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Submission #485477

# Submission time Handle Problem Language Result Execution time Memory
485477 2021-11-08T00:54:09 Z SirCovidThe19th Evacuation plan (IZhO18_plan) C++17
100 / 100
 957 ms 54816 KB 
#include <bits/stdc++.h>
using namespace std;

#define FOR(i, x, y) for (int i = x; i < y; i++)
#define pii pair<int, int>
#define f first
#define s second

struct Edge{ int a, b, w; };

const int mx = 1e5 + 5;

int n, m, k, q, dist[mx], par[mx], ans[mx];
vector<Edge> edg; vector<pii> adj[mx]; set<int> qrys[mx];

void dijkstra(){
    priority_queue<pii, vector<pii>, greater<pii>> pq;
    fill(dist, dist + n + 1, 2e9);

    cin >> k;
    FOR(i, 0, k){ int x; cin >> x; dist[x] = 0; pq.push({0, x}); }

    while (!pq.empty()){
        int cdist, cur; tie(cdist, cur) = pq.top(); pq.pop();
        if (dist[cur] != cdist) continue;
        for (pii nxt : adj[cur]){
            int D = cdist + nxt.s;
            if (D < dist[nxt.f]) dist[nxt.f] = D, pq.push({D, nxt.f});
        }
    }
}
int get(int i){ 
    return i == par[i] ? i : par[i] = get(par[i]); 
}
void merge(int a, int b, int w){
    a = get(a); b = get(b); if (a == b) return;
    if (qrys[a].size() > qrys[b].size()) swap(qrys[a], qrys[b]);
    for (int x : qrys[a]){
        if (qrys[b].count(x)) ans[x] = w, qrys[b].erase(x);
        else qrys[b].insert(x);
    }
    par[a] = b;
}

int main(){
    cin >> n >> m;
    FOR(i, 1, m + 1){
        int a, b, w; cin >> a >> b >> w;
        adj[a].push_back({b, w}); adj[b].push_back({a, w});
        edg.push_back({a, b, w});
    }
    dijkstra();

    cin >> q;
    FOR(i, 1, q + 1){
        int a, b; cin >> a >> b;
        qrys[a].insert(i); qrys[b].insert(i);
    }

    for (Edge &E : edg) E.w = min(dist[E.a], dist[E.b]);
    sort(edg.begin(), edg.end(), [](Edge a, Edge b){ return a.w > b.w; });

    FOR(i, 1, n + 1) par[i] = i;
    for (Edge E : edg) merge(E.a, E.b, E.w);
    
    FOR(i, 1, q + 1) cout<<ans[i]<<endl;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7244 KB Output is correct
2 Correct 7 ms 7500 KB Output is correct
3 Correct 6 ms 7500 KB Output is correct
4 Correct 4 ms 7244 KB Output is correct
5 Correct 7 ms 7420 KB Output is correct
6 Correct 6 ms 7500 KB Output is correct
7 Correct 4 ms 7340 KB Output is correct
8 Correct 5 ms 7372 KB Output is correct
9 Correct 6 ms 7500 KB Output is correct
10 Correct 7 ms 7500 KB Output is correct
11 Correct 6 ms 7500 KB Output is correct
12 Correct 6 ms 7500 KB Output is correct
13 Correct 6 ms 7500 KB Output is correct
14 Correct 6 ms 7500 KB Output is correct
15 Correct 6 ms 7500 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7244 KB Output is correct
2 Correct 7 ms 7500 KB Output is correct
3 Correct 6 ms 7500 KB Output is correct
4 Correct 4 ms 7244 KB Output is correct
5 Correct 7 ms 7420 KB Output is correct
6 Correct 6 ms 7500 KB Output is correct
7 Correct 4 ms 7340 KB Output is correct
8 Correct 5 ms 7372 KB Output is correct
9 Correct 6 ms 7500 KB Output is correct
10 Correct 7 ms 7500 KB Output is correct
11 Correct 6 ms 7500 KB Output is correct
12 Correct 6 ms 7500 KB Output is correct
13 Correct 6 ms 7500 KB Output is correct
14 Correct 6 ms 7500 KB Output is correct
15 Correct 6 ms 7500 KB Output is correct
16 Correct 391 ms 23996 KB Output is correct
17 Correct 902 ms 40152 KB Output is correct
18 Correct 66 ms 10772 KB Output is correct
19 Correct 374 ms 23808 KB Output is correct
20 Correct 920 ms 40272 KB Output is correct
21 Correct 555 ms 30468 KB Output is correct
22 Correct 317 ms 23524 KB Output is correct
23 Correct 894 ms 40240 KB Output is correct
24 Correct 911 ms 40168 KB Output is correct
25 Correct 957 ms 40204 KB Output is correct
26 Correct 378 ms 23728 KB Output is correct
27 Correct 382 ms 23764 KB Output is correct
28 Correct 379 ms 23652 KB Output is correct
29 Correct 386 ms 23792 KB Output is correct
30 Correct 388 ms 23888 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7244 KB Output is correct
2 Correct 4 ms 7280 KB Output is correct
3 Correct 4 ms 7244 KB Output is correct
4 Correct 4 ms 7372 KB Output is correct
5 Correct 4 ms 7372 KB Output is correct
6 Correct 4 ms 7372 KB Output is correct
7 Correct 4 ms 7372 KB Output is correct
8 Correct 4 ms 7244 KB Output is correct
9 Correct 4 ms 7372 KB Output is correct
10 Correct 6 ms 7372 KB Output is correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 240 ms 18344 KB Output is correct
2 Correct 562 ms 30452 KB Output is correct
3 Correct 553 ms 30568 KB Output is correct
4 Correct 101 ms 12916 KB Output is correct
5 Correct 569 ms 30560 KB Output is correct
6 Correct 578 ms 30564 KB Output is correct
7 Correct 553 ms 30552 KB Output is correct
8 Correct 557 ms 30548 KB Output is correct
9 Correct 555 ms 30540 KB Output is correct
10 Correct 551 ms 30508 KB Output is correct
11 Correct 571 ms 30568 KB Output is correct
12 Correct 680 ms 30396 KB Output is correct
13 Correct 561 ms 30424 KB Output is correct
14 Correct 553 ms 30420 KB Output is correct
15 Correct 584 ms 31524 KB Output is correct
16 Correct 570 ms 30384 KB Output is correct
17 Correct 566 ms 30352 KB Output is correct
18 Correct 568 ms 30468 KB Output is correct
19 Correct 110 ms 12788 KB Output is correct
20 Correct 578 ms 30308 KB Output is correct
21 Correct 551 ms 30060 KB Output is correct
22 Correct 116 ms 14960 KB Output is correct
23 Correct 106 ms 13284 KB Output is correct
24 Correct 110 ms 14956 KB Output is correct
25 Correct 110 ms 14952 KB Output is correct
26 Correct 116 ms 13416 KB Output is correct
27 Correct 104 ms 12784 KB Output is correct
28 Correct 113 ms 14952 KB Output is correct
29 Correct 103 ms 12752 KB Output is correct
30 Correct 111 ms 14948 KB Output is correct
31 Correct 109 ms 12796 KB Output is correct

Subtask #5
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7244 KB Output is correct
2 Correct 7 ms 7500 KB Output is correct
3 Correct 6 ms 7500 KB Output is correct
4 Correct 4 ms 7244 KB Output is correct
5 Correct 7 ms 7420 KB Output is correct
6 Correct 6 ms 7500 KB Output is correct
7 Correct 4 ms 7340 KB Output is correct
8 Correct 5 ms 7372 KB Output is correct
9 Correct 6 ms 7500 KB Output is correct
10 Correct 7 ms 7500 KB Output is correct
11 Correct 6 ms 7500 KB Output is correct
12 Correct 6 ms 7500 KB Output is correct
13 Correct 6 ms 7500 KB Output is correct
14 Correct 6 ms 7500 KB Output is correct
15 Correct 6 ms 7500 KB Output is correct
16 Correct 391 ms 23996 KB Output is correct
17 Correct 902 ms 40152 KB Output is correct
18 Correct 66 ms 10772 KB Output is correct
19 Correct 374 ms 23808 KB Output is correct
20 Correct 920 ms 40272 KB Output is correct
21 Correct 555 ms 30468 KB Output is correct
22 Correct 317 ms 23524 KB Output is correct
23 Correct 894 ms 40240 KB Output is correct
24 Correct 911 ms 40168 KB Output is correct
25 Correct 957 ms 40204 KB Output is correct
26 Correct 378 ms 23728 KB Output is correct
27 Correct 382 ms 23764 KB Output is correct
28 Correct 379 ms 23652 KB Output is correct
29 Correct 386 ms 23792 KB Output is correct
30 Correct 388 ms 23888 KB Output is correct
31 Correct 4 ms 7244 KB Output is correct
32 Correct 4 ms 7280 KB Output is correct
33 Correct 4 ms 7244 KB Output is correct
34 Correct 4 ms 7372 KB Output is correct
35 Correct 4 ms 7372 KB Output is correct
36 Correct 4 ms 7372 KB Output is correct
37 Correct 4 ms 7372 KB Output is correct
38 Correct 4 ms 7244 KB Output is correct
39 Correct 4 ms 7372 KB Output is correct
40 Correct 6 ms 7372 KB Output is correct
41 Correct 240 ms 18344 KB Output is correct
42 Correct 562 ms 30452 KB Output is correct
43 Correct 553 ms 30568 KB Output is correct
44 Correct 101 ms 12916 KB Output is correct
45 Correct 569 ms 30560 KB Output is correct
46 Correct 578 ms 30564 KB Output is correct
47 Correct 553 ms 30552 KB Output is correct
48 Correct 557 ms 30548 KB Output is correct
49 Correct 555 ms 30540 KB Output is correct
50 Correct 551 ms 30508 KB Output is correct
51 Correct 571 ms 30568 KB Output is correct
52 Correct 680 ms 30396 KB Output is correct
53 Correct 561 ms 30424 KB Output is correct
54 Correct 553 ms 30420 KB Output is correct
55 Correct 584 ms 31524 KB Output is correct
56 Correct 570 ms 30384 KB Output is correct
57 Correct 566 ms 30352 KB Output is correct
58 Correct 568 ms 30468 KB Output is correct
59 Correct 110 ms 12788 KB Output is correct
60 Correct 578 ms 30308 KB Output is correct
61 Correct 551 ms 30060 KB Output is correct
62 Correct 116 ms 14960 KB Output is correct
63 Correct 106 ms 13284 KB Output is correct
64 Correct 110 ms 14956 KB Output is correct
65 Correct 110 ms 14952 KB Output is correct
66 Correct 116 ms 13416 KB Output is correct
67 Correct 104 ms 12784 KB Output is correct
68 Correct 113 ms 14952 KB Output is correct
69 Correct 103 ms 12752 KB Output is correct
70 Correct 111 ms 14948 KB Output is correct
71 Correct 109 ms 12796 KB Output is correct
72 Correct 570 ms 32816 KB Output is correct
73 Correct 925 ms 41108 KB Output is correct
74 Correct 894 ms 41048 KB Output is correct
75 Correct 889 ms 40824 KB Output is correct
76 Correct 892 ms 40700 KB Output is correct
77 Correct 941 ms 40836 KB Output is correct
78 Correct 904 ms 40852 KB Output is correct
79 Correct 889 ms 40868 KB Output is correct
80 Correct 890 ms 40804 KB Output is correct
81 Correct 914 ms 40924 KB Output is correct
82 Correct 909 ms 40888 KB Output is correct
83 Correct 897 ms 40864 KB Output is correct
84 Correct 940 ms 40688 KB Output is correct
85 Correct 907 ms 40780 KB Output is correct
86 Correct 896 ms 40716 KB Output is correct
87 Correct 906 ms 40792 KB Output is correct
88 Correct 902 ms 40752 KB Output is correct
89 Correct 399 ms 25572 KB Output is correct
90 Correct 901 ms 40680 KB Output is correct
91 Correct 910 ms 42344 KB Output is correct
92 Correct 413 ms 25852 KB Output is correct
93 Correct 514 ms 51824 KB Output is correct
94 Correct 425 ms 25680 KB Output is correct
95 Correct 406 ms 25680 KB Output is correct
96 Correct 539 ms 54816 KB Output is correct
97 Correct 424 ms 27516 KB Output is correct
98 Correct 426 ms 25704 KB Output is correct
99 Correct 429 ms 27512 KB Output is correct
100 Correct 434 ms 25788 KB Output is correct