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답안 #742240

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
742240 2023-05-16T00:06:38 Z beaboss 경주 (Race) (IOI11_race) C++14
100 / 100
 495 ms 111092 KB 
#include <bits/stdc++.h>

using namespace std;

#define s second
#define f first
#define pb push_back

typedef long long ll;

typedef pair<ll, ll> pii;
typedef vector<pii> vpii;

typedef vector<ll> vi;

#define FOR(i, a, b) for (ll i = (a); i<b; i++)

const ll MN = 3e5 + 10;

vpii adj[MN];
ll d[MN]; // from root in highways
ll d2[MN]; // from root in distance
ll k;
map<ll, ll> small[MN];
void dfs(ll cur = 0, ll dist = 0, ll dist2 = 0, ll p = -1) {
  // cout << cur << endl;
  d[cur]=dist;
  d2[cur]=dist2;

  small[cur][dist2]=dist;

  for (auto val: adj[cur]) {
    if (val.f != p) {
      dfs(val.f, dist + 1ll, dist2 + val.s, cur);
    }
  }
}



ll ans = 1e9;

void solve(ll cur, ll p=-1) {
  ll target = k + 2*d2[cur];
  for (auto val: adj[cur]) {
    if (val.f != p) {
      solve(val.f, cur);

      if (small[val.f].size() > small[cur].size()) swap(small[val.f], small[cur]);

      for (pii nx: small[val.f]) {
        if (small[cur].find(target - nx.f) != small[cur].end()) {
          ans = min(ans, small[cur][target - nx.f] + nx.s - 2*d[cur]);
        }
      }

      for (pii nx: small[val.f]) {
        if (small[cur].find(nx.f) == small[cur].end()) small[cur].insert(nx);
        else small[cur][nx.f]=min(small[cur][nx.f], nx.s);
      }
    }

  }


  
}



int best_path(int N, int K, int H[][2], int L[])
{

  k = K;
  FOR(i, 0, N-1) {
    adj[H[i][0]].pb({H[i][1], L[i]});
    adj[H[i][1]].pb({H[i][0], L[i]});
  }

  dfs();
  solve(0);
  if (ans == 1e9) ans = -1;
  return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 21460 KB Output is correct
2 Correct 13 ms 21512 KB Output is correct
3 Correct 12 ms 21444 KB Output is correct
4 Correct 14 ms 21460 KB Output is correct
5 Correct 13 ms 21452 KB Output is correct
6 Correct 13 ms 21460 KB Output is correct
7 Correct 13 ms 21420 KB Output is correct
8 Correct 12 ms 21460 KB Output is correct
9 Correct 14 ms 21508 KB Output is correct
10 Correct 11 ms 21496 KB Output is correct
11 Correct 10 ms 21388 KB Output is correct
12 Correct 11 ms 21424 KB Output is correct
13 Correct 12 ms 21460 KB Output is correct
14 Correct 11 ms 21484 KB Output is correct
15 Correct 11 ms 21508 KB Output is correct
16 Correct 11 ms 21508 KB Output is correct
17 Correct 11 ms 21460 KB Output is correct
18 Correct 13 ms 21460 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 21460 KB Output is correct
2 Correct 13 ms 21512 KB Output is correct
3 Correct 12 ms 21444 KB Output is correct
4 Correct 14 ms 21460 KB Output is correct
5 Correct 13 ms 21452 KB Output is correct
6 Correct 13 ms 21460 KB Output is correct
7 Correct 13 ms 21420 KB Output is correct
8 Correct 12 ms 21460 KB Output is correct
9 Correct 14 ms 21508 KB Output is correct
10 Correct 11 ms 21496 KB Output is correct
11 Correct 10 ms 21388 KB Output is correct
12 Correct 11 ms 21424 KB Output is correct
13 Correct 12 ms 21460 KB Output is correct
14 Correct 11 ms 21484 KB Output is correct
15 Correct 11 ms 21508 KB Output is correct
16 Correct 11 ms 21508 KB Output is correct
17 Correct 11 ms 21460 KB Output is correct
18 Correct 13 ms 21460 KB Output is correct
19 Correct 11 ms 21472 KB Output is correct
20 Correct 11 ms 21472 KB Output is correct
21 Correct 12 ms 21716 KB Output is correct
22 Correct 11 ms 21816 KB Output is correct
23 Correct 13 ms 21712 KB Output is correct
24 Correct 12 ms 21784 KB Output is correct
25 Correct 12 ms 21688 KB Output is correct
26 Correct 12 ms 21688 KB Output is correct
27 Correct 12 ms 21564 KB Output is correct
28 Correct 13 ms 21784 KB Output is correct
29 Correct 12 ms 21716 KB Output is correct
30 Correct 13 ms 21716 KB Output is correct
31 Correct 12 ms 21680 KB Output is correct
32 Correct 11 ms 21716 KB Output is correct
33 Correct 11 ms 21820 KB Output is correct
34 Correct 11 ms 21748 KB Output is correct
35 Correct 12 ms 21720 KB Output is correct
36 Correct 12 ms 21652 KB Output is correct
37 Correct 11 ms 21716 KB Output is correct
38 Correct 12 ms 21704 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 21460 KB Output is correct
2 Correct 13 ms 21512 KB Output is correct
3 Correct 12 ms 21444 KB Output is correct
4 Correct 14 ms 21460 KB Output is correct
5 Correct 13 ms 21452 KB Output is correct
6 Correct 13 ms 21460 KB Output is correct
7 Correct 13 ms 21420 KB Output is correct
8 Correct 12 ms 21460 KB Output is correct
9 Correct 14 ms 21508 KB Output is correct
10 Correct 11 ms 21496 KB Output is correct
11 Correct 10 ms 21388 KB Output is correct
12 Correct 11 ms 21424 KB Output is correct
13 Correct 12 ms 21460 KB Output is correct
14 Correct 11 ms 21484 KB Output is correct
15 Correct 11 ms 21508 KB Output is correct
16 Correct 11 ms 21508 KB Output is correct
17 Correct 11 ms 21460 KB Output is correct
18 Correct 13 ms 21460 KB Output is correct
19 Correct 154 ms 44876 KB Output is correct
20 Correct 141 ms 44824 KB Output is correct
21 Correct 137 ms 44632 KB Output is correct
22 Correct 144 ms 44144 KB Output is correct
23 Correct 176 ms 56972 KB Output is correct
24 Correct 139 ms 47060 KB Output is correct
25 Correct 125 ms 45684 KB Output is correct
26 Correct 66 ms 53836 KB Output is correct
27 Correct 240 ms 56688 KB Output is correct
28 Correct 359 ms 98752 KB Output is correct
29 Correct 346 ms 96972 KB Output is correct
30 Correct 238 ms 56740 KB Output is correct
31 Correct 244 ms 56648 KB Output is correct
32 Correct 335 ms 56708 KB Output is correct
33 Correct 283 ms 61604 KB Output is correct
34 Correct 416 ms 93612 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 21460 KB Output is correct
2 Correct 13 ms 21512 KB Output is correct
3 Correct 12 ms 21444 KB Output is correct
4 Correct 14 ms 21460 KB Output is correct
5 Correct 13 ms 21452 KB Output is correct
6 Correct 13 ms 21460 KB Output is correct
7 Correct 13 ms 21420 KB Output is correct
8 Correct 12 ms 21460 KB Output is correct
9 Correct 14 ms 21508 KB Output is correct
10 Correct 11 ms 21496 KB Output is correct
11 Correct 10 ms 21388 KB Output is correct
12 Correct 11 ms 21424 KB Output is correct
13 Correct 12 ms 21460 KB Output is correct
14 Correct 11 ms 21484 KB Output is correct
15 Correct 11 ms 21508 KB Output is correct
16 Correct 11 ms 21508 KB Output is correct
17 Correct 11 ms 21460 KB Output is correct
18 Correct 13 ms 21460 KB Output is correct
19 Correct 11 ms 21472 KB Output is correct
20 Correct 11 ms 21472 KB Output is correct
21 Correct 12 ms 21716 KB Output is correct
22 Correct 11 ms 21816 KB Output is correct
23 Correct 13 ms 21712 KB Output is correct
24 Correct 12 ms 21784 KB Output is correct
25 Correct 12 ms 21688 KB Output is correct
26 Correct 12 ms 21688 KB Output is correct
27 Correct 12 ms 21564 KB Output is correct
28 Correct 13 ms 21784 KB Output is correct
29 Correct 12 ms 21716 KB Output is correct
30 Correct 13 ms 21716 KB Output is correct
31 Correct 12 ms 21680 KB Output is correct
32 Correct 11 ms 21716 KB Output is correct
33 Correct 11 ms 21820 KB Output is correct
34 Correct 11 ms 21748 KB Output is correct
35 Correct 12 ms 21720 KB Output is correct
36 Correct 12 ms 21652 KB Output is correct
37 Correct 11 ms 21716 KB Output is correct
38 Correct 12 ms 21704 KB Output is correct
39 Correct 154 ms 44876 KB Output is correct
40 Correct 141 ms 44824 KB Output is correct
41 Correct 137 ms 44632 KB Output is correct
42 Correct 144 ms 44144 KB Output is correct
43 Correct 176 ms 56972 KB Output is correct
44 Correct 139 ms 47060 KB Output is correct
45 Correct 125 ms 45684 KB Output is correct
46 Correct 66 ms 53836 KB Output is correct
47 Correct 240 ms 56688 KB Output is correct
48 Correct 359 ms 98752 KB Output is correct
49 Correct 346 ms 96972 KB Output is correct
50 Correct 238 ms 56740 KB Output is correct
51 Correct 244 ms 56648 KB Output is correct
52 Correct 335 ms 56708 KB Output is correct
53 Correct 283 ms 61604 KB Output is correct
54 Correct 416 ms 93612 KB Output is correct
55 Correct 23 ms 24788 KB Output is correct
56 Correct 18 ms 23508 KB Output is correct
57 Correct 82 ms 42296 KB Output is correct
58 Correct 55 ms 35088 KB Output is correct
59 Correct 128 ms 60180 KB Output is correct
60 Correct 322 ms 97632 KB Output is correct
61 Correct 276 ms 60044 KB Output is correct
62 Correct 230 ms 56724 KB Output is correct
63 Correct 314 ms 56732 KB Output is correct
64 Correct 476 ms 111092 KB Output is correct
65 Correct 495 ms 108912 KB Output is correct
66 Correct 357 ms 92716 KB Output is correct
67 Correct 201 ms 49112 KB Output is correct
68 Correct 395 ms 72596 KB Output is correct
69 Correct 417 ms 77184 KB Output is correct
70 Correct 354 ms 70344 KB Output is correct