Submission #983544

#	Time	Username	Problem	Language	Result	Execution time	Memory
983544		Abito	Travelling Merchant (APIO17_merchant)	C++17	0 / 100	57 ms	2140 KiB

merchant

#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define ppb pop_back
#define ep insert
#define endl '\n'
#define elif else if
#define pow pwr
#define sqrt sqrtt
#define int long long
#define y1 YONE
typedef unsigned long long ull;
using namespace std;
struct edge{
    int x,y,w;
};
const int N=105,KK=1005;
int n,m,K,dis[N][N],b[N][KK],s[N][KK];
bool vis[N];
pair<int,int> eff[N][N];
vector<pair<int,int>> adj[N];
vector<edge> v;
void dijkstra(int s){
    for (int i=1;i<=n;i++) vis[i]=0,dis[s][i]=-1;
    dis[s][s]=0;
    priority_queue<pair<int,int>> pq;
    pq.push({0,s});
    while (!pq.empty()){
        int x=pq.top().S;
        pq.pop();
        if (vis[x]) continue;
        vis[x]=1;
        for (auto u:adj[x]){
            if (dis[s][u.F]==-1 || dis[s][u.F]>dis[s][x]+u.S){
                dis[s][u.F]=dis[s][x]+u.S;
                pq.push({-dis[s][u.F],u.F});
            }
        }
    }return;
}
int32_t main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
    cin>>n>>m>>K;
    for (int i=1;i<=n;i++) for (int j=1;j<=K;j++) cin>>b[i][j]>>s[i][j];
    for (int i=1;i<=m;i++){
        int x,y,w;
        cin>>x>>y>>w;
        adj[x].pb({y,w});
        v.pb({x,y,w});
    }
    for (int i=1;i<=n;i++) dijkstra(i);
    for (int i=1;i<=n;i++){
        for (int j=1;j<=n;j++){
            if (dis[i][j]==-1) eff[i][j]={-1,-1};
            else{
                int mx=0;
                for (int k=1;k<=K;k++){
                    if (b[i][k]==-1 || s[j][k]==-1) continue;
                    mx=max(mx,s[j][k]-b[i][k]);
                }
                eff[i][j]={mx,dis[i][j]};
            }
            //cout<<eff[i][j].F<<' '<<eff[i][j].S<<"  ";
        }//cout<<endl;
    }
    for (int t=1;t<=50;t++){
    for (int i=1;i<=n;i++){
        for (int j=i;j<=n;j++){
            if (i==j || eff[i][j].F==-1) continue;
            for (int k=1;k<=n;k++){
                if (eff[i][k].F==-1 || eff[k][j].F==-1) continue;
                pair<int,int> x={eff[i][k].F+eff[k][j].S,eff[i][k].S+eff[k][j].S};
                if (eff[i][j].F*x.S<eff[i][j].S*x.F) eff[i][j]=x;
                //cout<<eff[i][j].F<<' '<<eff[i][j].S<<endl;
            }
        }
    }}
    /*for (int i=1;i<=n;i++){
        for (auto u:v){
            if (eff[i][u.x]==-1) continue;
            pair<int,int> x={eff[i][u.x]}
        }
    }*/
    /*for (int t=1;t<=50;t++){
    for (int k=1;k<=n;k++){
        for (int i=1;i<=n;i++){
            if (eff[i][k].F==-1) continue;
            for (int j=1;j<=n;j++){
                if (j==i || eff[k][j].F==-1 || eff[i][j].F==-1) continue;
                pair<int,int> x={eff[i][k].F+eff[k][j].S,eff[i][k].S+eff[k][j].S};
                if (eff[i][j].F*x.S<eff[i][j].S*x.F) eff[i][j]=x;
            }
        }
    }}*/
    int ans=0;
    for (int i=1;i<=n;i++){
        for (int j=1;j<=n;j++){
            if (i==j || dis[i][j]==-1) continue;
            for (int k=1;k<=n;k++){
                if (dis[k][i]==-1 || dis[j][k]==-1) continue;
                ans=max(ans,eff[i][j].F/(eff[i][j].S+dis[k][i]+dis[j][k]));
            }
        }
    }cout<<ans<<endl;
    return 0;
}

• Subtask 1: 0 / 12
• Subtask 2: 0 / 21
• Subtask 3: 0 / 33
• Subtask 4: 0 / 34