#include <bits/stdc++.h>
#define pb push_back
using namespace std;
int n, m, k, q;
const int N = 1e5 + 5;
using PII = pair <int, int>;
vector <PII> paths[N], check[N], cities;
int dis[N], par[N], ans[N];
bool open[N];
int find(int a) {
if (a == par[a]) return par[a];
return par[a] = find(par[a]);
}
void addEdges(int pos, int dist) {
for (auto& [b, c] : paths[pos]) {
if (!open[b]) continue;
int x = find(pos), y = find(b);
if (x == y) continue;
if (check[y].size() > check[x].size()) swap(x, y);
par[y] = x;
for (auto& [target, id] : check[y]) {
int z = find(target);
if (z == x) ans[id] = max(ans[id], dist);
else check[x].pb({target, id});
}
}
}
signed main() {
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
// freopen("in.txt", "r", stdin);
// freopen("out.txt", "w", stdout);
cin >> n >> m;
for (int i = 0; i < m; i++) {
int a, b, c; cin >> a >> b >> c;
paths[a].pb({b, c});
paths[b].pb({a, c});
}
cin >> k;
set <PII> bfs; // dist, pos;
for (int i = 0; i < k; i++) {
int x; cin >> x;
bfs.insert({0, x});
}
memset(dis, -1, sizeof(dis));
while(!bfs.empty()) {
int dist, pos;
auto it = bfs.begin();
tie(dist, pos) = *it;
bfs.erase(it);
if (dis[pos] != -1) continue;
cities.pb({pos, dist});
dis[pos] = dist;
for (auto& [b, c] : paths[pos]) {
if (dis[b] != -1) continue;
bfs.insert({dist+c, b});
}
}
cin >> q;
for (int i = 0; i < q; i++) {
int a, b; cin >> a >> b;
check[a].pb({b, i});
check[b].pb({a, i});
}
for (int i = 1; i <= n; i++) par[i] = i;
while(!cities.empty()) {
int pos, dist;
tie(pos, dist) = cities.back();
cities.pop_back();
open[pos] = 1;
addEdges(pos, dist);
}
for (int i = 0; i < q; i++) cout << ans[i] << '\n';
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
5388 KB |
Output is correct |
2 |
Correct |
4 ms |
5532 KB |
Output is correct |
3 |
Correct |
4 ms |
5540 KB |
Output is correct |
4 |
Correct |
3 ms |
5316 KB |
Output is correct |
5 |
Correct |
4 ms |
5452 KB |
Output is correct |
6 |
Correct |
4 ms |
5416 KB |
Output is correct |
7 |
Correct |
3 ms |
5324 KB |
Output is correct |
8 |
Correct |
3 ms |
5420 KB |
Output is correct |
9 |
Correct |
4 ms |
5452 KB |
Output is correct |
10 |
Correct |
4 ms |
5580 KB |
Output is correct |
11 |
Correct |
4 ms |
5452 KB |
Output is correct |
12 |
Correct |
5 ms |
5452 KB |
Output is correct |
13 |
Correct |
5 ms |
5544 KB |
Output is correct |
14 |
Correct |
4 ms |
5452 KB |
Output is correct |
15 |
Correct |
4 ms |
5452 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
5388 KB |
Output is correct |
2 |
Correct |
4 ms |
5532 KB |
Output is correct |
3 |
Correct |
4 ms |
5540 KB |
Output is correct |
4 |
Correct |
3 ms |
5316 KB |
Output is correct |
5 |
Correct |
4 ms |
5452 KB |
Output is correct |
6 |
Correct |
4 ms |
5416 KB |
Output is correct |
7 |
Correct |
3 ms |
5324 KB |
Output is correct |
8 |
Correct |
3 ms |
5420 KB |
Output is correct |
9 |
Correct |
4 ms |
5452 KB |
Output is correct |
10 |
Correct |
4 ms |
5580 KB |
Output is correct |
11 |
Correct |
4 ms |
5452 KB |
Output is correct |
12 |
Correct |
5 ms |
5452 KB |
Output is correct |
13 |
Correct |
5 ms |
5544 KB |
Output is correct |
14 |
Correct |
4 ms |
5452 KB |
Output is correct |
15 |
Correct |
4 ms |
5452 KB |
Output is correct |
16 |
Correct |
147 ms |
17956 KB |
Output is correct |
17 |
Correct |
775 ms |
46780 KB |
Output is correct |
18 |
Correct |
41 ms |
9108 KB |
Output is correct |
19 |
Correct |
155 ms |
20104 KB |
Output is correct |
20 |
Correct |
865 ms |
47504 KB |
Output is correct |
21 |
Correct |
340 ms |
26768 KB |
Output is correct |
22 |
Correct |
113 ms |
17500 KB |
Output is correct |
23 |
Correct |
814 ms |
46636 KB |
Output is correct |
24 |
Correct |
767 ms |
46656 KB |
Output is correct |
25 |
Correct |
819 ms |
47032 KB |
Output is correct |
26 |
Correct |
131 ms |
20344 KB |
Output is correct |
27 |
Correct |
144 ms |
20324 KB |
Output is correct |
28 |
Correct |
153 ms |
20056 KB |
Output is correct |
29 |
Correct |
152 ms |
20332 KB |
Output is correct |
30 |
Correct |
114 ms |
20400 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
5324 KB |
Output is correct |
2 |
Correct |
3 ms |
5400 KB |
Output is correct |
3 |
Correct |
4 ms |
5324 KB |
Output is correct |
4 |
Correct |
3 ms |
5324 KB |
Output is correct |
5 |
Correct |
5 ms |
5324 KB |
Output is correct |
6 |
Correct |
4 ms |
5452 KB |
Output is correct |
7 |
Correct |
4 ms |
5324 KB |
Output is correct |
8 |
Correct |
3 ms |
5324 KB |
Output is correct |
9 |
Correct |
4 ms |
5400 KB |
Output is correct |
10 |
Correct |
3 ms |
5400 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
191 ms |
20600 KB |
Output is correct |
2 |
Correct |
770 ms |
44460 KB |
Output is correct |
3 |
Correct |
819 ms |
44560 KB |
Output is correct |
4 |
Correct |
51 ms |
11528 KB |
Output is correct |
5 |
Correct |
791 ms |
44480 KB |
Output is correct |
6 |
Correct |
731 ms |
44556 KB |
Output is correct |
7 |
Correct |
736 ms |
44560 KB |
Output is correct |
8 |
Correct |
694 ms |
44576 KB |
Output is correct |
9 |
Correct |
673 ms |
44524 KB |
Output is correct |
10 |
Correct |
788 ms |
44520 KB |
Output is correct |
11 |
Correct |
728 ms |
44680 KB |
Output is correct |
12 |
Correct |
737 ms |
44584 KB |
Output is correct |
13 |
Correct |
715 ms |
44588 KB |
Output is correct |
14 |
Correct |
696 ms |
44768 KB |
Output is correct |
15 |
Correct |
690 ms |
45096 KB |
Output is correct |
16 |
Correct |
709 ms |
44540 KB |
Output is correct |
17 |
Correct |
701 ms |
44552 KB |
Output is correct |
18 |
Correct |
747 ms |
44592 KB |
Output is correct |
19 |
Correct |
70 ms |
11540 KB |
Output is correct |
20 |
Correct |
754 ms |
44552 KB |
Output is correct |
21 |
Correct |
661 ms |
50384 KB |
Output is correct |
22 |
Correct |
86 ms |
17160 KB |
Output is correct |
23 |
Correct |
65 ms |
12132 KB |
Output is correct |
24 |
Correct |
81 ms |
17104 KB |
Output is correct |
25 |
Correct |
79 ms |
17164 KB |
Output is correct |
26 |
Correct |
70 ms |
12292 KB |
Output is correct |
27 |
Correct |
50 ms |
11568 KB |
Output is correct |
28 |
Correct |
78 ms |
17040 KB |
Output is correct |
29 |
Correct |
44 ms |
11516 KB |
Output is correct |
30 |
Correct |
92 ms |
17112 KB |
Output is correct |
31 |
Correct |
56 ms |
11448 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
5388 KB |
Output is correct |
2 |
Correct |
4 ms |
5532 KB |
Output is correct |
3 |
Correct |
4 ms |
5540 KB |
Output is correct |
4 |
Correct |
3 ms |
5316 KB |
Output is correct |
5 |
Correct |
4 ms |
5452 KB |
Output is correct |
6 |
Correct |
4 ms |
5416 KB |
Output is correct |
7 |
Correct |
3 ms |
5324 KB |
Output is correct |
8 |
Correct |
3 ms |
5420 KB |
Output is correct |
9 |
Correct |
4 ms |
5452 KB |
Output is correct |
10 |
Correct |
4 ms |
5580 KB |
Output is correct |
11 |
Correct |
4 ms |
5452 KB |
Output is correct |
12 |
Correct |
5 ms |
5452 KB |
Output is correct |
13 |
Correct |
5 ms |
5544 KB |
Output is correct |
14 |
Correct |
4 ms |
5452 KB |
Output is correct |
15 |
Correct |
4 ms |
5452 KB |
Output is correct |
16 |
Correct |
147 ms |
17956 KB |
Output is correct |
17 |
Correct |
775 ms |
46780 KB |
Output is correct |
18 |
Correct |
41 ms |
9108 KB |
Output is correct |
19 |
Correct |
155 ms |
20104 KB |
Output is correct |
20 |
Correct |
865 ms |
47504 KB |
Output is correct |
21 |
Correct |
340 ms |
26768 KB |
Output is correct |
22 |
Correct |
113 ms |
17500 KB |
Output is correct |
23 |
Correct |
814 ms |
46636 KB |
Output is correct |
24 |
Correct |
767 ms |
46656 KB |
Output is correct |
25 |
Correct |
819 ms |
47032 KB |
Output is correct |
26 |
Correct |
131 ms |
20344 KB |
Output is correct |
27 |
Correct |
144 ms |
20324 KB |
Output is correct |
28 |
Correct |
153 ms |
20056 KB |
Output is correct |
29 |
Correct |
152 ms |
20332 KB |
Output is correct |
30 |
Correct |
114 ms |
20400 KB |
Output is correct |
31 |
Correct |
3 ms |
5324 KB |
Output is correct |
32 |
Correct |
3 ms |
5400 KB |
Output is correct |
33 |
Correct |
4 ms |
5324 KB |
Output is correct |
34 |
Correct |
3 ms |
5324 KB |
Output is correct |
35 |
Correct |
5 ms |
5324 KB |
Output is correct |
36 |
Correct |
4 ms |
5452 KB |
Output is correct |
37 |
Correct |
4 ms |
5324 KB |
Output is correct |
38 |
Correct |
3 ms |
5324 KB |
Output is correct |
39 |
Correct |
4 ms |
5400 KB |
Output is correct |
40 |
Correct |
3 ms |
5400 KB |
Output is correct |
41 |
Correct |
191 ms |
20600 KB |
Output is correct |
42 |
Correct |
770 ms |
44460 KB |
Output is correct |
43 |
Correct |
819 ms |
44560 KB |
Output is correct |
44 |
Correct |
51 ms |
11528 KB |
Output is correct |
45 |
Correct |
791 ms |
44480 KB |
Output is correct |
46 |
Correct |
731 ms |
44556 KB |
Output is correct |
47 |
Correct |
736 ms |
44560 KB |
Output is correct |
48 |
Correct |
694 ms |
44576 KB |
Output is correct |
49 |
Correct |
673 ms |
44524 KB |
Output is correct |
50 |
Correct |
788 ms |
44520 KB |
Output is correct |
51 |
Correct |
728 ms |
44680 KB |
Output is correct |
52 |
Correct |
737 ms |
44584 KB |
Output is correct |
53 |
Correct |
715 ms |
44588 KB |
Output is correct |
54 |
Correct |
696 ms |
44768 KB |
Output is correct |
55 |
Correct |
690 ms |
45096 KB |
Output is correct |
56 |
Correct |
709 ms |
44540 KB |
Output is correct |
57 |
Correct |
701 ms |
44552 KB |
Output is correct |
58 |
Correct |
747 ms |
44592 KB |
Output is correct |
59 |
Correct |
70 ms |
11540 KB |
Output is correct |
60 |
Correct |
754 ms |
44552 KB |
Output is correct |
61 |
Correct |
661 ms |
50384 KB |
Output is correct |
62 |
Correct |
86 ms |
17160 KB |
Output is correct |
63 |
Correct |
65 ms |
12132 KB |
Output is correct |
64 |
Correct |
81 ms |
17104 KB |
Output is correct |
65 |
Correct |
79 ms |
17164 KB |
Output is correct |
66 |
Correct |
70 ms |
12292 KB |
Output is correct |
67 |
Correct |
50 ms |
11568 KB |
Output is correct |
68 |
Correct |
78 ms |
17040 KB |
Output is correct |
69 |
Correct |
44 ms |
11516 KB |
Output is correct |
70 |
Correct |
92 ms |
17112 KB |
Output is correct |
71 |
Correct |
56 ms |
11448 KB |
Output is correct |
72 |
Correct |
238 ms |
23632 KB |
Output is correct |
73 |
Correct |
733 ms |
47420 KB |
Output is correct |
74 |
Correct |
722 ms |
47484 KB |
Output is correct |
75 |
Correct |
746 ms |
46644 KB |
Output is correct |
76 |
Correct |
748 ms |
46600 KB |
Output is correct |
77 |
Correct |
749 ms |
46652 KB |
Output is correct |
78 |
Correct |
770 ms |
46688 KB |
Output is correct |
79 |
Correct |
823 ms |
46628 KB |
Output is correct |
80 |
Correct |
844 ms |
46624 KB |
Output is correct |
81 |
Correct |
736 ms |
46668 KB |
Output is correct |
82 |
Correct |
815 ms |
46588 KB |
Output is correct |
83 |
Correct |
828 ms |
46584 KB |
Output is correct |
84 |
Correct |
750 ms |
46744 KB |
Output is correct |
85 |
Correct |
810 ms |
47972 KB |
Output is correct |
86 |
Correct |
726 ms |
46628 KB |
Output is correct |
87 |
Correct |
750 ms |
46648 KB |
Output is correct |
88 |
Correct |
819 ms |
47436 KB |
Output is correct |
89 |
Correct |
100 ms |
18412 KB |
Output is correct |
90 |
Correct |
701 ms |
46652 KB |
Output is correct |
91 |
Correct |
851 ms |
52284 KB |
Output is correct |
92 |
Correct |
149 ms |
20232 KB |
Output is correct |
93 |
Correct |
125 ms |
24472 KB |
Output is correct |
94 |
Correct |
137 ms |
19992 KB |
Output is correct |
95 |
Correct |
127 ms |
20020 KB |
Output is correct |
96 |
Correct |
143 ms |
25396 KB |
Output is correct |
97 |
Correct |
107 ms |
18996 KB |
Output is correct |
98 |
Correct |
147 ms |
20024 KB |
Output is correct |
99 |
Correct |
107 ms |
19524 KB |
Output is correct |
100 |
Correct |
176 ms |
20036 KB |
Output is correct |