oj.uz

답안 #315636

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
315636 2020-10-23T13:01:55 Z ivan_tudor 경주 (Race) (IOI11_race) C++14
100 / 100
 1621 ms 46712 KB 
#include "race.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 200005;
int n,k;
int ANS;
struct muchii{
  int x;
  int d;
};
vector<muchii> gr[N];
int sz[N];
bool iscentr[N];
void dfs_sz(int nod,int dad){
  sz[nod] = 1;
  for(auto f:gr[nod]){
    if(f.x != dad && iscentr[f.x] == 0){
      dfs_sz(f.x,nod);
      sz[nod] += sz[f.x];
    }
  }
}
int findcentr(int nod,int dad, int bigroot){
  for(auto f:gr[nod]){
    if(f.x != dad && iscentr[f.x] == 0 && sz[f.x] > sz[bigroot]/2)
      return findcentr(f.x, nod, bigroot);
  }
  return nod;
}
void build_dfs(int nod,int dad,int distkm,int dst, map<int,int> &cur){
  if(distkm > k)
    return;
  if(cur.count(distkm))
    cur[distkm] = min(cur[distkm], dst);
  else
    cur[distkm] = dst;
  for(auto f:gr[nod]){
    if(f.x != dad && iscentr[f.x] == 0){
      build_dfs(f.x, nod, distkm + f.d, dst + 1, cur);
    }
  }
}
void buildcentr(int root){
  dfs_sz(root, 0);
  int cen = findcentr(root, 0, root);
  map<int,int> ansc;
  for(auto f:gr[cen]){
    if(iscentr[f.x] == 0){
      map<int,int> cur;
      build_dfs(f.x, cen, f.d, 1, cur);
      for(auto x:cur){
        if(ansc.count(k - x.first)){
          ANS = min(ANS, x.second +  ansc[k - x.first]);
        }
      }
      for(auto x:cur){
        if(ansc.count(x.first))
          ansc[x.first] = min(ansc[x.first], x.second);
        else
          ansc[x.first] = x.second;
      }
    }
  }
  if(ansc.count(k))
    ANS = min(ANS, ansc[k]);
  iscentr[cen] = true;
  for(auto f: gr[cen]){
    if(iscentr[f.x] == 0)
      buildcentr(f.x);
  }
}
int best_path(int _n, int _k, int H[][2], int L[])
{
  k = _k;
  n = _n;
  for(int i=0;i<n-1;i++){
    int x, y;
    x = H[i][0] + 1;
    y = H[i][1] + 1;
    gr[x].push_back({y,L[i]});
    gr[y].push_back({x,L[i]});
  }
  ANS = INT_MAX;
  buildcentr(1);
  if(ANS == INT_MAX)
    return -1;
  return ANS;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 5 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 4992 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 5 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 4992 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 6 ms 5120 KB Output is correct
22 Correct 5 ms 5120 KB Output is correct
23 Correct 5 ms 5248 KB Output is correct
24 Correct 5 ms 5120 KB Output is correct
25 Correct 6 ms 5120 KB Output is correct
26 Correct 5 ms 5120 KB Output is correct
27 Correct 4 ms 5120 KB Output is correct
28 Correct 6 ms 5120 KB Output is correct
29 Correct 6 ms 5120 KB Output is correct
30 Correct 6 ms 5248 KB Output is correct
31 Correct 6 ms 5248 KB Output is correct
32 Correct 7 ms 5248 KB Output is correct
33 Correct 8 ms 5248 KB Output is correct
34 Correct 5 ms 5120 KB Output is correct
35 Correct 5 ms 5120 KB Output is correct
36 Correct 5 ms 5120 KB Output is correct
37 Correct 6 ms 5248 KB Output is correct
38 Correct 6 ms 5120 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 5 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 4992 KB Output is correct
19 Correct 290 ms 11896 KB Output is correct
20 Correct 293 ms 11896 KB Output is correct
21 Correct 302 ms 11768 KB Output is correct
22 Correct 281 ms 11896 KB Output is correct
23 Correct 127 ms 12028 KB Output is correct
24 Correct 118 ms 12024 KB Output is correct
25 Correct 197 ms 14580 KB Output is correct
26 Correct 119 ms 17400 KB Output is correct
27 Correct 321 ms 18884 KB Output is correct
28 Correct 380 ms 30200 KB Output is correct
29 Correct 389 ms 29432 KB Output is correct
30 Correct 311 ms 18808 KB Output is correct
31 Correct 311 ms 19064 KB Output is correct
32 Correct 340 ms 19064 KB Output is correct
33 Correct 518 ms 17912 KB Output is correct
34 Correct 259 ms 18628 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4992 KB Output is correct
2 Correct 4 ms 4992 KB Output is correct
3 Correct 4 ms 4992 KB Output is correct
4 Correct 4 ms 4992 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4992 KB Output is correct
8 Correct 4 ms 4992 KB Output is correct
9 Correct 4 ms 4992 KB Output is correct
10 Correct 4 ms 4992 KB Output is correct
11 Correct 4 ms 4992 KB Output is correct
12 Correct 4 ms 4992 KB Output is correct
13 Correct 5 ms 4992 KB Output is correct
14 Correct 4 ms 4992 KB Output is correct
15 Correct 4 ms 4992 KB Output is correct
16 Correct 4 ms 4992 KB Output is correct
17 Correct 4 ms 4992 KB Output is correct
18 Correct 4 ms 4992 KB Output is correct
19 Correct 4 ms 4992 KB Output is correct
20 Correct 4 ms 4992 KB Output is correct
21 Correct 6 ms 5120 KB Output is correct
22 Correct 5 ms 5120 KB Output is correct
23 Correct 5 ms 5248 KB Output is correct
24 Correct 5 ms 5120 KB Output is correct
25 Correct 6 ms 5120 KB Output is correct
26 Correct 5 ms 5120 KB Output is correct
27 Correct 4 ms 5120 KB Output is correct
28 Correct 6 ms 5120 KB Output is correct
29 Correct 6 ms 5120 KB Output is correct
30 Correct 6 ms 5248 KB Output is correct
31 Correct 6 ms 5248 KB Output is correct
32 Correct 7 ms 5248 KB Output is correct
33 Correct 8 ms 5248 KB Output is correct
34 Correct 5 ms 5120 KB Output is correct
35 Correct 5 ms 5120 KB Output is correct
36 Correct 5 ms 5120 KB Output is correct
37 Correct 6 ms 5248 KB Output is correct
38 Correct 6 ms 5120 KB Output is correct
39 Correct 290 ms 11896 KB Output is correct
40 Correct 293 ms 11896 KB Output is correct
41 Correct 302 ms 11768 KB Output is correct
42 Correct 281 ms 11896 KB Output is correct
43 Correct 127 ms 12028 KB Output is correct
44 Correct 118 ms 12024 KB Output is correct
45 Correct 197 ms 14580 KB Output is correct
46 Correct 119 ms 17400 KB Output is correct
47 Correct 321 ms 18884 KB Output is correct
48 Correct 380 ms 30200 KB Output is correct
49 Correct 389 ms 29432 KB Output is correct
50 Correct 311 ms 18808 KB Output is correct
51 Correct 311 ms 19064 KB Output is correct
52 Correct 340 ms 19064 KB Output is correct
53 Correct 518 ms 17912 KB Output is correct
54 Correct 259 ms 18628 KB Output is correct
55 Correct 32 ms 6016 KB Output is correct
56 Correct 21 ms 5632 KB Output is correct
57 Correct 182 ms 11896 KB Output is correct
58 Correct 65 ms 11628 KB Output is correct
59 Correct 554 ms 24648 KB Output is correct
60 Correct 1621 ms 46712 KB Output is correct
61 Correct 423 ms 19192 KB Output is correct
62 Correct 479 ms 19192 KB Output is correct
63 Correct 551 ms 19192 KB Output is correct
64 Correct 1613 ms 30260 KB Output is correct
65 Correct 328 ms 19832 KB Output is correct
66 Correct 1061 ms 28920 KB Output is correct
67 Correct 202 ms 19556 KB Output is correct
68 Correct 617 ms 26744 KB Output is correct
69 Correct 622 ms 26744 KB Output is correct
70 Correct 593 ms 25848 KB Output is correct