Submission #929259

#	Time	Username	Problem	Language	Result	Execution time	Memory
929259		dubabuba	Airplane (NOI23_airplane)	C++14	0 / 100	131 ms	38984 KiB

Main

#include <bits/stdc++.h>
using namespace std;

typedef pair<int, int> pii;
#define ff first
#define ss second
#define MP make_pair

const int mxn = 1e6 + 10;
int dis[mxn], a[mxn], n, m;
vector<int> adj[mxn];

int main() {
	cin >> n >> m;
	for(int i = 1; i <= n; i++)
		cin >> a[i];
	for(int i = 0; i < m; i++) {
		int u, v;
		cin >> u >> v;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}

	memset(dis, -1, sizeof dis);
	priority_queue<pii> pq;
	pq.push(MP(0, 1));

	while(pq.size()) {
		int d = -pq.top().ff;
		int u = pq.top().ss;
		pq.pop();

		if(dis[u] > -1) continue;
		dis[u] = d;

		for(int v : adj[u])
			if(dis[v] == -1)
				pq.push(MP(-max(d, a[v]), v));
	}

	cout << dis[n] * 2 << endl;
	return 0;
}

• Subtask 1: 0 / 22
• Subtask 2: 0 / 10
• Subtask 3: 0 / 31
• Subtask 4: 0 / 37