())
#define bit(n,k) (((n)>>(k))&1)
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const int maxn=1600;
vector<int> v[maxn], start ,vec ,vec2;
bool bad[maxn], mark[maxn], done[maxn];
int n, arr[maxn], Cnt;
/*
void Answer(int a,int b){
cout<<"Found "<<a<<" "<<b<<endl;
}
bool mark2[maxn];
vector<int>v2[maxn];
void dfs2(int u,int *arr){
mark2[u]=1;
for(int y:v2[u]){
if(mark2[y]==0 && arr[y])
dfs2(y,arr);
}
}
int Ask(int a,int b,int *arr){
assert( arr[a] && arr[b] );
memset(mark2,0,sizeof mark2);
dfs2(a,arr);
return mark2[b];
}
*/
void Dfs(int u){
mark[u]=1;
start.PB(u);
for(int y:v[u]){
if(mark[y]==0 && bad[y]==0)
Dfs(y);
}
}
int Bs(int u){
int l=-1,r=sz(start)-1;
while(r-l > 1){
int mid=(l+r)>>1;
for(int i=0;i<n;i++)
arr[i]=0;
for(int i=0;i<=mid;i++)
arr[ start[i] ]=1;
arr[u]=1;
if(Ask(u,start[0],arr)) r=mid;
else l=mid;
}
return start[r];
}
void Push(int u,int r){
memset(mark,0,sizeof mark);
start.clear(), Dfs(r);
for(int i=0;i<n;i++)
arr[i]=mark[i];
arr[u]=arr[r]=1;
if(Ask(u,r,arr)==0) return;
int w= Bs(u);
Answer(u,w), v[u].PB(w), v[w].PB(u), bad[w]=1;
memset(mark,0,sizeof mark);
vector<int>vec;
for(int y:v[w]){
if(mark[y]==0 && !bad[y]) vec.PB(y), Dfs(y);
}
for(int y:vec){
Push(u,y);
}
}
void Path(int u,int l=0,int r=sz(vec2)){
for(int i=l;i<r;i++){
arr[ vec2[i] ]=0;
}
if(Ask(0,u,arr)) return;
for(int i=l;i<r;i++){
arr[ vec2[i] ]=1;
}
if(r-l==1) { vec.PB(vec2[l]); return; }
int mid=(l+r)>>1;
Path(u,l,mid), Path(u,mid,r);
}
void Detect(int _,int n){
srand(time(0));
::n=n;
done[0]=1, Cnt=1;
while(Cnt<n){
int id=rand()%(n-Cnt);
for(int i=0;i<n;i++){
if(done[i]) continue;
if(id==0){ id=i; break; }
id--;
}
memset(arr,0,sizeof arr);
vec.clear(), vec2.clear();
for(int i=0;i<n;i++){
arr[i]=1;
if(i!=id && !done[i]) vec2.PB(i);
}
vec.PB(id), Path(id);
for(int i=0;i<n;i++){
arr[i]=0;
}
for(int x:vec){
arr[x]=1;
}
auto cmp=[&](int a,int b){
if(a==b) return false;
if(a==id) return false;
if(b==id) return true;
arr[a]=0;
bool ans= Ask(b,id,arr);
arr[a]=1;
return ans;
};
sort(vec.begin(), vec.end(), cmp);
for(int x:vec){
memset(bad,0,sizeof bad);
bad[x]=1;
Push(x,0);
done[x]=1;
Cnt++;
}
}
}
/*
int main(){
int n,m; cin>>n>>m;
while(m--){
int a,b; cin>>a>>b;
v2[a].PB(b), v2[b].PB(a);
}
Detect(-1,n);
return 0;
}
*/
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
2 ms |
384 KB |
Wrong Answer[4] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
5 ms |
512 KB |
Wrong Answer[4] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
3 ms |
512 KB |
Wrong Answer[4] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
3 ms |
432 KB |
Wrong Answer[4] |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
4 ms |
512 KB |
Wrong Answer[4] |
2 |
Halted |
0 ms |
0 KB |
- |