Submission #106836

#	Time	Username	Problem	Language	Result	Execution time	Memory
106836		ami	Ceste (COCI17_ceste)	C++14	96 / 160	2534 ms	692 KiB

ceste

#include <bits/stdc++.h>
#define sz(c)      int(c.size())
#define rep(i,a,b) for (int i=a; i<(b); ++i)
#define per(i,a,b) for (int i=(b)-1; i>=(a); --i)
using namespace std;
using ll = long long;

struct edge_t {
	int to,t,c;
	ll w;
};

ll const INFLL=ll(1e18);
int const INF=int(1e9);
int const MAXN=2200;

int N,M;
vector<edge_t> adj[MAXN];
int res[MAXN];
ll d[MAXN];
tuple<int,int,int> pr[MAXN];

void test(ll x, ll y) {
	rep(i,0,N) {
		for (auto &e:adj[i]) e.w=e.t*x + e.c*y;
	}
	
	rep(i,0,N) {
		d[i]=INFLL;
		pr[i]={-1,-1,-1};
	}
	d[0]=0;
	
	priority_queue<pair<ll,int>> q;
	q.emplace(0,0);
	while (!q.empty()) {
		ll w;
		int v;
		tie(w,v)=q.top();
		w=-w;
		q.pop();
		
		if (w!=d[v]) continue;
		
		for (auto e:adj[v]) {
			int u=e.to;
			if (d[u]>w+e.w) {
				d[u]=w+e.w;
				pr[u]={v,e.t,e.c};
				q.emplace(-d[u],u);
			}
		}
	}
	
	rep(i,1,N) {
		int v=i,st=0,sc=0;
		while (v!=-1) {
			int t,c;
			tie(v,t,c)=pr[v];
			if (v!=-1) {
				st+=t;
				sc+=c;
			}
		}
		if (st*sc!=0) {
			res[i]=min(res[i],st*sc);
		}
	}
}

int main() {
	cin.tie(0);
	ios_base::sync_with_stdio(0);
	cout<<fixed<<setprecision(10);
	
	cin>>N>>M;
	rep(i,0,M) {
		int u,v,t,c;
		cin>>u>>v>>t>>c;
		u--, v--;
		adj[u].push_back({v,t,c,0});
		adj[v].push_back({u,t,c,0});
	}

	rep(i,1,N) res[i]=INF;
	
	int const MAXX=10000;
	rep(x,0,MAXX+1) test(x,MAXX-x);

	rep(i,1,N) if (res[i]==INF) cout<<"-1\n"; else cout<<res[i]<<"\n";
}

• Subtask 1: 16 / 16
• Subtask 2: 16 / 16
• Subtask 3: 16 / 16
• Subtask 4: 16 / 16
• Subtask 5: 16 / 16
• Subtask 6: 16 / 16
• Subtask 7: 0 / 16
• Subtask 8: 0 / 16
• Subtask 9: 0 / 16
• Subtask 10: 0 / 16