Submission #594545

#	Time	Username	Problem	Language	Result	Execution time	Memory
594545		Koosha_mv	Park (JOI17_park)	C++14	10 / 100	138 ms	812 KiB

park

#include "park.h"
#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,v.size()) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<x.F<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first

const int N=1505;

mt19937 rng(time(nullptr));

int n,place[N];
vector<int> g[N];

void reset(){
	f(i,0,n) place[i]=0;
}
int rand(int l,int r){
	uniform_int_distribution<int> rnd(l,r-1);
	return rnd(rng);
}
int ask(int s,int t){
	if(s>t) swap(s,t);
	int res=Ask(s,t,place);
	return res;
}
void path(int s,int t,vector<int> vec){
	if(vec.size()==0){
		if(s>t) swap(s,t);
		Answer(s,t);
		g[s].pb(t);
		g[t].pb(s);
		return ;
	}
	int id=vec[rand(0,vec.size())];
	reset();
	place[s]=place[t]=1;
	for(auto x : vec){
		place[x]=1;
	}
	vector<int> L,R;
	for(auto x : vec){
		if(x==id) continue ;
		place[x]=0;
		if(ask(s,id)==0) L.pb(x);
		else R.pb(x);
		place[x]=1;
	}
	path(s,id,L);
	path(id,t,R);
}
void Detect(int T, int _n) {
	n=_n;
	vector<int> vec(n-2);
	iota(all(vec),1);
	path(0,n-1,vec);
}

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 27
• Subtask 4: 0 / 30
• Subtask 5: 0 / 23