Submission #1079461

#	Time	Username	Problem	Language	Result	Execution time	Memory
1079461		thelegendary08	Treatment Project (JOI20_treatment)	C++14	0 / 100	31 ms	7372 KiB

treatment

#include<bits/stdc++.h>
#define pb push_back
#define int long long
#define vi vector<int>
#define vvi vector<vector<int>>
#define vll vector<long long int>
#define vvll vector<vector<long long int>>
#define pii pair<int, int>
#define vpii vector<pair<int, int>>
#define vc vector<char>
#define vvc vector<vector<char>>
#define vb vector<bool>
#define mii map<int,int>
#define mll map<long long int, long long int>
#define mivi map<int,vector<int>>
#define f0r(i,n) for(int i=0;i<n;i++)
#define FOR(i,k,n) for(int i=k;i<n;i++)
using namespace std;
const int mxn = 5005;
struct project{
	int t, l, r, c;
};
int n,m;
vi adj[mxn];
bool can(project a, project b){
	//cout<<a.t<<' '<<b.t<<"TImE"<<'\n';
	if(a.l > b.l)swap(a, b);
	if(a.r+1 < b.l){
		//cout<<a.l<<' '<<b.l<<' '<<a.r<<' '<<b.r<<'\n';
		return 0;
	}
	if(a.r + 1 == b.l){
		return a.t == b.t;
	}
	if(a.r >= b.l){
		//cout<<(a.l - b.r + 1)/2<<' '<<abs(b.t - a.t)<<'\n';
		//cout<<
		return (a.r - b.l + 1)/((a.l == 1 || b.r == n || b.l == 1 || a.r == n) ? 1 : 2) >= abs(b.t - a.t);
	}
	
	return 0;
}
signed main(){
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	//ifstream cin(".in");
	//ofstream cout(".out");
	
	cin>>n>>m;
	vector<project>v;
	f0r(i, m){
		int a,b,c,d;
		cin>>a>>b>>c>>d;
		v.pb({a,b,c,d});
	}
	//sort(v.begin(), v.end());
	f0r(i, m){
		FOR(j, i+1, m){
			if(can(v[i], v[j])){
				adj[i].pb(j);
				adj[j].pb(i);
			}
		}
	}
	f0r(i, m){
		//for(auto u : adj[i])cout<<u<<' ';
		//cout<<'\n';
	}
	vi dist(m, 4e18);
	priority_queue<pii>q;
	vi endpts;
	f0r(i, m){
		if(v[i].l == 1){
			dist[i] = v[i].c;
			q.push({-v[i].c, i});
		}
		if(v[i].r == n){
			endpts.pb(i);
		}
	}
	while(!q.empty()){
		int node = q.top().second;
		q.pop();
		for(auto u : adj[node]){
			if(dist[u] > dist[node] + v[u].c){
				dist[u] = dist[node] + v[u].c;
				q.push({-dist[u], u});
			}
		}
	}
	int ans = 4e18;
	for(auto u : endpts){
		ans = min(ans, dist[u]);
	}
	if(ans == 4e18)cout<<-1;
	else cout<<ans;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 5
• Subtask 3: 0 / 30
• Subtask 4: 0 / 61