제출 #829288

#제출 시각아이디문제언어결과실행 시간메모리
829288bachhoangxuan여행하는 상인 (APIO17_merchant)C++17
100 / 100
82 ms4224 KiB
// Judges with GCC >= 12 only needs Ofast // #pragma GCC optimize("O3,no-stack-protector,fast-math,unroll-loops,tree-vectorize") // MLE optimization // #pragma GCC optimize("conserve-stack") // Old judges // #pragma GCC target("sse4.2,popcnt,lzcnt,abm,mmx,fma,bmi,bmi2") // New judges. Test with assert(__builtin_cpu_supports("avx2")); // #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma,tune=native") // Atcoder // #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma") /* #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> using namespace __gnu_pbds; typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set; - insert(x),erase(x) - find_by_order(k): return iterator to the k-th smallest element - order_of_key(x): the number of elements that are strictly smaller */ #include<bits/stdc++.h> using namespace std; mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); uniform_real_distribution<> pp(0.0,1.0); #define int long long #define ld long double #define pii pair<int,int> #define piii pair<int,pii> #define mpp make_pair #define fi first #define se second const int inf=1e9; const int mod=998244353; const int maxn=105; const int bl=650; const int maxs=655; const int maxm=200005; const int maxq=1000005; const int maxl=20; const int maxa=1000000; const int root=3; int power(int a,int n){ int res=1; while(n){ if(n&1) res=res*a%mod; a=a*a%mod;n>>=1; } return res; } const int iroot=power(3,mod-2); const int base=101; int n,m,K,dist[maxn][maxn],d[maxn][maxn],dd[maxn][maxn]; int s[maxn][1005],b[maxn][1005]; void solve(){ cin >> n >> m >> K; for(int i=1;i<=n;i++) for(int j=1;j<=n;j++) dist[i][j]=inf; for(int i=1;i<=n;i++){ for(int j=0;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; dist[u][v]=min(dist[u][v],w); } for(int k=1;k<=n;k++){ for(int i=1;i<=n;i++) for(int j=1;j<=n;j++) dist[i][j]=min(dist[i][j],dist[i][k]+dist[k][j]); } /* for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++) cout << dist[i][j] << ' '; cout << '\n'; } */ for(int i=1;i<=n;i++) for(int j=1;j<=n;j++){ for(int k=0;k<K;k++) if(b[i][k]<s[j][k] && b[i][k]!=-1) d[i][j]=max(d[i][j],s[j][k]-b[i][k]); } /* for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++) cout << d[i][j] << ' '; cout << '\n'; } */ auto check = [&](int mid){ for(int i=1;i<=n;i++) for(int j=1;j<=n;j++) dd[i][j]=d[i][j]-dist[i][j]*mid; /* cout << mid << '\n'; for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++) cout << dd[i][j] << ' '; cout << '\n'; } */ for(int k=1;k<=n;k++){ for(int i=1;i<=n;i++) for(int j=1;j<=n;j++) dd[i][j]=max(dd[i][j],dd[i][k]+dd[k][j]); } for(int i=1;i<=n;i++) if(dd[i][i]>=0) return true; return false; }; int l=1,r=inf,res=0; while(r>=l){ int mid=(l+r)>>1; if(check(mid)) res=mid,l=mid+1; else r=mid-1; } cout << res << '\n'; } signed main(){ ios_base::sync_with_stdio(false); cin.tie(NULL);cout.tie(NULL); int test=1;//cin >> test; while(test--) solve(); }
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