| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 244888 | rrrr10000 | Travelling Merchant (APIO17_merchant) | C++14 | 0 ms | 0 KiB |
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 rep(i, n) for(long long i=0;i<(long long)(n);i++)
#define REP(i,k,n) for(long long i=k;i<(long long)(n);i++)
#define all(a) a.begin(),a.end()
#define pb emplace_back
#define eb emplace_back
#define lb(v,k) (lower_bound(all(v),k)-v.begin())
#define ub(v,k) (upper_bound(all(v),k)-v.begin())
#define fi first
#define se second
#define pi M_PI
#define PQ(T) priority_queue<T>
#define SPQ(T) priority_queue<T,vector<T>,greater<T>>
#define dame(a) {out(a);return 0;}
#define decimal cout<<fixed<<setprecision(15);
#define dupli(a) a.erase(unique(all(a)),a.end())
typedef long long ll;
typedef pair<ll,ll> P;
typedef tuple<ll,ll,ll> PP;
typedef tuple<ll,ll,ll,ll> PPP;
typedef multiset<ll> S;
using vi=vector<ll>;
using vvi=vector<vi>;
using vvvi=vector<vvi>;
using vvvvi=vector<vvvi>;
using vp=vector<P>;
using vvp=vector<vp>;
using vb=vector<bool>;
using vvb=vector<vb>;
const ll inf=1001001001001001001;
const ll INF=1001001001;
const ll mod=1000000007;
const double eps=1e-10;
template<class T> bool chmin(T&a,T b){if(a>b){a=b;return true;}return false;}
template<class T> bool chmax(T&a,T b){if(a<b){a=b;return true;}return false;}
template<class T> void out(T a){cout<<a<<'\n';}
template<class T> void outp(T a){cout<<'('<<a.fi<<','<<a.se<<')'<<'\n';}
template<class T> void outvp(T v){rep(i,v.size())cout<<'('<<v[i].fi<<','<<v[i].se<<')';cout<<'\n';}
template<class T> void outvvp(T v){rep(i,v.size())outvp(v[i]);}
template<class T> void outv(T v){rep(i,v.size()){if(i)cout<<' ';cout<<v[i];}cout<<'\n';}
template<class T> void outvv(T v){rep(i,v.size())outv(v[i]);}
template<class T> bool isin(T x,T l,T r){return (l)<=(x)&&(x)<=(r);}
template<class T> void yesno(T b){if(b)out("yes");else out("no");}
template<class T> void YesNo(T b){if(b)out("Yes");else out("No");}
template<class T> void YESNO(T b){if(b)out("YES");else out("NO");}
template<class T> void noyes(T b){if(b)out("no");else out("yes");}
template<class T> void NoYes(T b){if(b)out("No");else out("Yes");}
template<class T> void NOYES(T b){if(b)out("NO");else out("YES");}
void outs(ll a,ll b){if(a>=inf-100)out(b);else out(a);}
ll gcd(ll a,ll b){if(b==0)return a;return gcd(b,a%b);}
ll modpow(ll a,ll b){ll res=1;a%=mod;while(b){if(b&1)res=res*a%mod;a=a*a%mod;b>>=1;}return res;}
ll nl(long double a){return ((ll)(a*2)+1)/2;}
int main(){
ll n,m,k;cin>>n>>m>>k;
vvi v(n,vi(k*2));
rep(i,n)rep(j,k*2)cin>>v[i][j];
vvi val(n,vi(n));
rep(i,n)rep(j,n){
rep(t,k)if(v[j][t*2+1]!=-1&&v[i][t*2]!=-1)chmax(val[i][j],v[j][t*2+1]-v[i][t*2]);
}
vvi dis(n,vi(n,inf));
rep(i,n)dis[i][i]=0;
rep(i,m){
ll a,b;cin>>a>>b;a--;b--;
cin>>dis[a][b];
}
rep(i,n)rep(j,n)rep(k,n)chmin(dis[j][k],dis[j][i]+dis[i][k]);
// outvv(dis);outvv(val);
long double ok=0,ng=1000000005;
while(ng-ok>0.01){
long double md=(ok+ng)/2;
bool able=false;
vector<long double> dp(n);
vector<vector<long double>> f(n,vi(n,-inf));
rep(i,n)rep(j,n)chmax(f[i][j],val[i][j]-md*dis[i][j]);
bool dif=true;
int step=0;
while(dif){
dif=false;
rep(i,n)rep(j,n)if(f[i][j]!=-inf)if(chmax(dp[j],dp[i]+f[i][j]))dif=true;
step++;
if(step>n+5){
able=true;break;
}
}
if(able)ok=md;
else ng=md;
}
out(nl(ok));
}