Submission #487954

#	Time	Username	Problem	Language	Result	Execution time	Memory
487954		Mahdi	Travelling Merchant (APIO17_merchant)	C++17	Compilation error	0 ms	0 KiB

merchant

#include<bits/stdc++.h>
#pragma GCC optimize ("Ofast")
using namespace std;
#define all(v) v.begin(), v.end()
#define pii pair<int, int>
#define pil pair<int, ll>
#define pll pair<ll, ll>
#define F first
#define S second
typedef long long ll;
const int N=105, K=1e3+5;
int n, m, k, b[N][K], s[N][K], dis[N][N], a[N][N];
bool c[N][N];
ll d[N][N];

bool ok(ll x){
    for(int i=0;i<n;++i){
        for(int j=0;j<n;++j)
            ds[i][j]=d[i][j]=-x*dis[i][j]+a[i][j];
    }
    for(int o=0;o<n;++o){
        for(int i=0;i<n;++i){
            for(int j=0;j<n;++j){
                if(c[i][o] && c[o][j])
                    d[i][j]=max(d[i][j], d[i][o]+d[o][j]);
            }
        }
        for(int i=0;i<n;++i){
            if(d[i][i]>0)
                return 1;
        }
    }
    for(int i=0;i<n;++i){
        for(int j=i+1;j<n;++j){
            if(c[i][j] && c[j][i] && d[i][j]+d[j][i]>=0)
                return 1;
        }
    }
    return 0;
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin>>n>>m>>k;
    for(int i=0;i<n;++i){
        for(int j=0;j<k;++j)
            cin>>b[i][j]>>s[i][j];
    }
    for(int i=0;i<n;++i){
        fill(dis[i], dis[i]+n, 1e9+5);
        dis[i][i]=0;
    }
    int u, v, w;
    for(int i=0;i<m;++i){
        cin>>u>>v>>w;
        dis[--u][--v]=w;
    }
    for(int o=0;o<n;++o){
        for(int i=0;i<n;++i){
            for(int j=0;j<n;++j)
                dis[i][j]=min(dis[i][j], dis[i][o]+dis[o][j]);
        }
    }
    for(int i=0;i<n;++i){
        for(int j=0;j<n;++j){
            if(dis[i][j]==5+1e9)
                dis[i][j]=0;
            else
                c[i][j]=1;
        }
    }
    for(int i=0;i<n;++i){
        for(int j=0;j<n;++j){
            for(int o=0;o<k;++o){
                if(b[i][o]!=-1 && s[j][o]!=-1)
                    a[i][j]=max(a[i][j], s[j][o]-b[i][o]);
            }
        }
    }
    int l=0, r=1e9;
    while(l<r-1){
        int mid=(l+r)/2;
        if(ok(mid))
            l=mid;
        else
            r=mid;
    }
    cout<<l;
}

Compilation message (stderr)

merchant.cpp: In function 'bool ok(ll)':
merchant.cpp:19:13: error: 'ds' was not declared in this scope; did you mean 'd'?
   19 |             ds[i][j]=d[i][j]=-x*dis[i][j]+a[i][j];
      |             ^~
      |             d