This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
const double ll=1e-9;
typedef pair <int,int> pp;
int n,m,k,S[102][1002],B[102][1002];
int c[102][102],d[102][102];
double cost[102][102],s[102];
vector <pp> A[102];
void prepare()
{
for (int i=1;i<=n;i++)
for (int j=1;j<=n;j++)
{
c[i][j]=0;
for (int x=1;x<=k;x++)
if (B[i][x]!=-1&&S[j][x]!=-1) c[i][j]=max(c[i][j],S[j][x]-B[i][x]);
}
for (int x=1;x<=n;x++)
for (int i=1;i<=n;i++)
for (int j=1;j<=n;j++)
d[i][j]=min(d[i][j],d[i][x]+d[x][j]);
//for (int i=1;i<=n;i++)
// for (int j=1;j<=n;j++)
// cout<<i<<' '<<j<<' '<<d[i][j]<<' '<<c[i][j]<<endl;
}
int check(int x)
{
for (int i=1;i<=n;i++)
for (int j=1;j<=n;j++)
if (i!=j) cost[i][j]=(double) x*d[i][j]-c[i][j]-ll;
/* cout<<"cac "<<x<<endl;
for (int i=1;i<=n;i++)
for (int j=1;j<=n;j++)
cout<<i<<' '<<j<<' '<<cost[i][j]<<endl;*/
for (int i=1;i<=n;i++)
s[i]=cost[1][i];
for (int x=1;x<=n;x++)
for (int i=1;i<=n;i++)
for (int j=1;j<=n;j++)
if (s[j]>s[i]+cost[i][j]) s[j]=s[i]+cost[i][j];
for (int i=1;i<=n;i++)
for (int j=1;j<=n;j++)
if (s[j]>s[i]+cost[i][j]) return 1;
return 0;
}
void solve()
{
//cout<<fixed<<setprecision(10)<<ll<<endl;
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<=n;i++)
for (int j=1;j<=n;j++)
if (i!=j) d[i][j]=1e9;
for (int i=1;i<=m;i++)
{
int a,b,c;cin>>a>>b>>c;
A[a].push_back({b,c});
d[a][b]=min(d[a][b],c);
}
prepare();
int d=0;int c=1e9;
int res=0;
while (d<=c)
{
int mid=(d+c)/2;
if (check(mid)) {res=mid;d=mid+1;}
else c=mid-1;
}
cout<<res;
}
int main()
{
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
//freopen("merchant.inp","r",stdin);
//freopen("merchant.out","w",stdout);
solve();
}
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