oj.uz

Submission #922326

# Submission time Handle Problem Language Result Execution time Memory
922326 2024-02-05T12:11:52 Z GrindMachine Olympic Bus (JOI20_ho_t4) C++17
5 / 100
 1000 ms 6492 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a,b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a,b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 200 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

vector<array<ll,3>> adj[N];

void solve(int test_case)
{
    ll n,m; cin >> n >> m;
    vector<array<ll,4>> edges(m+5);

    rep1(i,m){
        ll u,v,w,d; cin >> u >> v >> w >> d;
        adj[u].pb({v,w,i}), adj[v].pb({u,w,i});
        edges[i] = {u,v,w,d};
    }

    auto dijkstra = [&](ll s, ll flipped){
        vector<ll> dis(n+5,inf2);
        vector<bool> vis(n+5);
        dis[s] = 0;

        rep1(iter,n){
            pll best = {inf2,inf2};
            rep1(u,n){
                if(vis[u]) conts;
                pll px = {dis[u],u};
                amin(best,px);
            }

            ll u = best.ss;
            vis[u] = 1;

            for(auto [v,w,id] : adj[u]){
                if(id != flipped){
                    if(edges[id][0] == u){
                        amin(dis[v],dis[u]+w);
                    }
                }
                else{
                    if(edges[id][0] == v){
                        amin(dis[v],dis[u]+w);
                    }
                }
            }
        }

        return dis;
    };

    ll ans = inf2;
    amin(ans,dijkstra(1,-1)[n]+dijkstra(n,-1)[1]);

    rep1(i,m){
        ll cost = edges[i][3]+dijkstra(1,i)[n]+dijkstra(n,i)[1];
        amin(ans,cost);
    }

    if(ans == inf2) ans = -1;
    cout << ans << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 170 ms 344 KB Output is correct
2 Correct 28 ms 348 KB Output is correct
3 Correct 214 ms 576 KB Output is correct
4 Correct 205 ms 348 KB Output is correct
5 Correct 12 ms 600 KB Output is correct
6 Correct 35 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 9 ms 348 KB Output is correct
10 Correct 209 ms 348 KB Output is correct
11 Correct 213 ms 348 KB Output is correct
12 Correct 228 ms 348 KB Output is correct
13 Correct 184 ms 576 KB Output is correct
14 Correct 192 ms 600 KB Output is correct
15 Correct 193 ms 600 KB Output is correct
16 Correct 188 ms 576 KB Output is correct

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1008 ms 6492 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 166 ms 348 KB Output is correct
2 Correct 31 ms 348 KB Output is correct
3 Execution timed out 1045 ms 4952 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 170 ms 344 KB Output is correct
2 Correct 28 ms 348 KB Output is correct
3 Correct 214 ms 576 KB Output is correct
4 Correct 205 ms 348 KB Output is correct
5 Correct 12 ms 600 KB Output is correct
6 Correct 35 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 9 ms 348 KB Output is correct
10 Correct 209 ms 348 KB Output is correct
11 Correct 213 ms 348 KB Output is correct
12 Correct 228 ms 348 KB Output is correct
13 Correct 184 ms 576 KB Output is correct
14 Correct 192 ms 600 KB Output is correct
15 Correct 193 ms 600 KB Output is correct
16 Correct 188 ms 576 KB Output is correct
17 Execution timed out 1008 ms 6492 KB Time limit exceeded
18 Halted 0 ms 0 KB -