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Submission #260598

# Submission time Handle Problem Language Result Execution time Memory
260598 2020-08-10T15:00:57 Z Toirov_Sadi Commuter Pass (JOI18_commuter_pass) C++17
100 / 100
 447 ms 33384 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 2e5 + 7;

int n;
int m;
int s;
int t;
int u;
int v;
int used[N];
long long res;
long long ds[N];
long long dt[N];
long long du[N];
long long dv[N];
long long dp[N];
vector<int> g1[N];
vector<pair<int, int>> g[N];
priority_queue<pair<long long, int>, vector<pair<long long, int>>, greater<pair<long long, int>>> q;
void dij(int s, long long *d){
    memset(d, 31, sizeof ds);
    memset(used, 0, sizeof used);

    d[s] = 0;
    q.push({d[s], s});
    while(!q.empty()){
        int v = q.top().second;
        q.pop();
        if(used[v] == 1) continue;

        used[v] = 1;
        for(auto to: g[v]){
            if(d[to.first] > d[v] + to.second){
                d[to.first] = d[v] + to.second;
                q.push({d[to.first], to.first});
            }
        }
    }
}
void dfs(int x){
    used[x] = 1;
    dp[x] = dv[x];
    for(auto to: g1[x]){
        if(used[to] == 0) dfs(to);

        dp[x] = min(dp[x], dp[to]);
    }
    res = min(res, du[x] + dp[x]);
}
int main()
{
    ios_base::sync_with_stdio(false);

    cin >> n >> m;
    cin >> s >> t >> u >> v;

    for(int i = 1; i <= m; i ++){
        int x, y, w;
        cin >> x >> y >> w;
        g[x].push_back({y, w});
        g[y].push_back({x, w});
    }
    dij(s, ds);
    dij(t, dt);
    dij(u, du);
    dij(v, dv);

    for(int x = 1; x <= n; x ++){
        for(auto to: g[x]){
            if(ds[x] + to.second + dt[to.first] == ds[t]){
                g1[x].push_back(to.first);
            }
        }
    }

    res = du[v];
    for(int i = 1; i <= 2; i ++){
        memset(used, 0, sizeof used);
        dfs(s);
        swap(du, dv);
    }
    cout << res << "\n";
}

Subtask #1
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 383 ms 28388 KB Output is correct
2 Correct 385 ms 28780 KB Output is correct
3 Correct 425 ms 33384 KB Output is correct
4 Correct 342 ms 29060 KB Output is correct
5 Correct 384 ms 29296 KB Output is correct
6 Correct 360 ms 28232 KB Output is correct
7 Correct 436 ms 29808 KB Output is correct
8 Correct 432 ms 29556 KB Output is correct
9 Correct 372 ms 28320 KB Output is correct
10 Correct 307 ms 28268 KB Output is correct
11 Correct 181 ms 25976 KB Output is correct
12 Correct 428 ms 28364 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 445 ms 30312 KB Output is correct
2 Correct 442 ms 30188 KB Output is correct
3 Correct 412 ms 29804 KB Output is correct
4 Correct 390 ms 30096 KB Output is correct
5 Correct 400 ms 30560 KB Output is correct
6 Correct 440 ms 32840 KB Output is correct
7 Correct 445 ms 32880 KB Output is correct
8 Correct 431 ms 30060 KB Output is correct
9 Correct 447 ms 30600 KB Output is correct
10 Correct 410 ms 29736 KB Output is correct
11 Correct 183 ms 27768 KB Output is correct
12 Correct 382 ms 33092 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 17784 KB Output is correct
2 Correct 13 ms 16768 KB Output is correct
3 Correct 13 ms 16768 KB Output is correct
4 Correct 35 ms 18816 KB Output is correct
5 Correct 26 ms 17792 KB Output is correct
6 Correct 13 ms 17024 KB Output is correct
7 Correct 14 ms 16896 KB Output is correct
8 Correct 19 ms 17024 KB Output is correct
9 Correct 17 ms 16896 KB Output is correct
10 Correct 20 ms 17792 KB Output is correct
11 Correct 13 ms 16768 KB Output is correct
12 Correct 13 ms 16768 KB Output is correct
13 Correct 12 ms 16768 KB Output is correct
14 Correct 12 ms 16768 KB Output is correct
15 Correct 14 ms 16896 KB Output is correct

Subtask #4
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 383 ms 28388 KB Output is correct
2 Correct 385 ms 28780 KB Output is correct
3 Correct 425 ms 33384 KB Output is correct
4 Correct 342 ms 29060 KB Output is correct
5 Correct 384 ms 29296 KB Output is correct
6 Correct 360 ms 28232 KB Output is correct
7 Correct 436 ms 29808 KB Output is correct
8 Correct 432 ms 29556 KB Output is correct
9 Correct 372 ms 28320 KB Output is correct
10 Correct 307 ms 28268 KB Output is correct
11 Correct 181 ms 25976 KB Output is correct
12 Correct 428 ms 28364 KB Output is correct
13 Correct 445 ms 30312 KB Output is correct
14 Correct 442 ms 30188 KB Output is correct
15 Correct 412 ms 29804 KB Output is correct
16 Correct 390 ms 30096 KB Output is correct
17 Correct 400 ms 30560 KB Output is correct
18 Correct 440 ms 32840 KB Output is correct
19 Correct 445 ms 32880 KB Output is correct
20 Correct 431 ms 30060 KB Output is correct
21 Correct 447 ms 30600 KB Output is correct
22 Correct 410 ms 29736 KB Output is correct
23 Correct 183 ms 27768 KB Output is correct
24 Correct 382 ms 33092 KB Output is correct
25 Correct 22 ms 17784 KB Output is correct
26 Correct 13 ms 16768 KB Output is correct
27 Correct 13 ms 16768 KB Output is correct
28 Correct 35 ms 18816 KB Output is correct
29 Correct 26 ms 17792 KB Output is correct
30 Correct 13 ms 17024 KB Output is correct
31 Correct 14 ms 16896 KB Output is correct
32 Correct 19 ms 17024 KB Output is correct
33 Correct 17 ms 16896 KB Output is correct
34 Correct 20 ms 17792 KB Output is correct
35 Correct 13 ms 16768 KB Output is correct
36 Correct 13 ms 16768 KB Output is correct
37 Correct 12 ms 16768 KB Output is correct
38 Correct 12 ms 16768 KB Output is correct
39 Correct 14 ms 16896 KB Output is correct
40 Correct 363 ms 28532 KB Output is correct
41 Correct 372 ms 28308 KB Output is correct
42 Correct 392 ms 28384 KB Output is correct
43 Correct 222 ms 28280 KB Output is correct
44 Correct 194 ms 28280 KB Output is correct
45 Correct 415 ms 30576 KB Output is correct
46 Correct 414 ms 30244 KB Output is correct
47 Correct 372 ms 28552 KB Output is correct
48 Correct 228 ms 26248 KB Output is correct
49 Correct 319 ms 28312 KB Output is correct
50 Correct 372 ms 29928 KB Output is correct
51 Correct 396 ms 30576 KB Output is correct