Submission #643001

#TimeUsernameProblemLanguageResultExecution timeMemory
643001christinelynnTravelling Merchant (APIO17_merchant)C++17
12 / 100
21 ms2380 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<ll, ll> pll; typedef pair<int, int> pii; typedef vector<int> vi; typedef vector<ll> vll; const ll mod=1e9+7; const ll maxn=1e6+5; const int INF=1e9+5; #define ok ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); #define fi first #define se second #define pb push_back #define ub upper_bound #define lb lower_bound #define endl '\n' int n, m, k, u, v, w, dis[105][105], ans; pii item[105][1005]; vector<pii> adj[105]; bool bs=1; int main() { ok cin >> n >> m >> k; for(int i=1; i<=n; i++) { for(int j=1; j<=k; j++) cin >> item[i][j].fi >> item[i][j].se; } for(int i=1; i<=n; i++) { for(int j=1; j<=n; j++) dis[i][j]=INF; dis[i][i]=0; } for(int i=0; i<m; i++) { cin >> u >> v >> w; adj[u].pb({v, w}); dis[u][v]=min(dis[u][v], w); } if(n==1) { cout << 0; return 0; } for(int i=2; i<=n; i++) { for(int j=1; j<=k; j++) { if(item[i][j].fi!=-1) bs=0; } } for(int k=1; k<=n; k++) { for(int i=1; i<=n; i++) { for(int j=1; j<=n; j++) { dis[i][j]=min(dis[i][j], dis[i][k]+dis[k][j]); } } } if(bs) { for(int i=2; i<=n; i++) { if(dis[1][i]!=INF && dis[i][1]!=INF) { for(int j=1; j<=k; j++) { if(item[1][j].fi>0 && item[i][j].se>0) { ans=max(ans, (item[i][j].se-item[1][j].fi)/(dis[1][i]+dis[i][1])); } } } } cout << ans; } }
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