Submission #1122524

#	Time	Username	Problem	Language	Result	Execution time	Memory
1122524		Trisanu_Das	Airplane (NOI23_airplane)	C++20	10 / 100	1096 ms	17304 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second

int n, m;

signed main(){
    cin.tie(0)->sync_with_stdio(0);
    cin >> n >> m;
    int a[n];
    for(int i = 0; i < n; i++) cin >> a[i];
    vector<int> adj[n];
    for(int i = 0; i < m; i++){
        int u, v; cin >> u >> v;
        u--; v--;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    priority_queue<array<int, 3>, vector<array<int, 3> >, greater<array<int, 3> > > pq;
    pq.push({0, 0, 0});
    bool vis[2005][2005];
    memset(vis, 0, sizeof(vis));
    long long ans = 0;
    while(!pq.empty()){
        array<int, 3> cur = pq.top();
        pq.pop();
        if(cur[1] > 2000) continue;
        if(cur[1] == 0 && cur[2] == n - 1){
            ans = cur[0];
            break;
        }
        if(vis[cur[1]][cur[2]]) continue;
        vis[cur[1]][cur[2]] = 1;
        if(!vis[cur[1] + 1][cur[2]]) pq.push({cur[0] + 1, cur[1] + 1, cur[2]});
        if(cur[1] > a[cur[2]] && !vis[cur[1] - 1][cur[2]]) pq.push({cur[0] + 1, cur[1] - 1, cur[2]});
        for(int i : adj[cur[2]]){
            if(cur[1] - 1 >= a[i] && !vis[cur[1] - 1][i]) pq.push({cur[0] + 1, cur[1] - 1, i});
            if(cur[1] >= a[i] && !vis[cur[1]][i]) pq.push({cur[0] + 1, cur[1], i});
            if(cur[1] + 1 >= a[i] && !vis[cur[1] + 1][i]) pq.push({cur[0] + 1,cur[1] + 1, i});
        }
    }
    cout << ans << '\n';
}

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