#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll inf = 1e18;
int32_t main () {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int N, M;
cin >> N >> M;
vector<int> h(N), g[N];
vector<array<ll, 2>> dist(N);
for (int i = 0;i < N;i ++) {
cin >> h[i];
}
for (int i = 0;i < M;i ++) {
int u, v;
cin >> u >> v;
-- u;
-- v;
g[u].push_back(v);
g[v].push_back(u);
}
function<void(int, int)> dijikstra = [&](int si, int ti) -> void {
for (int i = 0;i < N;i ++) {
dist[i][ti] = inf;
}
dist[si][ti] = 0;
multiset<array<ll, 2>> dj;
dj.insert({dist[si][ti], si});
while (dj.size() > 0) {
auto [w, u] = *dj.begin();
dj.erase(dj.begin());
if (w != dist[u][ti]) continue;
for (auto v : g[u]) if (dist[v][ti] > max(1LL * h[v], dist[u][ti] + 1)) {
dist[v][ti] = max(1LL * h[v], dist[u][ti] + 1);
dj.insert({dist[v][ti], v});
}
}
};
dijikstra(0, 0);
dijikstra(N - 1, 1);
ll ans = inf;
for (int u = 0;u < N;u ++) {
ans = min(ans, max(dist[u][0], dist[u][1]) * 2);
for (auto v : g[u]) {
ans = min(ans, max(dist[v][0], dist[u][1]) * 2 + 1);
ans = min(ans, max(dist[u][0], dist[v][1]) * 2 + 1);
}
}
cout << ans << "\n";
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
55 ms |
15112 KB |
Output is correct |
| 3 |
Correct |
55 ms |
15440 KB |
Output is correct |
| 4 |
Correct |
54 ms |
15188 KB |
Output is correct |
| 5 |
Correct |
56 ms |
15184 KB |
Output is correct |
| 6 |
Correct |
57 ms |
15184 KB |
Output is correct |
| 7 |
Correct |
56 ms |
15188 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
344 KB |
Output is correct |
| 4 |
Correct |
0 ms |
344 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
348 KB |
Output is correct |
| 7 |
Correct |
1 ms |
604 KB |
Output is correct |
| 8 |
Correct |
2 ms |
600 KB |
Output is correct |
| 9 |
Correct |
1 ms |
600 KB |
Output is correct |
| 10 |
Correct |
1 ms |
604 KB |
Output is correct |
| 11 |
Correct |
1 ms |
604 KB |
Output is correct |
| 12 |
Correct |
1 ms |
404 KB |
Output is correct |
| 13 |
Correct |
1 ms |
600 KB |
Output is correct |
| 14 |
Correct |
2 ms |
600 KB |
Output is correct |
| 15 |
Correct |
2 ms |
604 KB |
Output is correct |
| 16 |
Correct |
2 ms |
604 KB |
Output is correct |
| 17 |
Correct |
2 ms |
604 KB |
Output is correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
344 KB |
Output is correct |
| 4 |
Correct |
0 ms |
344 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
348 KB |
Output is correct |
| 7 |
Correct |
1 ms |
604 KB |
Output is correct |
| 8 |
Correct |
2 ms |
600 KB |
Output is correct |
| 9 |
Correct |
1 ms |
600 KB |
Output is correct |
| 10 |
Correct |
1 ms |
604 KB |
Output is correct |
| 11 |
Correct |
1 ms |
604 KB |
Output is correct |
| 12 |
Correct |
1 ms |
404 KB |
Output is correct |
| 13 |
Correct |
1 ms |
600 KB |
Output is correct |
| 14 |
Correct |
2 ms |
600 KB |
Output is correct |
| 15 |
Correct |
2 ms |
604 KB |
Output is correct |
| 16 |
Correct |
2 ms |
604 KB |
Output is correct |
| 17 |
Correct |
2 ms |
604 KB |
Output is correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| 19 |
Correct |
1 ms |
604 KB |
Output is correct |
| 20 |
Correct |
1 ms |
604 KB |
Output is correct |
| 21 |
Correct |
1 ms |
604 KB |
Output is correct |
| 22 |
Correct |
1 ms |
624 KB |
Output is correct |
| 23 |
Correct |
1 ms |
604 KB |
Output is correct |
| 24 |
Correct |
2 ms |
600 KB |
Output is correct |
| 25 |
Correct |
1 ms |
604 KB |
Output is correct |
| 26 |
Correct |
2 ms |
488 KB |
Output is correct |
| 27 |
Correct |
2 ms |
600 KB |
Output is correct |
| 28 |
Correct |
2 ms |
604 KB |
Output is correct |
| 29 |
Correct |
2 ms |
604 KB |
Output is correct |
| 30 |
Correct |
2 ms |
604 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
55 ms |
15112 KB |
Output is correct |
| 3 |
Correct |
55 ms |
15440 KB |
Output is correct |
| 4 |
Correct |
54 ms |
15188 KB |
Output is correct |
| 5 |
Correct |
56 ms |
15184 KB |
Output is correct |
| 6 |
Correct |
57 ms |
15184 KB |
Output is correct |
| 7 |
Correct |
56 ms |
15188 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
344 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
344 KB |
Output is correct |
| 12 |
Correct |
0 ms |
344 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
604 KB |
Output is correct |
| 16 |
Correct |
2 ms |
600 KB |
Output is correct |
| 17 |
Correct |
1 ms |
600 KB |
Output is correct |
| 18 |
Correct |
1 ms |
604 KB |
Output is correct |
| 19 |
Correct |
1 ms |
604 KB |
Output is correct |
| 20 |
Correct |
1 ms |
404 KB |
Output is correct |
| 21 |
Correct |
1 ms |
600 KB |
Output is correct |
| 22 |
Correct |
2 ms |
600 KB |
Output is correct |
| 23 |
Correct |
2 ms |
604 KB |
Output is correct |
| 24 |
Correct |
2 ms |
604 KB |
Output is correct |
| 25 |
Correct |
2 ms |
604 KB |
Output is correct |
| 26 |
Correct |
0 ms |
348 KB |
Output is correct |
| 27 |
Correct |
1 ms |
604 KB |
Output is correct |
| 28 |
Correct |
1 ms |
604 KB |
Output is correct |
| 29 |
Correct |
1 ms |
604 KB |
Output is correct |
| 30 |
Correct |
1 ms |
624 KB |
Output is correct |
| 31 |
Correct |
1 ms |
604 KB |
Output is correct |
| 32 |
Correct |
2 ms |
600 KB |
Output is correct |
| 33 |
Correct |
1 ms |
604 KB |
Output is correct |
| 34 |
Correct |
2 ms |
488 KB |
Output is correct |
| 35 |
Correct |
2 ms |
600 KB |
Output is correct |
| 36 |
Correct |
2 ms |
604 KB |
Output is correct |
| 37 |
Correct |
2 ms |
604 KB |
Output is correct |
| 38 |
Correct |
2 ms |
604 KB |
Output is correct |
| 39 |
Correct |
149 ms |
19540 KB |
Output is correct |
| 40 |
Correct |
104 ms |
18772 KB |
Output is correct |
| 41 |
Correct |
103 ms |
18772 KB |
Output is correct |
| 42 |
Correct |
104 ms |
18772 KB |
Output is correct |
| 43 |
Correct |
104 ms |
18772 KB |
Output is correct |
| 44 |
Correct |
102 ms |
18772 KB |
Output is correct |
| 45 |
Correct |
135 ms |
18516 KB |
Output is correct |
| 46 |
Correct |
112 ms |
18772 KB |
Output is correct |
| 47 |
Correct |
111 ms |
18768 KB |
Output is correct |
| 48 |
Correct |
121 ms |
18568 KB |
Output is correct |
| 49 |
Correct |
153 ms |
19532 KB |
Output is correct |
| 50 |
Correct |
149 ms |
19280 KB |
Output is correct |
| 51 |
Correct |
130 ms |
19280 KB |
Output is correct |
| 52 |
Correct |
257 ms |
25176 KB |
Output is correct |
| 53 |
Correct |
209 ms |
23952 KB |
Output is correct |
| 54 |
Correct |
191 ms |
23776 KB |
Output is correct |
| 55 |
Correct |
217 ms |
24144 KB |
Output is correct |
| 56 |
Correct |
298 ms |
27988 KB |
Output is correct |
| 57 |
Correct |
283 ms |
28152 KB |
Output is correct |
| 58 |
Correct |
269 ms |
29268 KB |
Output is correct |
| 59 |
Correct |
263 ms |
29272 KB |
Output is correct |
| 60 |
Correct |
285 ms |
29008 KB |
Output is correct |
| 61 |
Correct |
288 ms |
28752 KB |
Output is correct |
| 62 |
Correct |
247 ms |
27732 KB |
Output is correct |
| 63 |
Correct |
243 ms |
28012 KB |
Output is correct |
| 64 |
Correct |
238 ms |
28072 KB |
Output is correct |
| 65 |
Correct |
235 ms |
27972 KB |
Output is correct |
| 66 |
Correct |
277 ms |
28072 KB |
Output is correct |
| 67 |
Correct |
273 ms |
28332 KB |
Output is correct |
