Submission #1133812

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1133812	2025-01-08 23:23:20	Math4Life2020	Road Closures (APIO21_roads)	C++20	31 / 100	2096 ms	33008 KiB

roads

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include "roads.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long; using pii = pair<ll,ll>;
mt19937 gen;
const ll Nm = 1e5+5; ll N;
const ll K = 100; //sqrt(N)
ll ans[Nm];
vector<pii> adj[Nm];
vector<ll> fadj[Nm];
ll deg[Nm];
pii radj[Nm]; //{number, cost}
vector<ll> itpl; //inverse topological sort
ll dp0[Nm]; //no path up
ll dp1[Nm]; //path up
ll slvH(ll k) { //O(NlogN) independent of k
  for (ll i=(N-1);i>=0;i--) {
    ll x = itpl[i];
    vector<ll> vaug; //augment vector
    ll val0 = 0; //minimum value
    for (ll y: fadj[x]) {
      val0 += dp0[y];
      vaug.push_back(dp1[y]-dp0[y]);
    }
    sort(vaug.begin(),vaug.end()); //can upgrade quicksort -> quickselect for true O(N)
    ll NDEL = max(0LL,deg[x]-k);
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

• Subtask 1: 0 / 5
• Subtask 2: 7 / 7
• Subtask 3: 14 / 14
• Subtask 4: 10 / 10
• Subtask 5: 0 / 17
• Subtask 6: 0 / 25
• Subtask 7: 0 / 22