Submission #577373

#	Time	Username	Problem	Language	Result	Execution time	Memory
577373		handlename	Game (APIO22_game)	C++17	12 / 100	9 ms	14424 KiB

game

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
const int MOD=1e9+7;
int n,k;
vector<int> adj[300001],rev[300001];
int l[300001],r[300001];
//leftmost special guy node i can reach
//rightmost special guy who can reach node i
//cycle iff exists l[i]<=r[i]
void init(int N,int K){
	n=N;
	k=K;
	for (int i=1;i<=k;i++){
		if (i<k){
			adj[i].pb(i+1);
			rev[i+1].pb(i);
		}
		l[i]=i;
		r[i]=i;
	}
	for (int i=k+1;i<=n;i++){
		l[i]=n+1;
		r[i]=0;
	}
}
bool vis[300001];
void dfs0(int x,int val){
	if (vis[x]) return;
	vis[x]=true;
	l[x]=min(l[x],val);
	for (auto i:rev[x]) dfs0(i,val);
}
void dfs1(int x,int val){
	if (vis[x]) return;
	vis[x]=true;
	r[x]=max(r[x],val);
	for (auto i:adj[x]) dfs1(i,val);
}
int add_teleporter(int u,int v){
	u++;
	v++;
	adj[u].pb(v);
	rev[v].pb(u);
	if (u==v) return 1;
	if (l[u]>=l[v]){
		for (int i=1;i<=n;i++) vis[i]=false;
		dfs0(u,l[v]);
		for (int i=1;i<=k;i++){
			if (l[i]<r[i]) return 1;
		}
		for (int i=k+1;i<=n;i++){
			if (l[i]<=r[i]) return 1;
		}
	}
	if (r[u]>=r[v]){
		for (int i=1;i<=n;i++) vis[i]=false;
		dfs1(v,r[u]);
		for (int i=1;i<=k;i++){
			if (l[i]<r[i]) return 1;
		}
		for (int i=k+1;i<=n;i++){
			if (l[i]<=r[i]) return 1;
		}
	}
	return 0;
}

• Subtask 1: 2 / 2
• Subtask 2: 10 / 10
• Subtask 3: 0 / 18
• Subtask 4: 0 / 30
• Subtask 5: 0 / 40