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답안 #413697

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
413697 2021-05-29T09:02:43 Z Mahmudul_Kabir 경주 (Race) (IOI11_race) C++14
100 / 100
 1233 ms 54976 KB 
#include "race.h"
 
#include <bits/stdc++.h>
 
#define sp <<" "
#define el <<"\n"
#define S second
#define F first
#define pb push_back
#define all(ar) ar.begin(),ar.end()
#define pii pair<ll,ll>
 
 
using namespace std;
using ll = long long;
using ld = long double;
 
const ll mxr = 200005;
const ll big = 2000000999;
 
ll n,k,path[1000011],mac,ans = big;
vector<vector<pii>> g;
bitset<mxr> ded;
vector<ll> sz(mxr); 
 
void dfs(ll v,ll p){
  sz[v] = 1;
  for(pii r: g[v]){
    if(r.F == p || ded[r.F]) continue; 
    dfs(r.F,v); 
    sz[v] += sz[r.F]; 
  }
  return; 
}
 
ll fcen(ll v,ll p,ll lim){
  for(pii r: g[v]){
    if(r.F == p || ded[r.F]) continue;
    if(sz[r.F] > lim) return fcen(r.F,v,lim);
  }
  return v;
}
 
void fil(ll v,ll p,ll cost,ll dep,unordered_map<ll,ll> &dis){
  if(cost > k) return;
  ans = min(ans,dep + path[k - cost]); 
  dis[cost] = dis.count(cost) ? min(dis[cost],dep) : dep; 
  for(pii r: g[v]){
    if(r.F == p || ded[r.F]) continue;
    fil(r.F,v,cost + r.S,dep+1,dis);
  }
  return;
}
 
void decompose(ll v){
  dfs(v,-1);
  ll lim = (sz[v]/2);
  ll cen = fcen(v,-1,lim);  
  ded[cen] = 1;
  unordered_set<ll> cum;  
  for(pii r: g[cen]){
    if(ded[r.F]) continue; 
    unordered_map<ll,ll> dis; 
    fil(r.F,cen,r.S,1,dis);
    for(pii x: dis){
      cum.insert(x.F); 
      path[x.F] = min(x.S,path[x.F]); 
    }
  } 
  ans = min(ans,path[k]); 
  for(ll i : cum) path[i] = big;
  for(pii r: g[cen]){
    if(!ded[r.F]) decompose(r.F);
  }
}
 
int best_path(int N, int K, int H[][2], int L[])
{
  n = N;
  k = K;
  g.assign(n,{});
  for(ll i = 1; i < n; i++){
    ll a = H[i-1][0], b = H[i-1][1], c = L[i-1]; 
    g[a].pb({b,c});
    g[b].pb({a,c});
  }
  for(ll i = 0; i <= 1000010; i++) path[i] = big; 
  decompose(0);
  return ans == big ? -1 : ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 6 ms 9676 KB Output is correct
4 Correct 6 ms 9676 KB Output is correct
5 Correct 6 ms 9676 KB Output is correct
6 Correct 6 ms 9656 KB Output is correct
7 Correct 6 ms 9628 KB Output is correct
8 Correct 6 ms 9676 KB Output is correct
9 Correct 6 ms 9676 KB Output is correct
10 Correct 6 ms 9676 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 6 ms 9676 KB Output is correct
14 Correct 6 ms 9676 KB Output is correct
15 Correct 6 ms 9676 KB Output is correct
16 Correct 6 ms 9676 KB Output is correct
17 Correct 6 ms 9672 KB Output is correct
18 Correct 6 ms 9676 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 6 ms 9676 KB Output is correct
4 Correct 6 ms 9676 KB Output is correct
5 Correct 6 ms 9676 KB Output is correct
6 Correct 6 ms 9656 KB Output is correct
7 Correct 6 ms 9628 KB Output is correct
8 Correct 6 ms 9676 KB Output is correct
9 Correct 6 ms 9676 KB Output is correct
10 Correct 6 ms 9676 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 6 ms 9676 KB Output is correct
14 Correct 6 ms 9676 KB Output is correct
15 Correct 6 ms 9676 KB Output is correct
16 Correct 6 ms 9676 KB Output is correct
17 Correct 6 ms 9672 KB Output is correct
18 Correct 6 ms 9676 KB Output is correct
19 Correct 6 ms 9676 KB Output is correct
20 Correct 6 ms 9676 KB Output is correct
21 Correct 7 ms 9804 KB Output is correct
22 Correct 7 ms 9804 KB Output is correct
23 Correct 7 ms 9804 KB Output is correct
24 Correct 7 ms 9804 KB Output is correct
25 Correct 10 ms 9792 KB Output is correct
26 Correct 7 ms 9804 KB Output is correct
27 Correct 6 ms 9804 KB Output is correct
28 Correct 8 ms 9804 KB Output is correct
29 Correct 8 ms 9804 KB Output is correct
30 Correct 8 ms 9812 KB Output is correct
31 Correct 8 ms 9872 KB Output is correct
32 Correct 8 ms 9832 KB Output is correct
33 Correct 8 ms 9816 KB Output is correct
34 Correct 7 ms 9804 KB Output is correct
35 Correct 7 ms 9804 KB Output is correct
36 Correct 7 ms 9804 KB Output is correct
37 Correct 10 ms 9804 KB Output is correct
38 Correct 10 ms 9804 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 6 ms 9676 KB Output is correct
4 Correct 6 ms 9676 KB Output is correct
5 Correct 6 ms 9676 KB Output is correct
6 Correct 6 ms 9656 KB Output is correct
7 Correct 6 ms 9628 KB Output is correct
8 Correct 6 ms 9676 KB Output is correct
9 Correct 6 ms 9676 KB Output is correct
10 Correct 6 ms 9676 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 6 ms 9676 KB Output is correct
14 Correct 6 ms 9676 KB Output is correct
15 Correct 6 ms 9676 KB Output is correct
16 Correct 6 ms 9676 KB Output is correct
17 Correct 6 ms 9672 KB Output is correct
18 Correct 6 ms 9676 KB Output is correct
19 Correct 223 ms 18364 KB Output is correct
20 Correct 210 ms 18372 KB Output is correct
21 Correct 274 ms 18392 KB Output is correct
22 Correct 200 ms 18392 KB Output is correct
23 Correct 124 ms 18720 KB Output is correct
24 Correct 122 ms 17852 KB Output is correct
25 Correct 220 ms 21188 KB Output is correct
26 Correct 140 ms 24184 KB Output is correct
27 Correct 273 ms 27380 KB Output is correct
28 Correct 377 ms 38712 KB Output is correct
29 Correct 373 ms 37700 KB Output is correct
30 Correct 268 ms 27424 KB Output is correct
31 Correct 280 ms 27592 KB Output is correct
32 Correct 325 ms 27476 KB Output is correct
33 Correct 394 ms 26304 KB Output is correct
34 Correct 228 ms 26184 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 6 ms 9676 KB Output is correct
4 Correct 6 ms 9676 KB Output is correct
5 Correct 6 ms 9676 KB Output is correct
6 Correct 6 ms 9656 KB Output is correct
7 Correct 6 ms 9628 KB Output is correct
8 Correct 6 ms 9676 KB Output is correct
9 Correct 6 ms 9676 KB Output is correct
10 Correct 6 ms 9676 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 6 ms 9676 KB Output is correct
14 Correct 6 ms 9676 KB Output is correct
15 Correct 6 ms 9676 KB Output is correct
16 Correct 6 ms 9676 KB Output is correct
17 Correct 6 ms 9672 KB Output is correct
18 Correct 6 ms 9676 KB Output is correct
19 Correct 6 ms 9676 KB Output is correct
20 Correct 6 ms 9676 KB Output is correct
21 Correct 7 ms 9804 KB Output is correct
22 Correct 7 ms 9804 KB Output is correct
23 Correct 7 ms 9804 KB Output is correct
24 Correct 7 ms 9804 KB Output is correct
25 Correct 10 ms 9792 KB Output is correct
26 Correct 7 ms 9804 KB Output is correct
27 Correct 6 ms 9804 KB Output is correct
28 Correct 8 ms 9804 KB Output is correct
29 Correct 8 ms 9804 KB Output is correct
30 Correct 8 ms 9812 KB Output is correct
31 Correct 8 ms 9872 KB Output is correct
32 Correct 8 ms 9832 KB Output is correct
33 Correct 8 ms 9816 KB Output is correct
34 Correct 7 ms 9804 KB Output is correct
35 Correct 7 ms 9804 KB Output is correct
36 Correct 7 ms 9804 KB Output is correct
37 Correct 10 ms 9804 KB Output is correct
38 Correct 10 ms 9804 KB Output is correct
39 Correct 223 ms 18364 KB Output is correct
40 Correct 210 ms 18372 KB Output is correct
41 Correct 274 ms 18392 KB Output is correct
42 Correct 200 ms 18392 KB Output is correct
43 Correct 124 ms 18720 KB Output is correct
44 Correct 122 ms 17852 KB Output is correct
45 Correct 220 ms 21188 KB Output is correct
46 Correct 140 ms 24184 KB Output is correct
47 Correct 273 ms 27380 KB Output is correct
48 Correct 377 ms 38712 KB Output is correct
49 Correct 373 ms 37700 KB Output is correct
50 Correct 268 ms 27424 KB Output is correct
51 Correct 280 ms 27592 KB Output is correct
52 Correct 325 ms 27476 KB Output is correct
53 Correct 394 ms 26304 KB Output is correct
54 Correct 228 ms 26184 KB Output is correct
55 Correct 25 ms 10924 KB Output is correct
56 Correct 20 ms 10592 KB Output is correct
57 Correct 154 ms 18728 KB Output is correct
58 Correct 59 ms 17940 KB Output is correct
59 Correct 341 ms 30200 KB Output is correct
60 Correct 1233 ms 54976 KB Output is correct
61 Correct 357 ms 27568 KB Output is correct
62 Correct 418 ms 27508 KB Output is correct
63 Correct 548 ms 27588 KB Output is correct
64 Correct 1043 ms 37020 KB Output is correct
65 Correct 297 ms 27044 KB Output is correct
66 Correct 1062 ms 36880 KB Output is correct
67 Correct 177 ms 26292 KB Output is correct
68 Correct 599 ms 33084 KB Output is correct
69 Correct 561 ms 32704 KB Output is correct
70 Correct 512 ms 32000 KB Output is correct