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Submission #886971

# Submission time Handle Problem Language Result Execution time Memory
886971 2023-12-13T10:03:41 Z efedmrlr Airplane (NOI23_airplane) C++17
100 / 100
 265 ms 24228 KB 
#include <bits/stdc++.h>

#define lli long long int
#define MP make_pair
#define REP(i,n) for(int i = 0; (i)<(n); (i)++)
#define pb push_back

const int N = 2e5+5;
const int M = 4e3+5;
const int MOD = 1e9+7;
const int INF = 1e9 + 500;
using namespace std;

void fastio() {
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
}
int n,m,q;
vector<int> a(N, 0);
vector<vector<int> > adj(N, vector<int>());
vector<int> dp1, dp2;
void bfs(int src, vector<int> &sp) {
    priority_queue<array<int,2>, vector<array<int,2> >, greater<array<int,2> > > que;
    sp.assign(n + 3, INF);
    sp[src] = 0;
    que.push({0, src});
    while(que.size()) {
        auto cur = que.top();
        que.pop();
        for(auto c : adj[cur[1]]) {
            if(sp[c] != INF) continue;

            sp[c] = max(cur[0] + 1 , a[c]);
            que.push({sp[c], c});
        }
    } 

}


void solve() {
    cin>>n>>m;
    REP(i,n) cin>>a[i + 1];
    for(int i = 1; i<=m; i++) {
        int u,v;
        cin>>u>>v;
        adj[u].pb(v);
        adj[v].pb(u);
    }
    int ans = INF;
    bfs(1, dp1);
    bfs(n, dp2);
    for(int i = 1; i<=n; i++) {
        int ret = max(dp1[i] , dp2[i]) * 2;
        ans = min(ans , ret);
    }
    for(int i = 1; i<=n; i++) {
        for(auto c : adj[i]) {
            if(dp1[i] == dp2[c]) ans = min(ans, dp1[i] * 2 + 1);  
        }
    }
    cout<<ans<<"\n";
}

signed main() {
    fastio();
    solve();
}

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5720 KB Output is correct
2 Correct 57 ms 16940 KB Output is correct
3 Correct 58 ms 17236 KB Output is correct
4 Correct 59 ms 17436 KB Output is correct
5 Correct 62 ms 17888 KB Output is correct
6 Correct 61 ms 17840 KB Output is correct
7 Correct 61 ms 18000 KB Output is correct
8 Correct 2 ms 5720 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5724 KB Output is correct
2 Correct 3 ms 5920 KB Output is correct
3 Correct 2 ms 5724 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Correct 2 ms 5724 KB Output is correct
6 Correct 3 ms 5980 KB Output is correct
7 Correct 3 ms 5964 KB Output is correct
8 Correct 3 ms 6060 KB Output is correct
9 Correct 3 ms 6044 KB Output is correct
10 Correct 3 ms 5980 KB Output is correct
11 Correct 3 ms 5980 KB Output is correct
12 Correct 3 ms 5980 KB Output is correct
13 Correct 3 ms 5980 KB Output is correct
14 Correct 3 ms 5980 KB Output is correct
15 Correct 4 ms 6040 KB Output is correct
16 Correct 4 ms 5980 KB Output is correct
17 Correct 4 ms 5980 KB Output is correct
18 Correct 2 ms 5724 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5724 KB Output is correct
2 Correct 3 ms 5920 KB Output is correct
3 Correct 2 ms 5724 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Correct 2 ms 5724 KB Output is correct
6 Correct 3 ms 5980 KB Output is correct
7 Correct 3 ms 5964 KB Output is correct
8 Correct 3 ms 6060 KB Output is correct
9 Correct 3 ms 6044 KB Output is correct
10 Correct 3 ms 5980 KB Output is correct
11 Correct 3 ms 5980 KB Output is correct
12 Correct 3 ms 5980 KB Output is correct
13 Correct 3 ms 5980 KB Output is correct
14 Correct 3 ms 5980 KB Output is correct
15 Correct 4 ms 6040 KB Output is correct
16 Correct 4 ms 5980 KB Output is correct
17 Correct 4 ms 5980 KB Output is correct
18 Correct 2 ms 5724 KB Output is correct
19 Correct 3 ms 5980 KB Output is correct
20 Correct 3 ms 5964 KB Output is correct
21 Correct 3 ms 6020 KB Output is correct
22 Correct 3 ms 5980 KB Output is correct
23 Correct 3 ms 5980 KB Output is correct
24 Correct 3 ms 5980 KB Output is correct
25 Correct 3 ms 5988 KB Output is correct
26 Correct 4 ms 5976 KB Output is correct
27 Correct 4 ms 5980 KB Output is correct
28 Correct 3 ms 5980 KB Output is correct
29 Correct 4 ms 5976 KB Output is correct
30 Correct 4 ms 5980 KB Output is correct

Subtask #4
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5720 KB Output is correct
2 Correct 57 ms 16940 KB Output is correct
3 Correct 58 ms 17236 KB Output is correct
4 Correct 59 ms 17436 KB Output is correct
5 Correct 62 ms 17888 KB Output is correct
6 Correct 61 ms 17840 KB Output is correct
7 Correct 61 ms 18000 KB Output is correct
8 Correct 2 ms 5720 KB Output is correct
9 Correct 2 ms 5724 KB Output is correct
10 Correct 3 ms 5920 KB Output is correct
11 Correct 2 ms 5724 KB Output is correct
12 Correct 2 ms 5724 KB Output is correct
13 Correct 2 ms 5724 KB Output is correct
14 Correct 3 ms 5980 KB Output is correct
15 Correct 3 ms 5964 KB Output is correct
16 Correct 3 ms 6060 KB Output is correct
17 Correct 3 ms 6044 KB Output is correct
18 Correct 3 ms 5980 KB Output is correct
19 Correct 3 ms 5980 KB Output is correct
20 Correct 3 ms 5980 KB Output is correct
21 Correct 3 ms 5980 KB Output is correct
22 Correct 3 ms 5980 KB Output is correct
23 Correct 4 ms 6040 KB Output is correct
24 Correct 4 ms 5980 KB Output is correct
25 Correct 4 ms 5980 KB Output is correct
26 Correct 2 ms 5724 KB Output is correct
27 Correct 3 ms 5980 KB Output is correct
28 Correct 3 ms 5964 KB Output is correct
29 Correct 3 ms 6020 KB Output is correct
30 Correct 3 ms 5980 KB Output is correct
31 Correct 3 ms 5980 KB Output is correct
32 Correct 3 ms 5980 KB Output is correct
33 Correct 3 ms 5988 KB Output is correct
34 Correct 4 ms 5976 KB Output is correct
35 Correct 4 ms 5980 KB Output is correct
36 Correct 3 ms 5980 KB Output is correct
37 Correct 4 ms 5976 KB Output is correct
38 Correct 4 ms 5980 KB Output is correct
39 Correct 127 ms 18000 KB Output is correct
40 Correct 95 ms 17300 KB Output is correct
41 Correct 92 ms 17232 KB Output is correct
42 Correct 92 ms 17232 KB Output is correct
43 Correct 91 ms 17232 KB Output is correct
44 Correct 91 ms 17232 KB Output is correct
45 Correct 133 ms 16996 KB Output is correct
46 Correct 99 ms 17236 KB Output is correct
47 Correct 100 ms 17204 KB Output is correct
48 Correct 117 ms 17088 KB Output is correct
49 Correct 127 ms 18136 KB Output is correct
50 Correct 122 ms 17744 KB Output is correct
51 Correct 107 ms 17748 KB Output is correct
52 Correct 171 ms 20732 KB Output is correct
53 Correct 154 ms 19660 KB Output is correct
54 Correct 163 ms 19716 KB Output is correct
55 Correct 190 ms 19960 KB Output is correct
56 Correct 217 ms 23096 KB Output is correct
57 Correct 217 ms 23104 KB Output is correct
58 Correct 219 ms 24228 KB Output is correct
59 Correct 211 ms 24120 KB Output is correct
60 Correct 226 ms 24136 KB Output is correct
61 Correct 243 ms 23708 KB Output is correct
62 Correct 218 ms 22844 KB Output is correct
63 Correct 206 ms 23160 KB Output is correct
64 Correct 209 ms 23112 KB Output is correct
65 Correct 237 ms 23160 KB Output is correct
66 Correct 265 ms 23160 KB Output is correct
67 Correct 212 ms 23280 KB Output is correct