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;
#define INIT ios_base :: sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define mp make_pair
#define pb push_back
#define ft first
#define sc second
#define ll long long
#define pii pair<int, int>
#define count_bits __builtin_popcount
#define int ll
int t, n, m, k, a[300010], q, l, r;
int b[101][1001], s[101][1001];
int c[101][101];
int d[101][101];
int p[101][101];
vector<pii> g[101];
void dijkstra(int s){
multiset<pii> ms;
ms.insert({0, s});
d[s][s]=0;
bool v[101]; memset(v, 0, sizeof(v));
while(!ms.empty()){
int nod=(ms.begin())->sc; ms.erase(ms.begin());
v[nod]=true;
for(pii pr:g[nod]){
int u=pr.ft, c=pr.sc;
if(v[u]){continue;}
auto it=ms.find({d[s][u], u});
if(it==ms.end()){
d[s][u]=d[s][nod]+c;
ms.insert({d[s][u], u});
}
else{
if(d[s][u]>(d[s][nod]+c) ){
ms.erase(it);
d[s][u]=d[s][nod]+c;
ms.insert({d[s][u], u});
}
}
}
}
}
int g1[101][101];
int inf=(1e18)*4;
void build(int r){
for(int i=1; i<=n; i++){
for(int j=1; j<=n; j++){
g1[i][j]=inf;
}
}
for(int i=1; i<=n; i++){
g1[i][i]=0;
}
for(int i=1; i<=n; i++){
for(int j=1; j<=n;j++){
if(c[i][j]>0){
if( (c[i][j]>d[i][j]) && (d[i][j]>0) ){c[i][j]=min(d[i][j], c[i][j]);}
g1[i][j]=r*c[i][j]-p[i][j];
}
}
}
}
vector<int> g2[101];
int v2[101];
bool dfs(int s){
v2[s]=1;
bool b=false;
for(int u:g2[s]){
if(v2[u]==1){ v2[s]=-1; return true;}
if(v2[u]==-1){continue;}
b=(b||dfs(u));
}
v2[s]=-1;
return b;
}
bool BellmanFord(int r){
build(r);
for(int k=1; k<=n; k++){
for(int i=1; i<=n; i++){
for(int j=1; j<=n; j++){
g1[i][j]=min(g1[i][j], g1[i][k]+g1[k][j]);
}
}
}
bool exists=false;
for(int i=1; i<=n; i++){
for(int j=1; j<=n; j++){
if(j!=i){
if( (g1[i][j]+g1[j][i])<=g1[i][i] ){
exists=true;
}
}
}
}
return exists;
}
int32_t main(){
INIT
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 u, v, C;
cin>>u>>v>>C;
c[u][v]=C;
g[u].pb({v, C});
}
for(int i=1;i<=n; i++){
dijkstra(i);
}
for(int i=1; i<=n; i++){
for(int j=1; j<=n; j++){
//p[i][j]=-1;
if(c[i][j]>0){
for(int l=1; l<=k; l++){
if( (s[j][l]>=0) && (b[i][l]>=0) ){
p[i][j]=max(p[i][j], s[j][l]-b[i][l]);
}
}
}
}
}
int l=1, r=1000000001, m=(l+r)>>1ll;
while(l<r){
m=(l+r)>>1ll;
if(BellmanFord(m)){
l=m+1;
}
else{
r=m;
}
m=(l+r)>>1ll;
}
cout<<(m-1);
//cout<<BellmanFord(m)<<"\n";
return 0;
}
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