제출 #890735

#제출 시각아이디문제언어결과실행 시간메모리
890735Dec0Dedd여행하는 상인 (APIO17_merchant)C++14
100 / 100
112 ms4180 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<int, int> pii; const int N = 110; const int K = 1e3+10; const ll INF = 1e18; ll b[N][K], s[N][K], w[N][N], mxv[N][N], g2[N][N], n, m, k; void floyd(ll g[N][N]) { for (int k=1; k<=n; ++k) { for (int i=1; i<=n; ++i) { for (int j=1; j<=n; ++j) g[i][j]=min(g[i][j], g[i][k]+g[k][j]); } } } void solve() { 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 j=1; j<=n; ++j) w[i][j]=INF; } for (int i=1; i<=m; ++i) { ll a, b, x; cin>>a>>b>>x; w[a][b]=x; } floyd(w); for (int i=1; i<=n; ++i) { for (int j=1; j<=n; ++j) { for (int x=1; x<=k; ++x) { if (b[i][x] == -1 || s[j][x] == -1) continue; mxv[i][j]=max(mxv[i][j], s[j][x]-b[i][x]); } } } ll ans=0, l=1, r=1e9+10; while (l <= r) { ll md=(l+r)/2; for (int i=1; i<=n; ++i) { for (int j=1; j<=n; ++j) { g2[i][j]=-mxv[i][j]+md*min(w[i][j], INF/md); } } floyd(g2); bool ok=false; for (int i=1; i<=n; ++i) { if (g2[i][i] <= 0) ok=true; } if (ok) ans=md, l=md+1; else r=md-1; } cout<<ans<<"\n"; } int main() { int t=1; while (t--) solve(); }
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