oj.uz

Submission #517141

# Submission time Handle Problem Language Result Execution time Memory
517141 2022-01-22T15:40:20 Z status_coding Commuter Pass (JOI18_commuter_pass) C++14
100 / 100
 667 ms 28112 KB 
#include <bits/stdc++.h>

using namespace std;

long long n,m,s,t,a,b,ans;
vector<pair<long long, long long>> v[100005];

long long len[100005][4];
long long dp[100005][2];

void djikstra(int s, int nr)
{
    for(int i=1;i<=n;i++)
        len[i][nr] = 1e18;

    multiset<pair<long long, long long>> mul;
    mul.insert({0, s});

    while(!mul.empty())
    {
        long long p = mul.begin()->second;
        long long val = mul.begin()->first;
        mul.erase(mul.begin());

        if(len[p][nr] != 1e18)
            continue;

        len[p][nr] = val;

        for(auto it : v[p])
        {
            if(len[it.first][nr] != 1e18)
                continue;

            mul.insert({val + it.second, it.first});
        }
    }
}

void calcDp0(int p)
{
    if(dp[p][0] != 1e18)
        return;

    dp[p][0] = len[p][1];

    for(auto it : v[p])
        if(len[p][0] - it.second == len[it.first][0])
        {
            calcDp0(it.first);
            dp[p][0] = min(dp[p][0], dp[it.first][0]);
        }
}

void calcDp1(int p)
{
    if(dp[p][1] != 1e18)
        return;

    dp[p][1] = len[p][1];

    for(auto it : v[p])
        if(len[p][0] + it.second == len[it.first][0] && dp[it.first][0] != 1e18)
        {
            calcDp1(it.first);
            dp[p][1] = min(dp[p][1], dp[it.first][1]);
        }
}

int main()
{
    cin>>n>>m>>s>>t>>a>>b;

    for(int i=1;i<=m;i++)
    {
        int x, y, c;
        cin>>x>>y>>c;

        v[x].push_back({y, c});
        v[y].push_back({x, c});
    }

    djikstra(t, 0);
    djikstra(b, 1);
    djikstra(a, 2);

    ans = len[a][1];

    for(int i=1;i<=n;i++)
        dp[i][0] = dp[i][1] = 1e18;

    calcDp0(s);
    calcDp1(t);

    for(int i=1;i<=n;i++)
        ans = min(ans, min(dp[i][0], dp[i][1]) + len[i][2]);

    cout<<ans;
    return 0;
}

Subtask #1
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 588 ms 24388 KB Output is correct
2 Correct 479 ms 22828 KB Output is correct
3 Correct 523 ms 28112 KB Output is correct
4 Correct 601 ms 23348 KB Output is correct
5 Correct 490 ms 21980 KB Output is correct
6 Correct 605 ms 24472 KB Output is correct
7 Correct 492 ms 22844 KB Output is correct
8 Correct 501 ms 22844 KB Output is correct
9 Correct 543 ms 22780 KB Output is correct
10 Correct 508 ms 22696 KB Output is correct
11 Correct 193 ms 15732 KB Output is correct
12 Correct 536 ms 22852 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 585 ms 25428 KB Output is correct
2 Correct 487 ms 24700 KB Output is correct
3 Correct 486 ms 24096 KB Output is correct
4 Correct 504 ms 24496 KB Output is correct
5 Correct 482 ms 24908 KB Output is correct
6 Correct 520 ms 27336 KB Output is correct
7 Correct 505 ms 27168 KB Output is correct
8 Correct 481 ms 24428 KB Output is correct
9 Correct 499 ms 24944 KB Output is correct
10 Correct 482 ms 24052 KB Output is correct
11 Correct 178 ms 17348 KB Output is correct
12 Correct 522 ms 27860 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 4684 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 67 ms 6708 KB Output is correct
5 Correct 31 ms 4936 KB Output is correct
6 Correct 3 ms 2764 KB Output is correct
7 Correct 5 ms 2764 KB Output is correct
8 Correct 6 ms 2892 KB Output is correct
9 Correct 3 ms 2764 KB Output is correct
10 Correct 32 ms 4920 KB Output is correct
11 Correct 2 ms 2636 KB Output is correct
12 Correct 2 ms 2636 KB Output is correct
13 Correct 2 ms 2636 KB Output is correct
14 Correct 3 ms 2636 KB Output is correct
15 Correct 3 ms 2636 KB Output is correct

Subtask #4
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 588 ms 24388 KB Output is correct
2 Correct 479 ms 22828 KB Output is correct
3 Correct 523 ms 28112 KB Output is correct
4 Correct 601 ms 23348 KB Output is correct
5 Correct 490 ms 21980 KB Output is correct
6 Correct 605 ms 24472 KB Output is correct
7 Correct 492 ms 22844 KB Output is correct
8 Correct 501 ms 22844 KB Output is correct
9 Correct 543 ms 22780 KB Output is correct
10 Correct 508 ms 22696 KB Output is correct
11 Correct 193 ms 15732 KB Output is correct
12 Correct 536 ms 22852 KB Output is correct
13 Correct 585 ms 25428 KB Output is correct
14 Correct 487 ms 24700 KB Output is correct
15 Correct 486 ms 24096 KB Output is correct
16 Correct 504 ms 24496 KB Output is correct
17 Correct 482 ms 24908 KB Output is correct
18 Correct 520 ms 27336 KB Output is correct
19 Correct 505 ms 27168 KB Output is correct
20 Correct 481 ms 24428 KB Output is correct
21 Correct 499 ms 24944 KB Output is correct
22 Correct 482 ms 24052 KB Output is correct
23 Correct 178 ms 17348 KB Output is correct
24 Correct 522 ms 27860 KB Output is correct
25 Correct 35 ms 4684 KB Output is correct
26 Correct 2 ms 2636 KB Output is correct
27 Correct 2 ms 2636 KB Output is correct
28 Correct 67 ms 6708 KB Output is correct
29 Correct 31 ms 4936 KB Output is correct
30 Correct 3 ms 2764 KB Output is correct
31 Correct 5 ms 2764 KB Output is correct
32 Correct 6 ms 2892 KB Output is correct
33 Correct 3 ms 2764 KB Output is correct
34 Correct 32 ms 4920 KB Output is correct
35 Correct 2 ms 2636 KB Output is correct
36 Correct 2 ms 2636 KB Output is correct
37 Correct 2 ms 2636 KB Output is correct
38 Correct 3 ms 2636 KB Output is correct
39 Correct 3 ms 2636 KB Output is correct
40 Correct 667 ms 26216 KB Output is correct
41 Correct 602 ms 25076 KB Output is correct
42 Correct 601 ms 24900 KB Output is correct
43 Correct 222 ms 18456 KB Output is correct
44 Correct 203 ms 18520 KB Output is correct
45 Correct 499 ms 23960 KB Output is correct
46 Correct 503 ms 23748 KB Output is correct
47 Correct 580 ms 26656 KB Output is correct
48 Correct 182 ms 15472 KB Output is correct
49 Correct 590 ms 27432 KB Output is correct
50 Correct 479 ms 24336 KB Output is correct
51 Correct 493 ms 24008 KB Output is correct