oj.uz

답안 #247669

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
247669 2020-07-11T21:25:22 Z davi_bart 경주 (Race) (IOI11_race) C++14
100 / 100
 1653 ms 96376 KB 
#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#include "race.h"
using namespace std;
typedef long long ll;
//#define int ll
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
set<pair<ll,ll> >v[200010];
ll mi=1e9;
ll KK;
vector<ll> dim(200010),up(200010);
ll dfs(ll pos,ll prec){
  up[pos]=prec;
  dim[pos]++;
  for(auto x:v[pos])if(x.first!=prec)dim[pos]+=dfs(x.first,pos);
  return dim[pos];
}

map<ll,ll> best;
void w(ll pos,ll prec,ll dist,ll archi){
  if(best.count(dist)==0 || archi<best[dist])best[dist]=archi;
  for(auto k:v[pos]){
    if(k.first==prec)continue;
    w(k.first,pos,dist+k.second,archi+1);
  }
}
void calcola(ll pos){
  map<ll,ll> q;
  for(auto k:v[pos]){
    best.clear();
    w(k.first,pos,k.second,1);
    for(auto x:best){
      if(q.count(KK-x.first)){
        mi=min(mi,q[KK-x.first]+x.second);
      }
      if(x.first==KK){
        mi=min(mi,x.second);
      }
    }
    for(auto x:best){
      if(q.count(x.first)==0 || x.second<q[x.first])q[x.first]=x.second;
    }
  }
  //cout<<"calcolato: "<<pos<<" "<<mi<<endl;
}
void centroid(ll pos);
void trova(ll pos,ll nodi){
  if(nodi==1)return;
  for(auto k:v[pos]){
    if(k.first==up[pos])continue;
    if(dim[k.first]>nodi/2){
      trova(k.first,nodi);
      return;
    }
  }
  calcola(pos);
  vector<ll> vicini;
  for(auto k:v[pos]){
    if(v[k.first].find({pos,k.second})!=v[k.first].end())v[k.first].erase({pos,k.second});
    vicini.push_back(k.first);
    if(k.first!=up[pos])up[k.first]=-1;
  }
  v[pos].clear();
  ll g=up[pos];
  while(g!=-1){
    dim[g]-=dim[pos];
    g=up[g];
  }
  //cout<<"pulito: "<<pos<<endl;
  up[pos]=-1;
  for(ll x:vicini){
      centroid(x);
  }
}
void centroid(ll pos){
  //cout<<"centroid: "<<pos<<" ";
  while(up[pos]!=-1){
    pos=up[pos];
  }
  //cout<<pos<<endl;
  trova(pos,dim[pos]);
}
int best_path(int N, int K, int H[][2], int L[]){
  for(ll i=0;i<N-1;i++){
    v[H[i][0]].insert({H[i][1],L[i]});
    v[H[i][1]].insert({H[i][0],L[i]});
  }
  KK=K;
  dfs(0,-1);
  centroid(0);
  if(mi==1e9)return -1;
  else return mi;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 12928 KB Output is correct
2 Correct 11 ms 12928 KB Output is correct
3 Correct 11 ms 12928 KB Output is correct
4 Correct 11 ms 12928 KB Output is correct
5 Correct 11 ms 12928 KB Output is correct
6 Correct 12 ms 13056 KB Output is correct
7 Correct 11 ms 12928 KB Output is correct
8 Correct 11 ms 12928 KB Output is correct
9 Correct 12 ms 12928 KB Output is correct
10 Correct 11 ms 12928 KB Output is correct
11 Correct 11 ms 12920 KB Output is correct
12 Correct 11 ms 12928 KB Output is correct
13 Correct 13 ms 12928 KB Output is correct
14 Correct 11 ms 12928 KB Output is correct
15 Correct 12 ms 12928 KB Output is correct
16 Correct 11 ms 12928 KB Output is correct
17 Correct 11 ms 12928 KB Output is correct
18 Correct 11 ms 12928 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 12928 KB Output is correct
2 Correct 11 ms 12928 KB Output is correct
3 Correct 11 ms 12928 KB Output is correct
4 Correct 11 ms 12928 KB Output is correct
5 Correct 11 ms 12928 KB Output is correct
6 Correct 12 ms 13056 KB Output is correct
7 Correct 11 ms 12928 KB Output is correct
8 Correct 11 ms 12928 KB Output is correct
9 Correct 12 ms 12928 KB Output is correct
10 Correct 11 ms 12928 KB Output is correct
11 Correct 11 ms 12920 KB Output is correct
12 Correct 11 ms 12928 KB Output is correct
13 Correct 13 ms 12928 KB Output is correct
14 Correct 11 ms 12928 KB Output is correct
15 Correct 12 ms 12928 KB Output is correct
16 Correct 11 ms 12928 KB Output is correct
17 Correct 11 ms 12928 KB Output is correct
18 Correct 11 ms 12928 KB Output is correct
19 Correct 11 ms 12928 KB Output is correct
20 Correct 11 ms 12928 KB Output is correct
21 Correct 13 ms 12928 KB Output is correct
22 Correct 15 ms 13184 KB Output is correct
23 Correct 14 ms 13056 KB Output is correct
24 Correct 14 ms 13056 KB Output is correct
25 Correct 14 ms 13056 KB Output is correct
26 Correct 15 ms 13056 KB Output is correct
27 Correct 16 ms 13048 KB Output is correct
28 Correct 15 ms 13184 KB Output is correct
29 Correct 14 ms 13056 KB Output is correct
30 Correct 14 ms 13056 KB Output is correct
31 Correct 14 ms 13184 KB Output is correct
32 Correct 14 ms 13056 KB Output is correct
33 Correct 14 ms 13184 KB Output is correct
34 Correct 14 ms 13184 KB Output is correct
35 Correct 14 ms 13184 KB Output is correct
36 Correct 14 ms 13184 KB Output is correct
37 Correct 14 ms 13056 KB Output is correct
38 Correct 14 ms 13056 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 12928 KB Output is correct
2 Correct 11 ms 12928 KB Output is correct
3 Correct 11 ms 12928 KB Output is correct
4 Correct 11 ms 12928 KB Output is correct
5 Correct 11 ms 12928 KB Output is correct
6 Correct 12 ms 13056 KB Output is correct
7 Correct 11 ms 12928 KB Output is correct
8 Correct 11 ms 12928 KB Output is correct
9 Correct 12 ms 12928 KB Output is correct
10 Correct 11 ms 12928 KB Output is correct
11 Correct 11 ms 12920 KB Output is correct
12 Correct 11 ms 12928 KB Output is correct
13 Correct 13 ms 12928 KB Output is correct
14 Correct 11 ms 12928 KB Output is correct
15 Correct 12 ms 12928 KB Output is correct
16 Correct 11 ms 12928 KB Output is correct
17 Correct 11 ms 12928 KB Output is correct
18 Correct 11 ms 12928 KB Output is correct
19 Correct 355 ms 28024 KB Output is correct
20 Correct 350 ms 28024 KB Output is correct
21 Correct 344 ms 27896 KB Output is correct
22 Correct 333 ms 28024 KB Output is correct
23 Correct 504 ms 28280 KB Output is correct
24 Correct 252 ms 28024 KB Output is correct
25 Correct 315 ms 37624 KB Output is correct
26 Correct 140 ms 45176 KB Output is correct
27 Correct 591 ms 43384 KB Output is correct
28 Correct 1653 ms 96376 KB Output is correct
29 Correct 1622 ms 94200 KB Output is correct
30 Correct 586 ms 43640 KB Output is correct
31 Correct 595 ms 43520 KB Output is correct
32 Correct 692 ms 43512 KB Output is correct
33 Correct 775 ms 44152 KB Output is correct
34 Correct 1339 ms 62200 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 12928 KB Output is correct
2 Correct 11 ms 12928 KB Output is correct
3 Correct 11 ms 12928 KB Output is correct
4 Correct 11 ms 12928 KB Output is correct
5 Correct 11 ms 12928 KB Output is correct
6 Correct 12 ms 13056 KB Output is correct
7 Correct 11 ms 12928 KB Output is correct
8 Correct 11 ms 12928 KB Output is correct
9 Correct 12 ms 12928 KB Output is correct
10 Correct 11 ms 12928 KB Output is correct
11 Correct 11 ms 12920 KB Output is correct
12 Correct 11 ms 12928 KB Output is correct
13 Correct 13 ms 12928 KB Output is correct
14 Correct 11 ms 12928 KB Output is correct
15 Correct 12 ms 12928 KB Output is correct
16 Correct 11 ms 12928 KB Output is correct
17 Correct 11 ms 12928 KB Output is correct
18 Correct 11 ms 12928 KB Output is correct
19 Correct 11 ms 12928 KB Output is correct
20 Correct 11 ms 12928 KB Output is correct
21 Correct 13 ms 12928 KB Output is correct
22 Correct 15 ms 13184 KB Output is correct
23 Correct 14 ms 13056 KB Output is correct
24 Correct 14 ms 13056 KB Output is correct
25 Correct 14 ms 13056 KB Output is correct
26 Correct 15 ms 13056 KB Output is correct
27 Correct 16 ms 13048 KB Output is correct
28 Correct 15 ms 13184 KB Output is correct
29 Correct 14 ms 13056 KB Output is correct
30 Correct 14 ms 13056 KB Output is correct
31 Correct 14 ms 13184 KB Output is correct
32 Correct 14 ms 13056 KB Output is correct
33 Correct 14 ms 13184 KB Output is correct
34 Correct 14 ms 13184 KB Output is correct
35 Correct 14 ms 13184 KB Output is correct
36 Correct 14 ms 13184 KB Output is correct
37 Correct 14 ms 13056 KB Output is correct
38 Correct 14 ms 13056 KB Output is correct
39 Correct 355 ms 28024 KB Output is correct
40 Correct 350 ms 28024 KB Output is correct
41 Correct 344 ms 27896 KB Output is correct
42 Correct 333 ms 28024 KB Output is correct
43 Correct 504 ms 28280 KB Output is correct
44 Correct 252 ms 28024 KB Output is correct
45 Correct 315 ms 37624 KB Output is correct
46 Correct 140 ms 45176 KB Output is correct
47 Correct 591 ms 43384 KB Output is correct
48 Correct 1653 ms 96376 KB Output is correct
49 Correct 1622 ms 94200 KB Output is correct
50 Correct 586 ms 43640 KB Output is correct
51 Correct 595 ms 43520 KB Output is correct
52 Correct 692 ms 43512 KB Output is correct
53 Correct 775 ms 44152 KB Output is correct
54 Correct 1339 ms 62200 KB Output is correct
55 Correct 48 ms 14976 KB Output is correct
56 Correct 30 ms 14336 KB Output is correct
57 Correct 180 ms 27896 KB Output is correct
58 Correct 112 ms 28788 KB Output is correct
59 Correct 563 ms 53112 KB Output is correct
60 Correct 1614 ms 93704 KB Output is correct
61 Correct 629 ms 45304 KB Output is correct
62 Correct 574 ms 43640 KB Output is correct
63 Correct 691 ms 43512 KB Output is correct
64 Correct 1639 ms 52804 KB Output is correct
65 Correct 1409 ms 58592 KB Output is correct
66 Correct 1611 ms 88312 KB Output is correct
67 Correct 455 ms 45804 KB Output is correct
68 Correct 907 ms 58104 KB Output is correct
69 Correct 919 ms 55164 KB Output is correct
70 Correct 848 ms 52216 KB Output is correct