oj.uz

Submission #886689

# Submission time Handle Problem Language Result Execution time Memory
886689 2023-12-12T16:23:26 Z fanwen Airplane (NOI23_airplane) C++17
100 / 100
 272 ms 21064 KB 
/* author : bo may can 5 */

#include <bits/stdc++.h>

using namespace std;

#define fi first
#define se second
#define ll long long
#define file(name)                  \
    if(fopen(name".inp", "r"))      \
        freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout); 

const int MAX = 2e5 + 5;

int n, m, a[MAX], f[MAX], g[MAX];
vector <int> adj[MAX];

void dp(int s, int f[]) {
	fill(f + 1, f + n + 1, INT_MAX);
	priority_queue <pair <int, int>, vector <pair <int, int>>, greater <pair <int, int>>> q;
	q.emplace(f[s] = a[s], s);
	while(!q.empty()) {
		auto [du, u] = q.top(); q.pop();
		if(f[u] != du) continue;
		for (auto v : adj[u]) if(f[v] > max(f[u] + 1, a[v])) {
			f[v] = max(f[u] + 1, a[v]);
			q.emplace(f[v], v);
		}
	}
}

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

    dp(1, f), dp(n, g);
    int ans = INT_MAX;
    for (int i = 1; i <= n; ++i) ans = min(ans, max(f[i], g[i]) * 2);
    // for (int i = 1; i <= n; ++i) cout << f[i] << " \n"[i == n];
    // for (int i = 1; i <= n; ++i) cout << g[i] << " \n"[i == n];
    for (int u = 1; u <= n; ++u) {
    	for (auto v : adj[u]) {
    		ans = min(ans, max(f[u], g[v]) * 2 + 1);
    	}
    }
    cout << ans;
}

signed main() {

#ifdef LOCAL
    freopen("TASK.inp", "r", stdin);
    freopen("TASK.out", "w", stdout);
#endif
    file("airplane");
    auto start_time = chrono::steady_clock::now();

    cin.tie(0), cout.tie(0) -> sync_with_stdio(0);

    you_make_it();

    auto end_time = chrono::steady_clock::now();

    cerr << "\nExecution time : " << chrono::duration_cast <chrono::milliseconds> (end_time - start_time).count() << "[ms]" << endl;

    return (0 ^ 0);
}

// Dream it. Wish it. Do it.

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:12:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |         freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:61:5: note: in expansion of macro 'file'
   61 |     file("airplane");
      |     ^~~~
Main.cpp:12:49: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |         freopen(name".inp", "r", stdin), freopen(name".out", "w", stdout);
      |                                          ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:61:5: note: in expansion of macro 'file'
   61 |     file("airplane");
      |     ^~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6744 KB Output is correct
2 Correct 57 ms 15444 KB Output is correct
3 Correct 59 ms 15740 KB Output is correct
4 Correct 60 ms 15792 KB Output is correct
5 Correct 72 ms 16016 KB Output is correct
6 Correct 60 ms 15972 KB Output is correct
7 Correct 61 ms 16040 KB Output is correct
8 Correct 1 ms 6748 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 7000 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 1 ms 6752 KB Output is correct
4 Correct 2 ms 7000 KB Output is correct
5 Correct 1 ms 6744 KB Output is correct
6 Correct 2 ms 6744 KB Output is correct
7 Correct 2 ms 6744 KB Output is correct
8 Correct 2 ms 6748 KB Output is correct
9 Correct 2 ms 6748 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 3 ms 7004 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 3 ms 6744 KB Output is correct
15 Correct 3 ms 6808 KB Output is correct
16 Correct 3 ms 6748 KB Output is correct
17 Correct 3 ms 6748 KB Output is correct
18 Correct 1 ms 6792 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 7000 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 1 ms 6752 KB Output is correct
4 Correct 2 ms 7000 KB Output is correct
5 Correct 1 ms 6744 KB Output is correct
6 Correct 2 ms 6744 KB Output is correct
7 Correct 2 ms 6744 KB Output is correct
8 Correct 2 ms 6748 KB Output is correct
9 Correct 2 ms 6748 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 3 ms 7004 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 3 ms 6744 KB Output is correct
15 Correct 3 ms 6808 KB Output is correct
16 Correct 3 ms 6748 KB Output is correct
17 Correct 3 ms 6748 KB Output is correct
18 Correct 1 ms 6792 KB Output is correct
19 Correct 3 ms 6748 KB Output is correct
20 Correct 2 ms 6748 KB Output is correct
21 Correct 3 ms 6748 KB Output is correct
22 Correct 3 ms 6748 KB Output is correct
23 Correct 3 ms 6748 KB Output is correct
24 Correct 2 ms 6748 KB Output is correct
25 Correct 4 ms 6748 KB Output is correct
26 Correct 2 ms 6748 KB Output is correct
27 Correct 3 ms 6864 KB Output is correct
28 Correct 3 ms 6748 KB Output is correct
29 Correct 3 ms 6748 KB Output is correct
30 Correct 3 ms 6748 KB Output is correct

Subtask #4
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6744 KB Output is correct
2 Correct 57 ms 15444 KB Output is correct
3 Correct 59 ms 15740 KB Output is correct
4 Correct 60 ms 15792 KB Output is correct
5 Correct 72 ms 16016 KB Output is correct
6 Correct 60 ms 15972 KB Output is correct
7 Correct 61 ms 16040 KB Output is correct
8 Correct 1 ms 6748 KB Output is correct
9 Correct 1 ms 7000 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 1 ms 6752 KB Output is correct
12 Correct 2 ms 7000 KB Output is correct
13 Correct 1 ms 6744 KB Output is correct
14 Correct 2 ms 6744 KB Output is correct
15 Correct 2 ms 6744 KB Output is correct
16 Correct 2 ms 6748 KB Output is correct
17 Correct 2 ms 6748 KB Output is correct
18 Correct 2 ms 6748 KB Output is correct
19 Correct 2 ms 6748 KB Output is correct
20 Correct 3 ms 7004 KB Output is correct
21 Correct 2 ms 6748 KB Output is correct
22 Correct 3 ms 6744 KB Output is correct
23 Correct 3 ms 6808 KB Output is correct
24 Correct 3 ms 6748 KB Output is correct
25 Correct 3 ms 6748 KB Output is correct
26 Correct 1 ms 6792 KB Output is correct
27 Correct 3 ms 6748 KB Output is correct
28 Correct 2 ms 6748 KB Output is correct
29 Correct 3 ms 6748 KB Output is correct
30 Correct 3 ms 6748 KB Output is correct
31 Correct 3 ms 6748 KB Output is correct
32 Correct 2 ms 6748 KB Output is correct
33 Correct 4 ms 6748 KB Output is correct
34 Correct 2 ms 6748 KB Output is correct
35 Correct 3 ms 6864 KB Output is correct
36 Correct 3 ms 6748 KB Output is correct
37 Correct 3 ms 6748 KB Output is correct
38 Correct 3 ms 6748 KB Output is correct
39 Correct 148 ms 16108 KB Output is correct
40 Correct 79 ms 15696 KB Output is correct
41 Correct 80 ms 15696 KB Output is correct
42 Correct 83 ms 15700 KB Output is correct
43 Correct 84 ms 15848 KB Output is correct
44 Correct 82 ms 15696 KB Output is correct
45 Correct 112 ms 15696 KB Output is correct
46 Correct 85 ms 15640 KB Output is correct
47 Correct 85 ms 15696 KB Output is correct
48 Correct 116 ms 15696 KB Output is correct
49 Correct 119 ms 16132 KB Output is correct
50 Correct 115 ms 16096 KB Output is correct
51 Correct 170 ms 16092 KB Output is correct
52 Correct 172 ms 18288 KB Output is correct
53 Correct 148 ms 17488 KB Output is correct
54 Correct 178 ms 17808 KB Output is correct
55 Correct 195 ms 17740 KB Output is correct
56 Correct 239 ms 20616 KB Output is correct
57 Correct 241 ms 20416 KB Output is correct
58 Correct 258 ms 20904 KB Output is correct
59 Correct 263 ms 20960 KB Output is correct
60 Correct 209 ms 21064 KB Output is correct
61 Correct 272 ms 20696 KB Output is correct
62 Correct 212 ms 20460 KB Output is correct
63 Correct 210 ms 20396 KB Output is correct
64 Correct 180 ms 20556 KB Output is correct
65 Correct 178 ms 20388 KB Output is correct
66 Correct 228 ms 20532 KB Output is correct
67 Correct 233 ms 20620 KB Output is correct