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답안 #891684

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
891684 2023-12-23T16:01:06 Z ind1v 꿈 (IOI13_dreaming) C++11
47 / 100
 57 ms 12928 KB 
#include <bits/stdc++.h>
#include "dreaming.h"

using namespace std;

const int N = 1e5 + 5;

struct info {
  int d, da, db;
  
  info() {}
  
  info(int _d, int _da, int _db) : d(_d), da(_da), db(_db) {}
};

info optimize(info u, info v) {
  return max(u.da, u.db) < max(v.da, v.db) ? u : v;
}

info merge(info u, info v, int w) {
  int dd[6] = {u.d, v.d, u.da + w + v.da, u.da + w + v.db, u.db + w + v.da, u.db + w + v.db};
  int mx = *max_element(dd, dd + 6);
  info res(mx, 2e9, 2e9);
  for (int i = 0; i < 6; i++) {
    if (dd[i] == mx) {
      if (i == 0) {
        res = optimize(res, info(mx, u.da, u.db));
      } else if (i == 1) {
        res = optimize(res, info(mx, v.da, v.db));
      } else if (i == 2) {
        res = optimize(res, info(mx, u.da, w + v.da));
        res = optimize(res, info(mx, w + u.da, v.da));
      } else if (i == 3) {
        res = optimize(res, info(mx, u.da, w + v.db));
        res = optimize(res, info(mx, w + u.da, v.db));
      } else if (i == 4) {
        res = optimize(res, info(mx, u.db, w + v.da));
        res = optimize(res, info(mx, w + u.db, v.da));
      } else if (i == 5) {
        res = optimize(res, info(mx, u.db, w + v.db));
        res = optimize(res, info(mx, w + u.db, v.db));
      }
    }
  }
  return res;
}

struct dsu {
  int lab[N];
  info fi[N];
  
  dsu() {
    memset(lab, -1, sizeof(lab));
    for (int i = 0; i < N; i++) {
      fi[i] = info(0, 0, 0);
    }
  }
  
  int find(int u) {
    return lab[u] < 0 ? u : lab[u] = find(lab[u]);
  }
  
  bool unite(int u, int v, int w) {
    if ((u = find(u)) == (v = find(v))) {
      return false;
    }
    if (lab[u] > lab[v]) {
      swap(u, v);
    }
    fi[u] = merge(fi[u], fi[v], w);
    lab[u] += lab[v];
    lab[v] = u;
    return true;
  }
};

vector<pair<int, int>> g[N];
dsu ds;
int d[N];
int da[N], db[N];

void process(int id) {
  queue<int> q;
  d[id] = 0;
  q.push(id);
  int mx = 0;
  int j = id;
  vector<int> nd;
  nd.emplace_back(id);
  while (!q.empty()) {
    int u = q.front();
    q.pop();
    for (pair<int, int> e : g[u]) {
      int v = e.first;
      int w = e.second;
      if (d[v] > d[u] + w) {
        nd.emplace_back(v);
        d[v] = d[u] + w;
        q.push(v);
        if (d[v] > mx) {
          mx = d[v];
          j = v;
        }
      }
    }
  }
  int a = j;
  for (int x : nd) {
    d[x] = 0x3f3f3f3f;
  }
  d[j] = 0;
  q.push(j);
  mx = 0;
  int k = j;
  while (!q.empty()) {
    int u = q.front();
    q.pop();
    for (pair<int, int> e : g[u]) {
      int v = e.first;
      int w = e.second;
      if (d[v] > d[u] + w) {
        d[v] = d[u] + w;
        q.push(v);
        if (d[v] > mx) {
          mx = d[v];
          k = v;
        }
      }
    }
  }
  int b = k;
  q.push(a);
  da[a] = 0;
  while (!q.empty()) {
    int u = q.front();
    q.pop();
    for (pair<int, int> e : g[u]) {
      int v = e.first;
      int w = e.second;
      if (da[v] > da[u] + w) {
        da[v] = da[u] + w;
        q.push(v);
      }
    }
  }
  q.push(b);
  db[b] = 0;
  while (!q.empty()) {
    int u = q.front();
    q.pop();
    for (pair<int, int> e : g[u]) {
      int v = e.first;
      int w = e.second;
      if (db[v] > db[u] + w) {
        db[v] = db[u] + w;
        q.push(v);
      }
    }
  }
  pair<int, int> opt = {2e9, 2e9};
  for (int i = 0; i < (int) nd.size(); i++) {
    if (max(da[nd[i]], db[nd[i]]) < max(opt.first, opt.second)) {
      opt = {da[nd[i]], db[nd[i]]};
    }
  }
  for (int i = 0; i < (int) nd.size() - 1; i++) {
    ds.unite(nd[i], nd[i + 1], 0);
  }
  int root = ds.find(nd.front());
  ds.fi[root] = info(mx, opt.first, opt.second);
}

int travelTime(int n, int m, int l, int a[], int b[], int t[]) {
  memset(d, 0x3f, sizeof(d));
  memset(da, 0x3f, sizeof(da));
  memset(db, 0x3f, sizeof(db));
  for (int i = 0; i < m; i++) {
    g[a[i]].emplace_back(b[i], t[i]);
    g[b[i]].emplace_back(a[i], t[i]);
  }
  for (int i = 0; i < n; i++) {
    if (d[i] == 0x3f3f3f3f) {
      process(i);
    }
  }
  vector<int> c;
  for (int i = 0; i < n; i++) {
    c.emplace_back(ds.find(i));
  }
  sort(c.begin(), c.end());
  c.erase(unique(c.begin(), c.end()), c.end());
  while (c.size() > 1) {
    ds.unite(c.back(), c[(int) c.size() - 2], l);
    int nc = ds.find(c.back());
    c.pop_back();
    c.pop_back();
    c.emplace_back(nc);
  }
  return ds.fi[ds.find(1)].d;
}

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 36 ms 10340 KB Output is correct
2 Correct 37 ms 11632 KB Output is correct
3 Correct 25 ms 9952 KB Output is correct
4 Correct 6 ms 7260 KB Output is correct
5 Correct 6 ms 7004 KB Output is correct
6 Correct 11 ms 7648 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 20 ms 8700 KB Output is correct
9 Correct 25 ms 9296 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 35 ms 10684 KB Output is correct
12 Correct 39 ms 10944 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 2 ms 6488 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6532 KB Output is correct
6 Correct 2 ms 6488 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6488 KB Output is correct
10 Correct 2 ms 6480 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6492 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6488 KB Output is correct
15 Correct 2 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6492 KB Output is correct
20 Correct 2 ms 6488 KB Output is correct
21 Correct 2 ms 6488 KB Output is correct
22 Correct 2 ms 6492 KB Output is correct
23 Correct 2 ms 6488 KB Output is correct
24 Correct 2 ms 6492 KB Output is correct
25 Correct 3 ms 6536 KB Output is correct

Subtask #3
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 36 ms 10340 KB Output is correct
2 Correct 37 ms 11632 KB Output is correct
3 Correct 25 ms 9952 KB Output is correct
4 Correct 6 ms 7260 KB Output is correct
5 Correct 6 ms 7004 KB Output is correct
6 Correct 11 ms 7648 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 20 ms 8700 KB Output is correct
9 Correct 25 ms 9296 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 35 ms 10684 KB Output is correct
12 Correct 39 ms 10944 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6488 KB Output is correct
15 Correct 2 ms 6488 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6532 KB Output is correct
19 Correct 2 ms 6488 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6488 KB Output is correct
23 Correct 2 ms 6480 KB Output is correct
24 Correct 2 ms 6492 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 2 ms 6488 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct
29 Correct 2 ms 6492 KB Output is correct
30 Correct 2 ms 6492 KB Output is correct
31 Correct 2 ms 6492 KB Output is correct
32 Correct 2 ms 6492 KB Output is correct
33 Correct 2 ms 6488 KB Output is correct
34 Correct 2 ms 6488 KB Output is correct
35 Correct 2 ms 6492 KB Output is correct
36 Correct 2 ms 6488 KB Output is correct
37 Correct 2 ms 6492 KB Output is correct
38 Correct 3 ms 6536 KB Output is correct
39 Correct 37 ms 11620 KB Output is correct
40 Correct 38 ms 11628 KB Output is correct
41 Correct 26 ms 9840 KB Output is correct
42 Correct 7 ms 7260 KB Output is correct
43 Correct 2 ms 6492 KB Output is correct
44 Correct 2 ms 6492 KB Output is correct
45 Correct 2 ms 6492 KB Output is correct
46 Correct 2 ms 6520 KB Output is correct
47 Correct 2 ms 6488 KB Output is correct
48 Correct 2 ms 6492 KB Output is correct
49 Correct 2 ms 6492 KB Output is correct
50 Correct 2 ms 6492 KB Output is correct
51 Correct 2 ms 6328 KB Output is correct
52 Correct 2 ms 6492 KB Output is correct
53 Correct 2 ms 6492 KB Output is correct
54 Correct 2 ms 6492 KB Output is correct
55 Correct 2 ms 6744 KB Output is correct
56 Correct 2 ms 6492 KB Output is correct
57 Correct 46 ms 12824 KB Output is correct
58 Correct 47 ms 12800 KB Output is correct
59 Correct 49 ms 12668 KB Output is correct
60 Correct 49 ms 12484 KB Output is correct
61 Correct 48 ms 12732 KB Output is correct
62 Correct 53 ms 12680 KB Output is correct
63 Correct 44 ms 12648 KB Output is correct
64 Correct 57 ms 12916 KB Output is correct
65 Correct 46 ms 12864 KB Output is correct
66 Correct 45 ms 12928 KB Output is correct
67 Correct 47 ms 12656 KB Output is correct
68 Correct 48 ms 12660 KB Output is correct
69 Correct 50 ms 12776 KB Output is correct
70 Correct 53 ms 12772 KB Output is correct
71 Correct 2 ms 6488 KB Output is correct
72 Correct 3 ms 6492 KB Output is correct
73 Correct 3 ms 6492 KB Output is correct
74 Correct 3 ms 6492 KB Output is correct
75 Correct 3 ms 6492 KB Output is correct
76 Correct 3 ms 6492 KB Output is correct
77 Correct 3 ms 6488 KB Output is correct
78 Correct 3 ms 6492 KB Output is correct
79 Correct 3 ms 6492 KB Output is correct
80 Correct 53 ms 12732 KB Output is correct
81 Correct 55 ms 12732 KB Output is correct
82 Correct 50 ms 12924 KB Output is correct
83 Correct 48 ms 12872 KB Output is correct
84 Correct 3 ms 6488 KB Output is correct
85 Correct 2 ms 6492 KB Output is correct
86 Correct 3 ms 6620 KB Output is correct
87 Correct 3 ms 6492 KB Output is correct
88 Correct 3 ms 6492 KB Output is correct
89 Correct 3 ms 6488 KB Output is correct
90 Correct 3 ms 6492 KB Output is correct
91 Correct 3 ms 6488 KB Output is correct
92 Correct 3 ms 6488 KB Output is correct
93 Correct 3 ms 6560 KB Output is correct
94 Correct 2 ms 6492 KB Output is correct
95 Correct 2 ms 6328 KB Output is correct
96 Correct 2 ms 6492 KB Output is correct
97 Correct 2 ms 6492 KB Output is correct
98 Correct 2 ms 6492 KB Output is correct
99 Correct 2 ms 6492 KB Output is correct
100 Correct 2 ms 6492 KB Output is correct
101 Correct 2 ms 6492 KB Output is correct
102 Correct 2 ms 6492 KB Output is correct
103 Correct 2 ms 6492 KB Output is correct
104 Correct 6 ms 7004 KB Output is correct
105 Correct 11 ms 7692 KB Output is correct
106 Correct 2 ms 6492 KB Output is correct
107 Correct 20 ms 8688 KB Output is correct
108 Correct 24 ms 9308 KB Output is correct
109 Correct 2 ms 6492 KB Output is correct
110 Correct 37 ms 10780 KB Output is correct
111 Correct 40 ms 11040 KB Output is correct
112 Correct 2 ms 6492 KB Output is correct
113 Correct 52 ms 12140 KB Output is correct

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 9184 KB Output is correct
2 Correct 25 ms 9256 KB Output is correct
3 Correct 25 ms 9184 KB Output is correct
4 Incorrect 25 ms 9248 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 2 ms 6488 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6532 KB Output is correct
6 Correct 2 ms 6488 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6488 KB Output is correct
10 Correct 2 ms 6480 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6492 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6488 KB Output is correct
15 Correct 2 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6492 KB Output is correct
20 Correct 2 ms 6488 KB Output is correct
21 Correct 2 ms 6488 KB Output is correct
22 Correct 2 ms 6492 KB Output is correct
23 Correct 2 ms 6488 KB Output is correct
24 Correct 2 ms 6492 KB Output is correct
25 Correct 3 ms 6536 KB Output is correct
26 Correct 2 ms 6488 KB Output is correct
27 Correct 3 ms 6492 KB Output is correct
28 Correct 3 ms 6492 KB Output is correct
29 Correct 2 ms 6492 KB Output is correct
30 Correct 3 ms 6492 KB Output is correct
31 Correct 3 ms 6488 KB Output is correct
32 Correct 2 ms 6536 KB Output is correct
33 Correct 3 ms 6492 KB Output is correct
34 Correct 3 ms 6492 KB Output is correct
35 Correct 2 ms 6492 KB Output is correct
36 Correct 2 ms 6528 KB Output is correct
37 Correct 2 ms 6460 KB Output is correct
38 Correct 2 ms 6492 KB Output is correct
39 Correct 2 ms 6304 KB Output is correct
40 Incorrect 2 ms 6492 KB Output isn't correct
41 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 36 ms 10340 KB Output is correct
2 Correct 37 ms 11632 KB Output is correct
3 Correct 25 ms 9952 KB Output is correct
4 Correct 6 ms 7260 KB Output is correct
5 Correct 6 ms 7004 KB Output is correct
6 Correct 11 ms 7648 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 20 ms 8700 KB Output is correct
9 Correct 25 ms 9296 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 35 ms 10684 KB Output is correct
12 Correct 39 ms 10944 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6488 KB Output is correct
15 Correct 2 ms 6488 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6532 KB Output is correct
19 Correct 2 ms 6488 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6488 KB Output is correct
23 Correct 2 ms 6480 KB Output is correct
24 Correct 2 ms 6492 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 2 ms 6488 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct
29 Correct 2 ms 6492 KB Output is correct
30 Correct 2 ms 6492 KB Output is correct
31 Correct 2 ms 6492 KB Output is correct
32 Correct 2 ms 6492 KB Output is correct
33 Correct 2 ms 6488 KB Output is correct
34 Correct 2 ms 6488 KB Output is correct
35 Correct 2 ms 6492 KB Output is correct
36 Correct 2 ms 6488 KB Output is correct
37 Correct 2 ms 6492 KB Output is correct
38 Correct 3 ms 6536 KB Output is correct
39 Correct 37 ms 11620 KB Output is correct
40 Correct 38 ms 11628 KB Output is correct
41 Correct 26 ms 9840 KB Output is correct
42 Correct 7 ms 7260 KB Output is correct
43 Correct 2 ms 6492 KB Output is correct
44 Correct 2 ms 6492 KB Output is correct
45 Correct 2 ms 6492 KB Output is correct
46 Correct 2 ms 6520 KB Output is correct
47 Correct 2 ms 6488 KB Output is correct
48 Correct 2 ms 6492 KB Output is correct
49 Correct 2 ms 6492 KB Output is correct
50 Correct 2 ms 6492 KB Output is correct
51 Correct 2 ms 6328 KB Output is correct
52 Correct 2 ms 6492 KB Output is correct
53 Correct 2 ms 6492 KB Output is correct
54 Correct 2 ms 6492 KB Output is correct
55 Correct 2 ms 6744 KB Output is correct
56 Correct 2 ms 6492 KB Output is correct
57 Correct 46 ms 12824 KB Output is correct
58 Correct 47 ms 12800 KB Output is correct
59 Correct 49 ms 12668 KB Output is correct
60 Correct 49 ms 12484 KB Output is correct
61 Correct 48 ms 12732 KB Output is correct
62 Correct 53 ms 12680 KB Output is correct
63 Correct 44 ms 12648 KB Output is correct
64 Correct 57 ms 12916 KB Output is correct
65 Correct 46 ms 12864 KB Output is correct
66 Correct 45 ms 12928 KB Output is correct
67 Correct 47 ms 12656 KB Output is correct
68 Correct 48 ms 12660 KB Output is correct
69 Correct 50 ms 12776 KB Output is correct
70 Correct 53 ms 12772 KB Output is correct
71 Correct 2 ms 6488 KB Output is correct
72 Correct 3 ms 6492 KB Output is correct
73 Correct 3 ms 6492 KB Output is correct
74 Correct 3 ms 6492 KB Output is correct
75 Correct 3 ms 6492 KB Output is correct
76 Correct 3 ms 6492 KB Output is correct
77 Correct 3 ms 6488 KB Output is correct
78 Correct 3 ms 6492 KB Output is correct
79 Correct 3 ms 6492 KB Output is correct
80 Correct 53 ms 12732 KB Output is correct
81 Correct 55 ms 12732 KB Output is correct
82 Correct 50 ms 12924 KB Output is correct
83 Correct 48 ms 12872 KB Output is correct
84 Correct 3 ms 6488 KB Output is correct
85 Correct 2 ms 6492 KB Output is correct
86 Correct 3 ms 6620 KB Output is correct
87 Correct 3 ms 6492 KB Output is correct
88 Correct 3 ms 6492 KB Output is correct
89 Correct 3 ms 6488 KB Output is correct
90 Correct 3 ms 6492 KB Output is correct
91 Correct 3 ms 6488 KB Output is correct
92 Correct 3 ms 6488 KB Output is correct
93 Correct 3 ms 6560 KB Output is correct
94 Correct 2 ms 6492 KB Output is correct
95 Correct 2 ms 6328 KB Output is correct
96 Correct 2 ms 6492 KB Output is correct
97 Correct 2 ms 6492 KB Output is correct
98 Correct 2 ms 6492 KB Output is correct
99 Correct 2 ms 6492 KB Output is correct
100 Correct 2 ms 6492 KB Output is correct
101 Correct 2 ms 6492 KB Output is correct
102 Correct 2 ms 6492 KB Output is correct
103 Correct 2 ms 6492 KB Output is correct
104 Correct 6 ms 7004 KB Output is correct
105 Correct 11 ms 7692 KB Output is correct
106 Correct 2 ms 6492 KB Output is correct
107 Correct 20 ms 8688 KB Output is correct
108 Correct 24 ms 9308 KB Output is correct
109 Correct 2 ms 6492 KB Output is correct
110 Correct 37 ms 10780 KB Output is correct
111 Correct 40 ms 11040 KB Output is correct
112 Correct 2 ms 6492 KB Output is correct
113 Correct 52 ms 12140 KB Output is correct
114 Correct 24 ms 9184 KB Output is correct
115 Correct 25 ms 9256 KB Output is correct
116 Correct 25 ms 9184 KB Output is correct
117 Incorrect 25 ms 9248 KB Output isn't correct
118 Halted 0 ms 0 KB -