oj.uz

Submission #229414

# Submission time Handle Problem Language Result Execution time Memory
229414 2020-05-04T12:17:54 Z quocnguyen1012 Race (IOI11_race) C++14
100 / 100
 503 ms 66704 KB 
#ifndef LOCAL
#include "race.h"
#endif // LOCAL
#include <bits/stdc++.h>

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define ar array

using namespace std;
typedef long long ll;
typedef pair<int, int> ii;

const int maxn = 2e5 + 5;

map<ll, int> sub[maxn];
vector<ii> adj[maxn];
int N, K;
int res = 1e9;

void dfs(int u, int p = -1, int h = 0, ll w = 0)
{
  sub[u][w] = h;
  for(auto it : adj[u]) if(it.fi != p){
    dfs(it.fi, u, h + 1, w + it.se);
    int v = it.fi;
    if(sub[u].size() < sub[v].size())
      swap(sub[u], sub[v]);
    for(auto & all : sub[v]){
      if(sub[u].count(K + 2 * w - all.fi)){
        res = min(res, sub[u][K + 2 * w - all.fi] + all.se - 2 * h);
      }
    }
    for(auto & all : sub[v]){
      if(sub[u].count(all.fi)){
        sub[u][all.fi] = min(sub[u][all.fi], all.se);
      }
      else{
        sub[u][all.fi] = all.se;
      }
    }
    sub[v].clear();
  }
}

int best_path(int _N, int _K, int H[][2], int L[])
{
  N = _N;
  K = _K;
  for(int i = 0; i < N - 1; ++i){
    adj[H[i][0]].eb(H[i][1], L[i]);
    adj[H[i][1]].eb(H[i][0], L[i]);
    //cerr << H[i][0] << ' ' << H[i][1] << ' ' << L[i] << '\n';
  }
  dfs(0);
  if(res == 1e9) res = -1;
  return res;
}

#ifdef LOCAL
signed main(void)
{
  ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  #ifdef LOCAL
    freopen("A.INP", "r", stdin);
    freopen("A.OUT", "w", stdout);
  #endif // LOCAL
  int _N, _K; cin >> _N >> _K;
  int H[_N][2];
  int L[_N];
  for(int i = 0; i < _N - 1; ++i)
    cin >> H[i][0] >> H[i][1] >> L[i];
  cout << best_path(_N, _K, H, L);
}
#endif //LOCAL

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 14464 KB Output is correct
2 Correct 12 ms 14464 KB Output is correct
3 Correct 12 ms 14464 KB Output is correct
4 Correct 13 ms 14464 KB Output is correct
5 Correct 12 ms 14464 KB Output is correct
6 Correct 12 ms 14464 KB Output is correct
7 Correct 12 ms 14464 KB Output is correct
8 Correct 12 ms 14464 KB Output is correct
9 Correct 12 ms 14464 KB Output is correct
10 Correct 12 ms 14464 KB Output is correct
11 Correct 12 ms 14464 KB Output is correct
12 Correct 12 ms 14464 KB Output is correct
13 Correct 12 ms 14464 KB Output is correct
14 Correct 12 ms 14464 KB Output is correct
15 Correct 13 ms 14464 KB Output is correct
16 Correct 12 ms 14464 KB Output is correct
17 Correct 12 ms 14464 KB Output is correct
18 Correct 13 ms 14464 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 14464 KB Output is correct
2 Correct 12 ms 14464 KB Output is correct
3 Correct 12 ms 14464 KB Output is correct
4 Correct 13 ms 14464 KB Output is correct
5 Correct 12 ms 14464 KB Output is correct
6 Correct 12 ms 14464 KB Output is correct
7 Correct 12 ms 14464 KB Output is correct
8 Correct 12 ms 14464 KB Output is correct
9 Correct 12 ms 14464 KB Output is correct
10 Correct 12 ms 14464 KB Output is correct
11 Correct 12 ms 14464 KB Output is correct
12 Correct 12 ms 14464 KB Output is correct
13 Correct 12 ms 14464 KB Output is correct
14 Correct 12 ms 14464 KB Output is correct
15 Correct 13 ms 14464 KB Output is correct
16 Correct 12 ms 14464 KB Output is correct
17 Correct 12 ms 14464 KB Output is correct
18 Correct 13 ms 14464 KB Output is correct
19 Correct 13 ms 14464 KB Output is correct
20 Correct 12 ms 14464 KB Output is correct
21 Correct 14 ms 14464 KB Output is correct
22 Correct 13 ms 14592 KB Output is correct
23 Correct 14 ms 14592 KB Output is correct
24 Correct 14 ms 14592 KB Output is correct
25 Correct 13 ms 14592 KB Output is correct
26 Correct 14 ms 14592 KB Output is correct
27 Correct 14 ms 14464 KB Output is correct
28 Correct 13 ms 14592 KB Output is correct
29 Correct 14 ms 14592 KB Output is correct
30 Correct 13 ms 14592 KB Output is correct
31 Correct 13 ms 14592 KB Output is correct
32 Correct 13 ms 14592 KB Output is correct
33 Correct 15 ms 14592 KB Output is correct
34 Correct 13 ms 14592 KB Output is correct
35 Correct 14 ms 14592 KB Output is correct
36 Correct 14 ms 14592 KB Output is correct
37 Correct 17 ms 14592 KB Output is correct
38 Correct 13 ms 14592 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 14464 KB Output is correct
2 Correct 12 ms 14464 KB Output is correct
3 Correct 12 ms 14464 KB Output is correct
4 Correct 13 ms 14464 KB Output is correct
5 Correct 12 ms 14464 KB Output is correct
6 Correct 12 ms 14464 KB Output is correct
7 Correct 12 ms 14464 KB Output is correct
8 Correct 12 ms 14464 KB Output is correct
9 Correct 12 ms 14464 KB Output is correct
10 Correct 12 ms 14464 KB Output is correct
11 Correct 12 ms 14464 KB Output is correct
12 Correct 12 ms 14464 KB Output is correct
13 Correct 12 ms 14464 KB Output is correct
14 Correct 12 ms 14464 KB Output is correct
15 Correct 13 ms 14464 KB Output is correct
16 Correct 12 ms 14464 KB Output is correct
17 Correct 12 ms 14464 KB Output is correct
18 Correct 13 ms 14464 KB Output is correct
19 Correct 125 ms 20728 KB Output is correct
20 Correct 135 ms 20728 KB Output is correct
21 Correct 134 ms 20856 KB Output is correct
22 Correct 138 ms 20832 KB Output is correct
23 Correct 168 ms 21216 KB Output is correct
24 Correct 134 ms 20856 KB Output is correct
25 Correct 112 ms 31160 KB Output is correct
26 Correct 78 ms 40444 KB Output is correct
27 Correct 250 ms 27512 KB Output is correct
28 Correct 330 ms 66704 KB Output is correct
29 Correct 318 ms 65528 KB Output is correct
30 Correct 224 ms 27512 KB Output is correct
31 Correct 230 ms 27512 KB Output is correct
32 Correct 263 ms 27768 KB Output is correct
33 Correct 253 ms 26872 KB Output is correct
34 Correct 392 ms 40568 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 14464 KB Output is correct
2 Correct 12 ms 14464 KB Output is correct
3 Correct 12 ms 14464 KB Output is correct
4 Correct 13 ms 14464 KB Output is correct
5 Correct 12 ms 14464 KB Output is correct
6 Correct 12 ms 14464 KB Output is correct
7 Correct 12 ms 14464 KB Output is correct
8 Correct 12 ms 14464 KB Output is correct
9 Correct 12 ms 14464 KB Output is correct
10 Correct 12 ms 14464 KB Output is correct
11 Correct 12 ms 14464 KB Output is correct
12 Correct 12 ms 14464 KB Output is correct
13 Correct 12 ms 14464 KB Output is correct
14 Correct 12 ms 14464 KB Output is correct
15 Correct 13 ms 14464 KB Output is correct
16 Correct 12 ms 14464 KB Output is correct
17 Correct 12 ms 14464 KB Output is correct
18 Correct 13 ms 14464 KB Output is correct
19 Correct 13 ms 14464 KB Output is correct
20 Correct 12 ms 14464 KB Output is correct
21 Correct 14 ms 14464 KB Output is correct
22 Correct 13 ms 14592 KB Output is correct
23 Correct 14 ms 14592 KB Output is correct
24 Correct 14 ms 14592 KB Output is correct
25 Correct 13 ms 14592 KB Output is correct
26 Correct 14 ms 14592 KB Output is correct
27 Correct 14 ms 14464 KB Output is correct
28 Correct 13 ms 14592 KB Output is correct
29 Correct 14 ms 14592 KB Output is correct
30 Correct 13 ms 14592 KB Output is correct
31 Correct 13 ms 14592 KB Output is correct
32 Correct 13 ms 14592 KB Output is correct
33 Correct 15 ms 14592 KB Output is correct
34 Correct 13 ms 14592 KB Output is correct
35 Correct 14 ms 14592 KB Output is correct
36 Correct 14 ms 14592 KB Output is correct
37 Correct 17 ms 14592 KB Output is correct
38 Correct 13 ms 14592 KB Output is correct
39 Correct 125 ms 20728 KB Output is correct
40 Correct 135 ms 20728 KB Output is correct
41 Correct 134 ms 20856 KB Output is correct
42 Correct 138 ms 20832 KB Output is correct
43 Correct 168 ms 21216 KB Output is correct
44 Correct 134 ms 20856 KB Output is correct
45 Correct 112 ms 31160 KB Output is correct
46 Correct 78 ms 40444 KB Output is correct
47 Correct 250 ms 27512 KB Output is correct
48 Correct 330 ms 66704 KB Output is correct
49 Correct 318 ms 65528 KB Output is correct
50 Correct 224 ms 27512 KB Output is correct
51 Correct 230 ms 27512 KB Output is correct
52 Correct 263 ms 27768 KB Output is correct
53 Correct 253 ms 26872 KB Output is correct
54 Correct 392 ms 40568 KB Output is correct
55 Correct 27 ms 15488 KB Output is correct
56 Correct 19 ms 14976 KB Output is correct
57 Correct 80 ms 20904 KB Output is correct
58 Correct 65 ms 20588 KB Output is correct
59 Correct 114 ms 40440 KB Output is correct
60 Correct 303 ms 65784 KB Output is correct
61 Correct 252 ms 29304 KB Output is correct
62 Correct 208 ms 27640 KB Output is correct
63 Correct 259 ms 27640 KB Output is correct
64 Correct 503 ms 36472 KB Output is correct
65 Correct 495 ms 40824 KB Output is correct
66 Correct 344 ms 63356 KB Output is correct
67 Correct 183 ms 28012 KB Output is correct
68 Correct 368 ms 39032 KB Output is correct
69 Correct 408 ms 43256 KB Output is correct
70 Correct 351 ms 38008 KB Output is correct