Submission #828933

#	Time	Username	Problem	Language	Result	Execution time	Memory
828933		CSQ31	Passport (JOI23_passport)	C++17	0 / 100	2117 ms	826396 KiB

passport

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define sz(a) (int)(a.size())
#define all(a) a.begin(),a.end()
#define lb lower_bound
#define ub upper_bound
#define owo ios_base::sync_with_stdio(0);cin.tie(0);
#define debug(...) fprintf(stderr, __VA_ARGS__),fflush(stderr)
#define time__(d) for(long blockTime = 0; (blockTime == 0 ? (blockTime=clock()) != 0 : false);\
debug("%s time : %.4fs\n", d, (double)(clock() - blockTime) / CLOCKS_PER_SEC))
typedef long long int ll;
typedef long double ld;
typedef pair<ll,ll> PII;
typedef pair<int,int> pii;
typedef vector<vector<int>> vii;
typedef vector<vector<ll>> VII;
ll gcd(ll a,ll b){if(!b)return a;else return gcd(b,a%b);}
const int MAXN = 2e5+5;
int a[MAXN],b[MAXN],c[MAXN];
int dist[4][MAXN];
vector<int>adj[MAXN];
int main()
{
	owo
	int n;
	cin>>n;
	queue<pii>q;
	for(int i=1;i<=n;i++)dist[0][i] = dist[1][i] = dist[2][i] = dist[3][i] = 1e9;
	for(int i=1;i<=n;i++){
		cin>>a[i]>>b[i];
		if(a[i]==1)c[i]++;
		if(b[i]==n)c[i]+=2;
		
		for(int j=a[i];j<=b[i];j++)adj[j].pb(i);
		if(c[i]){
			dist[c[i]][i] = 1;
			q.push({c[i],i});
		}
	}	
	while(!q.empty()){
		int x = q.front().se;
		int c0 = q.front().fi;
		q.pop();
		for(int i:adj[x]){
			int c1 = c[i] | c0;
			if(dist[c1][i] > dist[c0][x] + 1){
				dist[c1][i] = dist[c0][x] + 1;
				q.push({c1,i});
			} 
			
		}
		
	}
	int Q;
	cin>>Q;
	while(Q--){
		int i;
		cin>>i;
		if(dist[3][i]==1e9)cout<<-1<<'\n';
		else cout<<dist[3][i]<<'\n';
	}
	
	
}

• Subtask 1: 0 / 6
• Subtask 2: 0 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 8
• Subtask 5: 0 / 46