Submission #1005930

#	Time	Username	Problem	Language	Result	Execution time	Memory
1005930		thelegendary08	Closing Time (IOI23_closing)	C++17	17 / 100	1063 ms	37144 KiB

closing

#include "closing.h"
#include<bits/stdc++.h>
#define f0r(i,n) for(int i = 0;i<n;i++)
#define FOR(i, k, n) for(int i = k;i<n;i++)
#define pb push_back
#define vi vector<long long int>
#define ll long long int
using namespace std;

int max_score(int N, int X, int Y, long long K,
              std::vector<int> U, std::vector<int> V, std::vector<int> W)
{
    vector<pair<ll,ll>> adj[N];
    f0r(i, N-1){
    	adj[U[i]].pb({V[i], W[i]});
    	adj[V[i]].pb({U[i], W[i]});
    }
    vector<vector<ll>>dist(N, vector<ll>(2, 4e18));
    vector<bool>vis(N, 0);
    queue<int>q;
    q.push(X);
    vis[X] = 1;
    dist[X][0] = 0;
    while(!q.empty()){
    	int c = q.front();
    	q.pop();
    	for(auto u : adj[c]){
    		if(vis[u.first])continue;
    		vis[u.first] = 1;
    		dist[u.first][0] = min(dist[u.first][0], dist[c][0] + u.second);
    		q.push(u.first);
    	}
    }
    f0r(i,N)vis[i] = 0;
    vis[Y] = 1;
    dist[Y][1] = 0;
    q.push(Y);
    while(!q.empty()){
    	int c = q.front();
    	q.pop();
    	for(auto u : adj[c]){
    		if(vis[u.first])continue;
    		vis[u.first] = 1;
    		dist[u.first][1] = min(dist[u.first][1], dist[c][1] + u.second);
    		q.push(u.first);
    	}
    }
    if(dist[Y][0] > 2 * K){
    	vector<ll> dists;
	    f0r(i, N){
	    	dists.pb(min(dist[i][0], dist[i][1]));
	    }
	    sort(dists.begin(), dists.end());
		int ans = 0;
		ll s = 0;
		f0r(i, N){
			if(s + dists[i] > K)break;
			ans++;
			s += dists[i];
		}
		return ans;
    }
    else{
    	ll ps[N+1][3];
    	
    	int ans = 0;
    	ps[0][0] = 0;
    	ps[0][1] = 0;
    	ps[0][2] = 0;
    	FOR(i, 1, N+1){
    		ps[i][0] = ps[i-1][0] + dist[i-1][0];
    		ps[i][1] = ps[i-1][1] + dist[i-1][1];
    		ps[i][2] = ps[i-1][2] + max(dist[i-1][0], dist[i-1][1]);
    	}
    	
    	vi ps2;
    	f0r(i, N+1){
    		ps2.pb(ps[i][1]);
    	}
    	/*
    	f0r(i, N+1)cout<<ps[i][0]<<' ';
    	cout<<'\n';
    	f0r(i, N+1){
    		cout<<ps2[i]<<' ';
    		//cout<<ps[i][1]<<' ';
    	}
    	cout<<'\n';
    	f0r(i, N+1)cout<<ps[i][2]<<' ';
    	cout<<'\n';
    	*/
    	
    	f0r(l1, X+1){
    		f0r(l2, Y+1){
    			FOR(r1, X, N){
    				FOR(r2, Y, N){
    					vector<int> thing = {l1, l2, r1, r2};
    					sort(thing.begin(), thing.end());
    					if(thing[0] == l1 && thing[1] == r1 && thing[2] == l2 && r1 < l2){
    						//cout<<l1<<' '<<r1<<' '<<l2<<' '<<r2<<' '<<ps[r1+1][0] - ps[l1][0] + ps[r2+1][1] - ps[l1][1]<<'\n';
    						if(ps[r1+1][0] - ps[l1][0] + ps[r2+1][1] - ps[l2][1] <= K)ans = max(ans, r1 - l1 + r2 - l2 + 2);	
    						//if(r1 - l1 + r2 - l2 + 2 == 4 && ps[r1+1][0] - ps[l1][0] + ps[r2+1][1] - ps[l2][1] <= K)cout<<l1<<' '<<r1<<' '<<l2<<' '<<r2<<' '<<ps[r1+1][0] - ps[l1][0] + ps[r2+1][1] - ps[l2][1]<<'\n';
    					}
    					else{
    						ll cur = 0;
    						if(thing[0] == l1)cur += ps[thing[1]][0] - ps[l1][0];
    						else cur += ps[thing[1]][1] - ps[thing[0]][0];
    						cur += ps[thing[2]+1][2] - ps[thing[1]][2];
    						if(thing[3] == r1)cur += ps[thing[3]+1][0] - ps[thing[2]+1][0];
    						else cur += ps[thing[3]+1][1] - ps[thing[2] + 1][1];
    						if(cur <= K)ans = max(ans, thing[1] - thing[0] + 2 * (thing[2] - thing[1] + 1) + thing[3] - thing[2]);
    					}
    				}
    			}
    		}
    	}
    	return ans;
    }
    
}

• Subtask 0: 0 / 0
• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 0 / 12
• Subtask 4: 0 / 14
• Subtask 5: 0 / 9
• Subtask 6: 0 / 11
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 17