oj.uz

Submission #924458

# Submission time Handle Problem Language Result Execution time Memory
924458 2024-02-09T04:39:56 Z yeediot Olympic Bus (JOI20_ho_t4) C++14
0 / 100
 19 ms 4816 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
#define sz(x) (int)(x.size())
#define all(x) x.begin(),x.end()
#define F first
#define S second
#define pb push_back
#ifdef local
void setio(){freopen("/Users/iantsai/Library/Mobile Documents/com~apple~CloudDocs/cpp/Empty.md","r",stdin);}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
struct edge{
    int a,b,c,d;
};
const int mxn=405;
vector<edge>e;
vector<pii>adj[mxn],radj[mxn];
int dij(int st,int ed){
    vector<int>dis(mxn);
    for(int i=0;i<mxn;i++)dis[i]=1e18;
    dis[st]=0;
    priority_queue<pii,vector<pii>,greater<pii>>pq;
    pq.push({0,st});
    while(sz(pq)){
        auto [d,v]=pq.top();
        pq.pop();
        if(dis[v]<d)continue;
        //cout<<v<<' ';
        for(auto [u,dd]:adj[v]){
            if(dis[v]+dd<dis[u]){
                dis[u]=dis[v]+dd;
                pq.push({dis[u],u});
            }
        }
    }
    //for(int i=1;i<=8;i++)cout<<dis[i]<<' ';
        //cout<<'\n';
    return dis[ed];
}
int rdij(int st,int ed){
    vector<int>dis(mxn);
    for(int i=0;i<mxn;i++)dis[i]=1e18;
    dis[st]=0;
    priority_queue<pii,vector<pii>,greater<pii>>pq;
    pq.push({0,st});
    while(sz(pq)){
        auto [d,v]=pq.top();
        pq.pop();
        if(dis[v]<d)continue;
        //cout<<v<<' ';
        for(auto [u,dd]:radj[v]){
            if(dis[v]+dd<dis[u]){
                dis[u]=dis[v]+dd;
                pq.push({dis[u],u});
            }
        }
    }
    //for(int i=1;i<=8;i++)cout<<dis[i]<<' ';
        //cout<<'\n';
    return dis[ed];
}
signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    setio();
    int n,m;
    cin>>n>>m;
    for(int i=0;i<m;i+=2){
        int a,b,c,d;
        cin>>a>>b>>c>>d;
        int d2;
        cin>>a>>b>>c>>d2;
        d=min(d,d2);
        e.pb({a,b,c,d});
        adj[a].pb({b,c});
        adj[b].pb({a+n,d+c});
        adj[a+n].pb({b+n,c});
        //adj[a].pb({b,c});
        radj[b+n].pb({a,d+c});
        //radj[a+n].pb({b,c});
        radj[a+n].pb({b+n,c});
        radj[a].pb({b,c});
    }
    int ans=dij(n+1,n+n)+rdij(n,1);
    //cout<<ans<<'\n';
    ans=min(ans,dij(1,2*n)+rdij(n,1));
    //cout<<ans<<'\n';
    ans=min(ans,rdij(2*n,1)+dij(1,n));
    //ans=min(ans,dij(1,2*n)+dij(2*n,1));
    if(ans>=1e9){
        cout<<-1<<'\n';
        return 0;
    }
    cout<<ans<<'\n';
}
/*
*/

Compilation message

ho_t4.cpp: In function 'long long int dij(long long int, long long int)':
ho_t4.cpp:30:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   30 |         auto [d,v]=pq.top();
      |              ^
ho_t4.cpp:34:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   34 |         for(auto [u,dd]:adj[v]){
      |                  ^
ho_t4.cpp: In function 'long long int rdij(long long int, long long int)':
ho_t4.cpp:52:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   52 |         auto [d,v]=pq.top();
      |              ^
ho_t4.cpp:56:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   56 |         for(auto [u,dd]:radj[v]){
      |                  ^

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 4816 KB Output is correct
2 Correct 15 ms 4816 KB Output is correct
3 Correct 17 ms 4816 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Incorrect 17 ms 4812 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 600 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 63.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -