oj.uz

Submission #896482

# Submission time Handle Problem Language Result Execution time Memory
896482 2024-01-01T14:23:02 Z Unforgettablepl Olympic Bus (JOI20_ho_t4) C++17
100 / 100
 406 ms 5840 KB 
#pragma GCC optimize "Ofast"
//#pragma GCC optimize("unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
/*
ID: samikgo1
TASK:
LANG: C++
*/
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef complex<ll> point;
#define X real()
#define Y imag()
#define all(x) x.begin(),x.end()
#define allr(x) x.rbegin(),x.rend()
//#define f first
//#define s second
//#define x first
//#define y second
const ll INF = 1e17;
const ll sqrtn = 440;
const ll modulo = 1e9+7;
const ll siz = 262144;
const ll hashp = 923981238;
const ll hashm = 932439994;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//using namespace __gnu_pbds;
//#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>

#define int ll

struct edge{
    int u,v,c,d;
};

edge edgelist[50001];
set<int> adj[201];
int dist[201][201];
int distd[201];
bool visited[201];
int n;

inline int dijkastra(){
    priority_queue<pair<int,int>,vector<pair<int,int>>,greater<>> q;
    for(int&i:distd)i=INF;
    for(bool&i:visited)i=false;
    int c1 = INF;
    q.emplace(0,1);
    while(!q.empty()){
        auto curr = q.top();q.pop();
        if(visited[curr.second])continue;
        if(curr.second==n){c1=curr.first;break;}
        visited[curr.second]=true;
        for(auto&i:adj[curr.second])if(distd[edgelist[i].v]>edgelist[i].c+curr.first) {
            distd[edgelist[i].v]=edgelist[i].c+curr.first;
            q.emplace(edgelist[i].c + curr.first, edgelist[i].v);
        }
    }
    while(!q.empty())q.pop();
    for(int&i:distd)i=INF;
    for(bool&i:visited)i=false;
    int c2 = INF;
    q.emplace(0,n);
    while(!q.empty()){
        auto curr = q.top();q.pop();
        if(visited[curr.second])continue;
        if(curr.second==1){c2=curr.first;break;}
        visited[curr.second]=true;
        for(auto&i:adj[curr.second])if(distd[edgelist[i].v]>edgelist[i].c+curr.first) {
            distd[edgelist[i].v]=edgelist[i].c+curr.first;
            q.emplace(edgelist[i].c + curr.first, edgelist[i].v);
        }
    }
    return c1+c2;
}

void solve() {
    int m;
    cin >> n >> m;
    for(int i=1;i<=n;i++)for(int j=1;j<=n;j++)if(i!=j)dist[i][j]=INF;
    for(int i=1;i<=m;i++){
        cin >> edgelist[i].u >> edgelist[i].v >> edgelist[i].c >> edgelist[i].d;
        adj[edgelist[i].u].insert(i);
        dist[edgelist[i].u][edgelist[i].v] = min(dist[edgelist[i].u][edgelist[i].v],edgelist[i].c);
    }
    for(int k=1;k<=n;k++){
        for(int i=1;i<=n;i++){
            for(int j=1;j<=n;j++){
                dist[i][j] = min(dist[i][j],dist[i][k]+dist[k][j]);
            }
        }
    }
    int ans = dist[1][n]+dist[n][1];
    for(int i=1;i<=m;i++){
        auto curr = edgelist[i];
        if(min(dist[1][n],dist[1][curr.v]+dist[curr.u][n]+curr.c)+min(dist[n][1],dist[n][curr.v]+dist[curr.u][1]+curr.c)+curr.d<ans){
            adj[curr.u].erase(i);
            adj[curr.v].insert(i);
            swap(edgelist[i].u,edgelist[i].v);
            ans = min(ans,dijkastra()+curr.d);
            adj[curr.v].erase(i);
            adj[curr.u].insert(i);
            swap(edgelist[i].u,edgelist[i].v);
        }
    }
    cout << (ans>=INF ? -1 : ans)<< '\n';
}

int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
//    freopen("mock.txt","r",stdin);
//    freopen(".out","w",stdout);
//    int t;
//    cin >> t;
//    while(t--)
    solve();
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 860 KB Output is correct
2 Correct 8 ms 604 KB Output is correct
3 Correct 8 ms 1112 KB Output is correct
4 Correct 8 ms 880 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 8 ms 604 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 11 ms 876 KB Output is correct
11 Correct 22 ms 860 KB Output is correct
12 Correct 9 ms 820 KB Output is correct
13 Correct 8 ms 860 KB Output is correct
14 Correct 8 ms 860 KB Output is correct
15 Correct 8 ms 860 KB Output is correct
16 Correct 8 ms 860 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 4700 KB Output is correct
2 Correct 27 ms 4700 KB Output is correct
3 Correct 26 ms 4700 KB Output is correct
4 Correct 8 ms 860 KB Output is correct
5 Correct 8 ms 860 KB Output is correct
6 Correct 8 ms 604 KB Output is correct
7 Correct 8 ms 604 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 38 ms 4700 KB Output is correct
10 Correct 30 ms 4700 KB Output is correct
11 Correct 27 ms 4688 KB Output is correct
12 Correct 27 ms 4568 KB Output is correct
13 Correct 27 ms 4700 KB Output is correct
14 Correct 27 ms 4700 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 860 KB Output is correct
2 Correct 8 ms 816 KB Output is correct
3 Correct 23 ms 3676 KB Output is correct
4 Correct 8 ms 604 KB Output is correct
5 Correct 25 ms 4536 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 37 ms 4684 KB Output is correct
9 Correct 42 ms 4700 KB Output is correct
10 Correct 28 ms 4560 KB Output is correct
11 Correct 29 ms 4960 KB Output is correct
12 Correct 26 ms 4696 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 27 ms 4696 KB Output is correct
20 Correct 28 ms 4700 KB Output is correct
21 Correct 31 ms 4700 KB Output is correct
22 Correct 30 ms 4696 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 860 KB Output is correct
2 Correct 8 ms 604 KB Output is correct
3 Correct 8 ms 1112 KB Output is correct
4 Correct 8 ms 880 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 8 ms 604 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 11 ms 876 KB Output is correct
11 Correct 22 ms 860 KB Output is correct
12 Correct 9 ms 820 KB Output is correct
13 Correct 8 ms 860 KB Output is correct
14 Correct 8 ms 860 KB Output is correct
15 Correct 8 ms 860 KB Output is correct
16 Correct 8 ms 860 KB Output is correct
17 Correct 26 ms 4700 KB Output is correct
18 Correct 27 ms 4700 KB Output is correct
19 Correct 26 ms 4700 KB Output is correct
20 Correct 8 ms 860 KB Output is correct
21 Correct 8 ms 860 KB Output is correct
22 Correct 8 ms 604 KB Output is correct
23 Correct 8 ms 604 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 38 ms 4700 KB Output is correct
26 Correct 30 ms 4700 KB Output is correct
27 Correct 27 ms 4688 KB Output is correct
28 Correct 27 ms 4568 KB Output is correct
29 Correct 27 ms 4700 KB Output is correct
30 Correct 27 ms 4700 KB Output is correct
31 Correct 8 ms 860 KB Output is correct
32 Correct 8 ms 816 KB Output is correct
33 Correct 23 ms 3676 KB Output is correct
34 Correct 8 ms 604 KB Output is correct
35 Correct 25 ms 4536 KB Output is correct
36 Correct 1 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 37 ms 4684 KB Output is correct
39 Correct 42 ms 4700 KB Output is correct
40 Correct 28 ms 4560 KB Output is correct
41 Correct 29 ms 4960 KB Output is correct
42 Correct 26 ms 4696 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 0 ms 348 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 27 ms 4696 KB Output is correct
50 Correct 28 ms 4700 KB Output is correct
51 Correct 31 ms 4700 KB Output is correct
52 Correct 30 ms 4696 KB Output is correct
53 Correct 26 ms 4444 KB Output is correct
54 Correct 26 ms 4700 KB Output is correct
55 Correct 27 ms 4496 KB Output is correct
56 Correct 8 ms 1112 KB Output is correct
57 Correct 8 ms 872 KB Output is correct
58 Correct 30 ms 3932 KB Output is correct
59 Correct 30 ms 4856 KB Output is correct
60 Correct 33 ms 4700 KB Output is correct
61 Correct 32 ms 4700 KB Output is correct
62 Correct 145 ms 4696 KB Output is correct
63 Correct 299 ms 4748 KB Output is correct
64 Correct 83 ms 5160 KB Output is correct
65 Correct 213 ms 5148 KB Output is correct
66 Correct 406 ms 5596 KB Output is correct
67 Correct 17 ms 4276 KB Output is correct
68 Correct 40 ms 5720 KB Output is correct
69 Correct 34 ms 5716 KB Output is correct
70 Correct 29 ms 5724 KB Output is correct
71 Correct 31 ms 5744 KB Output is correct
72 Correct 28 ms 5724 KB Output is correct
73 Correct 29 ms 5724 KB Output is correct
74 Correct 38 ms 5840 KB Output is correct