Submission #905020

#	Time	Username	Problem	Language	Result	Execution time	Memory
905020		vjudge1	Travelling Merchant (APIO17_merchant)	C++17	100 / 100	75 ms	2284 KiB

merchant

#include <bits/stdc++.h>

#pragma optimize("03")
#pragma target("avx2")

using namespace std;

#define ll long long
#define ld long double
#define pb push_back
#define pf push_front
#define pii pair<int,int>
#define all(v) v.begin(),v.end()
#define F first
#define S second
#define mem(a,i) memset(a,i,sizeof(a))
#define sz(s) (int)s.size()
#define y1 yy
#define ppb pop_back
#define lb lower_bound
#define ub upper_bound
#define gcd(a,b) __gcd(a,b)
#define in insert
#define int ll

const int MAX=1005;
const int B=104;
const int N=104;
const int block=450;
const int maxB=MAX/B+10;
const ll inf=1e18;  
const int mod=1e9+7;
const int mod1=1e9+9;
const int logg=15;

int dx[8]={1,0,-1,0,1,-1,-1,1};
int dy[8]={0,1,0,-1,1,-1,1,-1};

int binpow(int a,int n){
  if(!n)return 1;
  if(n%2==1)return a*binpow(a,n-1)%mod;
  int k=binpow(a,n/2);
  return k*k%mod;
}

int n,m,k;
int d[N][N],cost[N][N];
int b[N][MAX],s[N][MAX];
int d1[N][N];

bool check(int x){
  for(int i=1;i<=n;i++){
    for(int j=1;j<=n;j++){
      d1[i][j]=inf;
    }
  }
  for(int i=1;i<=n;i++){
    for(int j=1;j<=n;j++){
      if(d[i][j]==inf)continue;
      d1[i][j]=min(d1[i][j],-(cost[i][j]-x*d[i][j]));
    }
  }
  for(int k=1;k<=n;k++){
    for(int i=1;i<=n;i++){
      for(int j=1;j<=n;j++){
        d1[i][j]=min(d1[i][j],d1[i][k]+d1[k][j]);
      }
    }
  }
  int ans=inf;
  for(int i=1;i<=n;i++)ans=min(ans,d1[i][i]);
  // cout<<ans<<"\n";
  return (ans<=0);
}

signed main(){
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  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++)d[i][j]=inf;
  }
  for(int i=1;i<=m;i++){
    int x,y,w;
    cin>>x>>y>>w;
    d[x][y]=w;
  }
  for(int k=1;k<=n;k++){
    for(int i=1;i<=n;i++){
      for(int j=1;j<=n;j++){
        d[i][j]=min(d[i][j],d[i][k]+d[k][j]);
      }
    }
  }
  for(int i=1;i<=n;i++){
    for(int j=1;j<=n;j++){
      for(int f=1;f<=k;f++){
        if(s[j][f]==-1||b[i][f]==-1)continue;
        cost[i][j]=max(s[j][f]-b[i][f],cost[i][j]);
      }
      // cout<<i<<" "<<j<<" "<<cost[i][j]<<"\n";
    }
  }
  // cout<<d[2][4]<<"\n";
  // check(1e9);
  int l=0,r=1e9,res=-1;
  while(l<=r){
    int m=(l+r)/2;
    if(check(m)){
      l=m+1;
      res=m;
    }
    else r=m-1;
  }
  // cout<<check(2)<<"\n";
  cout<<res<<"\n";
}

Compilation message (stderr)

merchant.cpp:3: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    3 | #pragma optimize("03")
      | 
merchant.cpp:4: warning: ignoring '#pragma target ' [-Wunknown-pragmas]
    4 | #pragma target("avx2")
      |

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