Submission #1113862

#	Time	Username	Problem	Language	Result	Execution time	Memory
1113862		adkjt	Travelling Merchant (APIO17_merchant)	C++14	0 / 100	77 ms	2640 KiB

merchant

#include<bits/stdc++.h>
using namespace std;
#define pii pair<long long,long long>
#define f first
#define s second
#define ll long long
//vector<pii> g[111];
ll dis[111][111],a[111][111],f[111][111];
ll buy[111][1111],sell[111][1111];

int main()
{
    int n,m,k;
    cin>>n>>m>>k;
    for(int i=1; i<=n; i++)
    {
        for(int j=1; j<=k; j++)
            cin>>buy[i][j]>>sell[i][j];
        for(int j=1; j<=n; j++) dis[i][j]=1000000000000000;
    }
    for(int i=1; i<=m; i++)
    {
        int u,v,w;
        cin>>u>>v>>w;
        dis[u][v]=w;
    }
    for(int K=1; K<=n; K++)
    {
        for(int i=1; i<=n; i++)
        {
            for(int j=1; j<=n; j++)
            {
                dis[i][j]=min(dis[i][j],dis[i][K]+dis[K][j]);

            }

        }
    }
    for(int i=1; i<=n; i++)
        for(int K=1; K<=n; K++)
            for(int j=1; j<=k; j++)
            {
                if(buy[i][j]!=-1&&sell[K][j]!=-1)
                    a[i][K]=max(a[i][K],sell[K][j]-buy[i][j]);
            }
    ll l=0,r=1e9,ans=0;

    while(l<r)
    {
        ll mid=(l+r)/2;
        for(int i=1; i<=n; i++)
        {
            for(int j=1; j<=n; j++)
                f[i][j]=min((ll)1000000000000000,mid*dis[i][j])-a[i][j];
        }
        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]);

                }
            }
        }
        bool ch=0;
        for(int i=1; i<=n; i++)
        {
            if(f[i][i]<=0)
            {
                ch=1;
            }

        }
        if(ch)
            ans=mid,l=mid+1;
        else
            r=mid-1;

    }
    cout<<ans;
}

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