oj.uz

Submission #1007961

# Submission time Handle Problem Language Result Execution time Memory
1007961 2024-06-26T03:30:24 Z phong Olympic Bus (JOI20_ho_t4) C++17
100 / 100
 402 ms 6992 KB 
#include<bits/stdc++.h>

#define ll long long
#define int long long
const int nmax = 200 + 5, N = 3e5 + 5;
const ll oo = 1e18;
const int lg = 7, M = 4e3;
const int base = 2e5, mod = 998244353;
#define pii pair<ll, ll>
#define fi first
#define se second
#define endl "\n"
#define debug(a, n) for(int i = 1; i <= n; ++i) cout << a[i] << ' ';cout << endl
using namespace std;


multiset<pii> adj[nmax];
struct node{
    int u, v, c, d;
}a[N];
ll f[nmax][nmax];
int n, m;
priority_queue<pii, vector<pii>, greater<pii>> q;
ll dp[nmax];
ll dist(int x){
    for(int i = 1; i <= n; ++i) dp[i] = oo;
    q.push({0, x});
    dp[x] =0;
    while(q.size()){
        pii tmp = q.top();q.pop();
        int u = tmp.se;
        ll val = tmp.fi;
        if(val != dp[u]) continue;
        for(auto [v, w] : adj[u]){
            if(dp[v] > dp[u] + w){
                dp[v] = dp[u] + w;
                q.push({dp[v], v});
            }
        }
    }
    if(x == 1) return dp[n];
    return dp[1];
}
main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
//        freopen("code.inp", "r", stdin);
//        freopen("code.out", "w", stdout);
    cin >> n >> m;
    memset(f, 0x3f, sizeof f);
    for(int i = 1; i <= n; ++i) f[i][i] =0;
    for(int i = 1; i <= m; ++i){
        int u, v, c, d;
        cin >> u >> v >> c >> d;
        a[i] = {u, v, c, d};
        adj[u].insert({v, c});
        f[u][v] = min(f[u][v], 1ll*c);
    }
    for(int k = 1; k <= n; ++k){
        for(int i = 1; i <= n; ++i){
            for(int j = 1; j <= n; ++j){
                f[i][j] = min(f[i][j], f[i][k] + f[k][j]);
            }
        }
    }
//    for(int i = 1; i <= n; ++i){
//        for(int j = 1; j <= n; ++j){
//            cout << f[i][j] << ' ';
//        }
//        cout << endl;
//
//    }
    ll ans = f[1][n] + f[n][1];
    for(int i = 1; i <= m; ++i){
        int u = a[i].v, v = a[i].u;
        ll cur =min(f[1][n], f[1][u] + f[v][n] + a[i].c)+ min(f[n][1], f[n][u] + f[v][1] + a[i].c) + a[i].d;
        if(cur >= ans) continue;
        swap(u, v);
        adj[u].erase(adj[u].find({v, a[i].c}));
        adj[v].insert({u, a[i].c});
        ans = min(ans, dist(1) + dist(n) + a[i].d);
        swap(u, v);
        adj[u].erase(adj[u].find({v, a[i].c}));
        adj[v].insert({u, a[i].c});
    }
    if(ans >= oo / 2) cout << -1;
    else cout << ans;


}
/*
4 5
3 1 3 7
3 2 0 4
1 2 5 1
4 2 4 9
3 4 3 9




*/

Compilation message

ho_t4.cpp:44:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   44 | main(){
      | ^~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 2648 KB Output is correct
2 Correct 7 ms 2652 KB Output is correct
3 Correct 7 ms 2796 KB Output is correct
4 Correct 13 ms 2792 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 10 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 10 ms 2652 KB Output is correct
11 Correct 17 ms 2780 KB Output is correct
12 Correct 8 ms 2652 KB Output is correct
13 Correct 7 ms 2652 KB Output is correct
14 Correct 7 ms 2652 KB Output is correct
15 Correct 7 ms 2652 KB Output is correct
16 Correct 7 ms 2788 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 6788 KB Output is correct
2 Correct 28 ms 6748 KB Output is correct
3 Correct 25 ms 6940 KB Output is correct
4 Correct 13 ms 2648 KB Output is correct
5 Correct 7 ms 2788 KB Output is correct
6 Correct 10 ms 2648 KB Output is correct
7 Correct 7 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 46 ms 6916 KB Output is correct
10 Correct 37 ms 6736 KB Output is correct
11 Correct 28 ms 6796 KB Output is correct
12 Correct 29 ms 6748 KB Output is correct
13 Correct 26 ms 6748 KB Output is correct
14 Correct 28 ms 6748 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 2776 KB Output is correct
2 Correct 7 ms 2724 KB Output is correct
3 Correct 22 ms 5640 KB Output is correct
4 Correct 7 ms 2652 KB Output is correct
5 Correct 26 ms 6712 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 0 ms 2652 KB Output is correct
8 Correct 53 ms 6752 KB Output is correct
9 Correct 65 ms 6748 KB Output is correct
10 Correct 28 ms 6480 KB Output is correct
11 Correct 27 ms 6736 KB Output is correct
12 Correct 27 ms 6736 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 1 ms 2652 KB Output is correct
17 Correct 0 ms 2652 KB Output is correct
18 Correct 0 ms 2652 KB Output is correct
19 Correct 30 ms 6704 KB Output is correct
20 Correct 35 ms 6720 KB Output is correct
21 Correct 29 ms 6748 KB Output is correct
22 Correct 28 ms 6616 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 2648 KB Output is correct
2 Correct 7 ms 2652 KB Output is correct
3 Correct 7 ms 2796 KB Output is correct
4 Correct 13 ms 2792 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 10 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 10 ms 2652 KB Output is correct
11 Correct 17 ms 2780 KB Output is correct
12 Correct 8 ms 2652 KB Output is correct
13 Correct 7 ms 2652 KB Output is correct
14 Correct 7 ms 2652 KB Output is correct
15 Correct 7 ms 2652 KB Output is correct
16 Correct 7 ms 2788 KB Output is correct
17 Correct 25 ms 6788 KB Output is correct
18 Correct 28 ms 6748 KB Output is correct
19 Correct 25 ms 6940 KB Output is correct
20 Correct 13 ms 2648 KB Output is correct
21 Correct 7 ms 2788 KB Output is correct
22 Correct 10 ms 2648 KB Output is correct
23 Correct 7 ms 2652 KB Output is correct
24 Correct 1 ms 2652 KB Output is correct
25 Correct 46 ms 6916 KB Output is correct
26 Correct 37 ms 6736 KB Output is correct
27 Correct 28 ms 6796 KB Output is correct
28 Correct 29 ms 6748 KB Output is correct
29 Correct 26 ms 6748 KB Output is correct
30 Correct 28 ms 6748 KB Output is correct
31 Correct 7 ms 2776 KB Output is correct
32 Correct 7 ms 2724 KB Output is correct
33 Correct 22 ms 5640 KB Output is correct
34 Correct 7 ms 2652 KB Output is correct
35 Correct 26 ms 6712 KB Output is correct
36 Correct 1 ms 2652 KB Output is correct
37 Correct 0 ms 2652 KB Output is correct
38 Correct 53 ms 6752 KB Output is correct
39 Correct 65 ms 6748 KB Output is correct
40 Correct 28 ms 6480 KB Output is correct
41 Correct 27 ms 6736 KB Output is correct
42 Correct 27 ms 6736 KB Output is correct
43 Correct 1 ms 2652 KB Output is correct
44 Correct 1 ms 2652 KB Output is correct
45 Correct 1 ms 2652 KB Output is correct
46 Correct 1 ms 2652 KB Output is correct
47 Correct 0 ms 2652 KB Output is correct
48 Correct 0 ms 2652 KB Output is correct
49 Correct 30 ms 6704 KB Output is correct
50 Correct 35 ms 6720 KB Output is correct
51 Correct 29 ms 6748 KB Output is correct
52 Correct 28 ms 6616 KB Output is correct
53 Correct 29 ms 6700 KB Output is correct
54 Correct 27 ms 6668 KB Output is correct
55 Correct 27 ms 6696 KB Output is correct
56 Correct 7 ms 2652 KB Output is correct
57 Correct 7 ms 2772 KB Output is correct
58 Correct 35 ms 6024 KB Output is correct
59 Correct 31 ms 5976 KB Output is correct
60 Correct 34 ms 5968 KB Output is correct
61 Correct 39 ms 5932 KB Output is correct
62 Correct 167 ms 5928 KB Output is correct
63 Correct 349 ms 6032 KB Output is correct
64 Correct 93 ms 6224 KB Output is correct
65 Correct 205 ms 6268 KB Output is correct
66 Correct 402 ms 6228 KB Output is correct
67 Correct 36 ms 5864 KB Output is correct
68 Correct 48 ms 6748 KB Output is correct
69 Correct 44 ms 6992 KB Output is correct
70 Correct 30 ms 6928 KB Output is correct
71 Correct 32 ms 6736 KB Output is correct
72 Correct 38 ms 6744 KB Output is correct
73 Correct 29 ms 6748 KB Output is correct
74 Correct 31 ms 6856 KB Output is correct