Submission #200374

#	Time	Username	Problem	Language	Result	Execution time	Memory
200374		Nordway	Travelling Merchant (APIO17_merchant)	C++14	0 / 100	29 ms	2168 KiB

merchant

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define x first
#define y second
#define pb push_back
#define mp make_pair
#define all(v) v.begin(),v.end()
#define sz(v) (int)v.size()
#define up_b upper_bound
#define low_b lower_bound
#define nl '\n'

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef long double ld;

typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>ordered_set;

template<class T,int SZ> struct BIT{
  T t[SZ];
  void upd(int x,T y){
    for(int i=x;i<SZ;i=(i|(i+1))){
      t[i]+=y;
    }
  }
  T pref(int x){
    T res=0;
    for(int i=x;i>=0;i=(i&(i+1))-1){
      res+=t[i];
    }
    return res;
  }
  T get(int l,int r){
    return pref(r)-pref(l-1);
  }
};
template<class T,int SZ> struct ST{
  T t[4*SZ];
  void build(T a[],int v,int tl,int tr){
    if(tl==tr){
      t[v]=a[tl];
      return ;
    }
    int tm=(tl+tr)/2;
    build(a,v*2,tl,tm);
    build(a,v*2+1,tm+1,tr);
    t[v]=t[v*2]+t[v*2+1];
  }
  void upd(int v,int tl,int tr,int pos,T val){
    if(tl==tr){
      t[v]+=val;
      return ;
    }
    int tm=(tl+tr)/2;
    if(pos<=tm)upd(v*2,tl,tm,pos,val);
    else upd(v*2+1,tm+1,tr,pos,val);
    t[v]=t[v*2]+t[v*2+1];
  }
  T get(int v,int tl,int tr,int l,int r){
    if(tl>r||l>tr)return 0;
    if(l<=tl&&tr<=r)return t[v];
    int tm=(tl+tr)/2;
    return get(v*2,tl,tm,l,r)+get(v*2+1,tm+1,tr,l,r);
  }
};

const int N=111;
const int K=1e3+11;
const int W=1e3+11;
const int inf=INT_MAX;
const ll INF=1e18;
const ll mod=1e9+7;
const ld EPS=1e-9;
const int dx[4]={0,0,1,-1};
const int dy[4]={1,-1,0,0};

vector<pair<int,int>>g[N];
int b[N][K],s[N][K];
int d[N];

int main(){
  ios_base::sync_with_stdio(0);
  cin.tie(0),cout.tie(0);
  int n,m,k;
  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,w;
    cin>>u>>v>>w;
    g[u].pb(mp(v,w));
    g[v].pb(mp(u,w));
  }
  set<pair<int,int>>q;
  q.insert(mp(0,1));
  d[1]=0;
  while(!q.empty()){
    pair<int,int>p=*q.begin();
    q.erase(p);
    int v=p.y;
    for(int i=0;i<sz(g[v]);i++){
      int to=g[v][i].x;
      if(d[to]>d[v]+g[v][i].y){
        q.erase(mp(d[to],to));
        d[to]=d[v]+g[v][i].y;
        q.insert(mp(d[to],to));
      }
    }
  }
  int ans=0;
  for(int i=2;i<=n;i++){
    for(int j=1;j<=k;j++){
      if(b[1][j]==-1)continue;
      if(s[i][j]==-1)continue;
      int cost=s[i][j]-b[1][j];
      if(cost<=0)continue;
      ans=max(ans,cost/(2*d[i]));
    }
  }
  cout<<ans;
}

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