Submission #1030004

#	Time	Username	Problem	Language	Result	Execution time	Memory
1030004		mindiyak	Closing Time (IOI23_closing)	C++17	0 / 100	264 ms	49372 KiB

closing

#include "closing.h"
#pragma GCC optimize("O1,O2,O3,Ofast,unroll-loops")
#include <bits/stdc++.h>
#include <string>
#include <iostream>
#include <cmath>
#include <numeric>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pi;
typedef pair<int, int> pl;
typedef pair<ld, ld> pd;
typedef vector<int> vi;
typedef vector<bool> vb;
typedef vector<vector<int>> vvi;
typedef vector<vector<ll>> vvl;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
#define FOR(i, a, b) for (int i = a; i < (b); i++)
#define F0R(i, a) for (int i = 0; i < (a); i++)
#define FORd(i, a, b) for (int i = (b)-1; i >= a; i--)
#define F0Rd(i, a) for (int i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto &a : x)
#define uid(a, b) uniform_int_distribution<int>(a, b)(rng)
#define len(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define F first
#define nl endl
#define S second
#define lb lower_bound
#define ub upper_bound
#define aint(x) x.begin(), x.end()
#define raint(x) x.rbegin(), x.rend()
#define ins insert
const int MOD = 1000000007;

priority_queue<pair<ll,int>> arr;
vector<vpi> paths(2e5+5);
vector<priority_queue<ll>> costs(2e5+5, priority_queue<ll>());
vi costindex(2e5+5,0);

void dfs(int pos,int cost,int prev){
    for(pi edge:paths[pos]){
        if(edge.F == prev)continue;
        // cout << pos << " " << edge.F << " " << edge.S << " " << cost << " " << isX << endl;
        costs[edge.F].push(-(edge.S+cost));
        dfs(edge.F,edge.S+cost,pos);
    }
}

int max_score(int N, int X, int Y, ll K,vi U, vi V, vi W)
{
    arr = priority_queue<pair<ll,int>>();
    paths = vector<vpi>(2e5+5);
    costs = vector<priority_queue<ll>>(2e5+5, priority_queue<ll>());
    costindex = vi(2e5+5,0);

    FOR(i,0,N-1){
        paths[U[i]].pb({V[i],W[i]});
        paths[V[i]].pb({U[i],W[i]});
    }

    // vi visited(2e5+5);
    dfs(X,0,-1);
    dfs(Y,0,-1);

    int ans = 2;

    FOR(i,0,N){
        if(!costs[i].empty()){
            arr.push({costs[i].top(),i});
            costs[i].pop();
        }
    }

    while(K > 0){
        if(arr.empty())break;

        pair<ll,int> node = arr.top();arr.pop();
        ll a = -node.F;
        int pos = node.S;
        if(!costs[pos].empty()){
            ll diffcost = -costs[pos].top()-a;
            costs[pos].pop();
            arr.push({-diffcost,pos});
        }

        // cout << K << " " << a << " " << pos << endl;

        if(K >= a){
            K-=a;
            ans++;
        }else{
            break;
        }
    }

    return ans;
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 8
• Subtask 2: 0 / 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