Submission #748961

#	Time	Username	Problem	Language	Result	Execution time	Memory
748961		Dan4Life	Treatment Project (JOI20_treatment)	C++17	5 / 100	3055 ms	245836 KiB

treatment

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define int long long
const int mxM = (int)5e3+10;
const int LINF = (int)1e18;
using pii = pair<int,int>;

int n, m, ans=LINF;
int dis[mxM], vis[mxM];
vector<pii> adj[mxM];
struct Project{ int t, l, r, c; } a[mxM];

int dijkstra(int s){
	fill(dis,dis+m,LINF); fill(vis,vis+m,0); dis[s]=0;
	for(int i = 0; i < n; i++){
		int a = -1;
		for(int j = 0; j < m; j++)
			if(!vis[j] and (a==-1 or dis[a]>dis[j])) a=j;
		if(a==-1) break; vis[a]=1;
		for(auto [b,w]: adj[a]){
			if(dis[a]+w < dis[b]){
				dis[b]=dis[a]+w;
			}
		}
	}
	int d = LINF;
	for(int i = 0; i < m; i++) 
		if(a[i].r==n) d=min(d,dis[i]);
	return d;
}

int32_t main() {
	ios_base::sync_with_stdio(false); cin.tie(0);
	cin >> n >> m;
	for(int i = 0; i < m; i++) 
		cin >> a[i].t >> a[i].l >> a[i].r >> a[i].c;
	for(int i = 0; i < m; i++)
		for(int j = 0; j < m; j++)
			if(a[i].r-abs(a[i].t-a[j].t)>=a[j].l-1 and i!=j)
				adj[i].pb({j,a[j].c});
	for(int i = 0; i < m; i++)
		if(a[i].l==1) ans = min(ans, a[i].c+dijkstra(i));
	cout << (ans==LINF?-1:ans);
}

Compilation message (stderr)

treatment.cpp: In function 'long long int dijkstra(long long int)':
treatment.cpp:20:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   20 |   if(a==-1) break; vis[a]=1;
      |   ^~
treatment.cpp:20:20: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   20 |   if(a==-1) break; vis[a]=1;
      |                    ^~~

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