제출 #886211

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
886211		vjudge1	Airplane (NOI23_airplane)	C++11	100 / 100	477 ms	22592 KiB

Main

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

int main(){
	int n, m;
	cin >> n >> m;
	vector<int> a(n);
	for(int i = 0; i < n; i++){
		cin >> a[i];
	}

	vector<vector<int>> G(n);

	for(int i = 0; i < m; i++){
		int a, b;
		cin >> a >> b;
		--a, --b;
		G[a].pb(b);
		G[b].pb(a);
	}

	// time, minalt, v
	priority_queue<array<int, 3>, vector<array<int, 3>>, greater<array<int, 3>>> q;
	vector<int> tstart(n), salt(n);
	q.push({0, 0, 0});

	vector<bool> vis(n);
	vis[0] = 1;

	int ans = INT_MAX;

	while(!q.empty()){
		auto [time, minalt, u] = q.top(); q.pop();
		tstart[u] = time;
		salt[u] = minalt;
		for(int v : G[u]){
			if(vis[v]) continue;
			vis[v] = 1;
			if(time < a[v] - 1){
				q.push({a[v], a[v], v}); // kesinlikle v icin minimum sure 
			} else{
				q.push({time+1, max(max(minalt-1, a[v]), 0), v});
			}
		}
	}

	q.push({0, 0, n-1});
	vis.assign(n, 0);
	vector<int> tend(n), ealt(n);


	function<int(int)> altdif = [&](int u){
		int ret = min(abs(tstart[u] - ealt[u]), abs(tend[u] - salt[u]));
		if(salt[u] <= ealt[u] && ealt[u] <= tstart[u]) ret = 0;
		if(salt[u] <= tend[u] && tend[u] <= tstart[u]) ret = 0;
		if(ealt[u] <= salt[u] && salt[u] <= tend[u]) ret = 0;
		if(ealt[u] <= tstart[u] && tstart[u] <= tend[u]) ret = 0;
		return ret;
	};

	
	while(!q.empty()){
		auto [time, minalt, u] = q.top(); q.pop();
		tend[u] = time;
		ealt[u] = minalt;
		ans = min(ans, tend[u] + tstart[u] + altdif(u));
		for(int v : G[u]){
			if(vis[v]) continue;
			vis[v] = 1;
			if(time < a[v] - 1){
				q.push({a[v], a[v], v}); // kesinlikle v icin minimum sure 
			} else{
				q.push({time+1, max(max(minalt-1, a[v]), 0), v});
			}
		}
	}

	cout << ans << endl;
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int main()':
Main.cpp:34:8: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   34 |   auto [time, minalt, u] = q.top(); q.pop();
      |        ^
Main.cpp:64:8: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   64 |   auto [time, minalt, u] = q.top(); q.pop();
      |        ^

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