oj.uz

Submission #407571

# Submission time Handle Problem Language Result Execution time Memory
407571 2021-05-19T03:19:46 Z LittleFlowers__ Commuter Pass (JOI18_commuter_pass) C++17
100 / 100
 610 ms 19532 KB 
/*input
6 6
1 6
1 4
1 2 1
2 3 1
3 5 1
2 4 3
4 5 2
5 6 1
*/
#include <bits/stdc++.h>
using namespace std;

int n, m, s, t, u, v;
vector<pair<int, int>> ad[100010];

void dij(int fw, vector<long long>&f) {
    fill(f.begin(), f.end(), 1e15);
    priority_queue<pair<long long, int>, vector<pair<long long, int>>, greater<pair<long long, int>>> q;
    q.push({0, fw}); f[fw] = 0;
    while (q.size()) {
        long long w; int u; tie(w, u) = q.top(); q.pop();
        for (auto v : ad[u]) {
            if (f[v.first] > w + v.second) {
                f[v.first] = w + v.second;
                q.push({w + v.second, v.first});
            }
        }
    }
}

main() {
    cin  >> n >> m >> s >> t >> u >> v;

    for (int i = 0; i < m; ++i) {
        int x, y, w; cin >> x >> y >> w;
        ad[x].push_back({y, w});
        ad[y].push_back({x, w});
    }

    vector<long long> fs(n + 1), ft(n + 1), fu(n + 1), fv(n + 1);

    dij(t, ft);
    dij(u, fu);
    dij(v, fv);
    dij(s, fs);


    long long ret = fu[v];
    for (int i = 0; i < 2; ++i) {
        vector<long long> f(n + 1, 1e15), pf(n + 1, 1e15);
        priority_queue<pair<long long, int>, vector<pair<long long, int>>, greater<pair<long long, int>>> q; q.push({0, s}); f[s] = 0; pf[s] = fu[s];
        while (q.size()) {
            long long w; int  u; tie(w, u) = q.top(); q.pop();
            ret = min(ret, pf[u] + fv[u]);
            for (auto v : ad[u]) {
                if (fs[v.first] + ft[v.first] == fs[t]) {
                    pf[v.first] = min({pf[v.first], fu[v.first], pf[u]});
                    if (f[v.first] > w + v.second) {
                        f[v.first] = w + v.second;
                        q.push({w + v.second, v.first});
                    }
                }
            }
        }
        swap(fu, fv);
    }
    cout << ret;
}

Compilation message

commuter_pass.cpp:33:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   33 | main() {
      | ^~~~

Subtask #1
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 473 ms 15272 KB Output is correct
2 Correct 484 ms 13976 KB Output is correct
3 Correct 537 ms 14508 KB Output is correct
4 Correct 466 ms 15100 KB Output is correct
5 Correct 502 ms 13908 KB Output is correct
6 Correct 518 ms 15268 KB Output is correct
7 Correct 508 ms 14124 KB Output is correct
8 Correct 510 ms 13924 KB Output is correct
9 Correct 474 ms 13832 KB Output is correct
10 Correct 405 ms 13712 KB Output is correct
11 Correct 208 ms 10436 KB Output is correct
12 Correct 485 ms 14172 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 511 ms 14152 KB Output is correct
2 Correct 529 ms 13920 KB Output is correct
3 Correct 507 ms 13928 KB Output is correct
4 Correct 509 ms 14076 KB Output is correct
5 Correct 531 ms 17436 KB Output is correct
6 Correct 546 ms 18196 KB Output is correct
7 Correct 610 ms 17928 KB Output is correct
8 Correct 564 ms 17424 KB Output is correct
9 Correct 544 ms 17568 KB Output is correct
10 Correct 547 ms 17392 KB Output is correct
11 Correct 226 ms 12512 KB Output is correct
12 Correct 544 ms 18152 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 3276 KB Output is correct
2 Correct 3 ms 2636 KB Output is correct
3 Correct 3 ms 2636 KB Output is correct
4 Correct 46 ms 4004 KB Output is correct
5 Correct 23 ms 3340 KB Output is correct
6 Correct 4 ms 2636 KB Output is correct
7 Correct 5 ms 2636 KB Output is correct
8 Correct 6 ms 2764 KB Output is correct
9 Correct 4 ms 2636 KB Output is correct
10 Correct 24 ms 3248 KB Output is correct
11 Correct 3 ms 2636 KB Output is correct
12 Correct 3 ms 2636 KB Output is correct
13 Correct 3 ms 2636 KB Output is correct
14 Correct 3 ms 2636 KB Output is correct
15 Correct 4 ms 2636 KB Output is correct

Subtask #4
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 473 ms 15272 KB Output is correct
2 Correct 484 ms 13976 KB Output is correct
3 Correct 537 ms 14508 KB Output is correct
4 Correct 466 ms 15100 KB Output is correct
5 Correct 502 ms 13908 KB Output is correct
6 Correct 518 ms 15268 KB Output is correct
7 Correct 508 ms 14124 KB Output is correct
8 Correct 510 ms 13924 KB Output is correct
9 Correct 474 ms 13832 KB Output is correct
10 Correct 405 ms 13712 KB Output is correct
11 Correct 208 ms 10436 KB Output is correct
12 Correct 485 ms 14172 KB Output is correct
13 Correct 511 ms 14152 KB Output is correct
14 Correct 529 ms 13920 KB Output is correct
15 Correct 507 ms 13928 KB Output is correct
16 Correct 509 ms 14076 KB Output is correct
17 Correct 531 ms 17436 KB Output is correct
18 Correct 546 ms 18196 KB Output is correct
19 Correct 610 ms 17928 KB Output is correct
20 Correct 564 ms 17424 KB Output is correct
21 Correct 544 ms 17568 KB Output is correct
22 Correct 547 ms 17392 KB Output is correct
23 Correct 226 ms 12512 KB Output is correct
24 Correct 544 ms 18152 KB Output is correct
25 Correct 25 ms 3276 KB Output is correct
26 Correct 3 ms 2636 KB Output is correct
27 Correct 3 ms 2636 KB Output is correct
28 Correct 46 ms 4004 KB Output is correct
29 Correct 23 ms 3340 KB Output is correct
30 Correct 4 ms 2636 KB Output is correct
31 Correct 5 ms 2636 KB Output is correct
32 Correct 6 ms 2764 KB Output is correct
33 Correct 4 ms 2636 KB Output is correct
34 Correct 24 ms 3248 KB Output is correct
35 Correct 3 ms 2636 KB Output is correct
36 Correct 3 ms 2636 KB Output is correct
37 Correct 3 ms 2636 KB Output is correct
38 Correct 3 ms 2636 KB Output is correct
39 Correct 4 ms 2636 KB Output is correct
40 Correct 499 ms 19532 KB Output is correct
41 Correct 514 ms 18196 KB Output is correct
42 Correct 531 ms 18244 KB Output is correct
43 Correct 269 ms 12548 KB Output is correct
44 Correct 306 ms 12588 KB Output is correct
45 Correct 609 ms 18592 KB Output is correct
46 Correct 538 ms 18436 KB Output is correct
47 Correct 482 ms 18828 KB Output is correct
48 Correct 255 ms 12100 KB Output is correct
49 Correct 422 ms 19032 KB Output is correct
50 Correct 528 ms 17952 KB Output is correct
51 Correct 516 ms 18616 KB Output is correct