oj.uz

Submission #860037

# Submission time Handle Problem Language Result Execution time Memory
860037 2023-10-11T12:29:12 Z drome Race (IOI11_race) C++14
100 / 100
 518 ms 72676 KB 
#include "race.h"
#include <bits/stdc++.h>

using namespace std;


typedef long long ll;
typedef vector<ll> vi;
typedef pair<ll, ll> ii;
typedef vector<ii> vii;

ll n, k;
vector<set<ii>> al;
vi size;
vi attached;
vi pathmin;
vi pathminbk;
ll pmbk = 0;
vii paths;
ll mink = INT_MAX;

void calcsize(ll u, ll p) {
  // cout << "calcsize" << " " << u << " " << p << endl;
  attached.emplace_back(u);
  size[u] = 1;
  for (auto &[v, w]:al[u]) if (v != p) {
    calcsize(v, u);
    size[u] += size[v];
  }
}

ll centoid(ll s) {
  attached.clear();
  calcsize(s, -1);
  ll ans = s;
  ll mimasub = size[s];
  for (auto &u:attached) {
    ll masub = attached.size() - size[u];
    for (auto &[v, _]:al[u]) if (size[v] < size[u]) {
      masub = max(masub, size[v]);
    }
    if (masub < mimasub) {
      ans = u;
      mimasub = masub;
    }
  }
  return ans;
}


void dfs1(ll u, ll p, ll nume, ll lene) {
  if (lene > k) return;
  paths.emplace_back(nume, lene);
  for (auto &[v,w]:al[u]) if (v != p) {
    dfs1(v, u, nume+1, lene+w);
  }
}

void calcpaths(ll s) {
  ll u = centoid(s);
  // cout << "centoid is " << u << endl;
  for (auto &[v, w]:al[u]) {
    paths.clear();
    dfs1(v, u, 1, w);
    for (auto &[nume, lene]:paths) {
      if (pathminbk[k-lene] == pmbk) {
        // if (pathmin[k-lene] + nume < mink) cout << "CHANGED k = " << k << " lene = " << lene << endl;
        mink = min(mink, pathmin[k-lene] + nume);
        
      }
    }
    for (auto &[nume, lene]:paths) {
      if (pathminbk[lene] != pmbk) {
        pathmin[lene] = nume;
        pathminbk[lene] = pmbk;
      }
      pathmin[lene] = min(pathmin[lene], nume);
    }
  }

  for (auto &[v, w]:al[u]) {
    al[v].erase(ii(u, w));
    pmbk++;
    pathmin[0] = 0;
    pathminbk[0] = pmbk;
    calcpaths(v);
  }

}


int best_path(int N, int K, int H[][2], int L[])
{
  n = N;
  k = K;
  pathmin.assign(k+10, INT_MAX);
  pathmin[0] = 0;
  pathminbk.assign(k+10, 0);
  size.assign(n, 0);
  al.resize(n);
  for (int i=0;i<n-1;i++) {
    ll u = H[i][0];
    ll v = H[i][1];
    al[u].emplace(v, L[i]);
    al[v].emplace(u, L[i]);
  }
  calcpaths(0);
  // for (int i=0;i<=k;i++) {
  //   cout << "k = " << i << ": " << pathmin[i] << endl;
  // }
  // cout << mink << endl;
  if (mink > n-1) return -1;

  return mink;
}

Compilation message

race.cpp: In function 'void calcsize(ll, ll)':
race.cpp:26:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   26 |   for (auto &[v, w]:al[u]) if (v != p) {
      |              ^
race.cpp: In function 'll centoid(ll)':
race.cpp:39:16: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   39 |     for (auto &[v, _]:al[u]) if (size[v] < size[u]) {
      |                ^
race.cpp: In function 'void dfs1(ll, ll, ll, ll)':
race.cpp:54:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   54 |   for (auto &[v,w]:al[u]) if (v != p) {
      |              ^
race.cpp: In function 'void calcpaths(ll)':
race.cpp:62:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   62 |   for (auto &[v, w]:al[u]) {
      |              ^
race.cpp:65:16: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   65 |     for (auto &[nume, lene]:paths) {
      |                ^
race.cpp:72:16: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   72 |     for (auto &[nume, lene]:paths) {
      |                ^
race.cpp:81:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   81 |   for (auto &[v, w]:al[u]) {
      |              ^

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2648 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2488 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2648 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2488 KB Output is correct
19 Correct 1 ms 2392 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 1 ms 2652 KB Output is correct
22 Correct 5 ms 17064 KB Output is correct
23 Correct 4 ms 14428 KB Output is correct
24 Correct 4 ms 16076 KB Output is correct
25 Correct 4 ms 15704 KB Output is correct
26 Correct 3 ms 7772 KB Output is correct
27 Correct 4 ms 15196 KB Output is correct
28 Correct 2 ms 5724 KB Output is correct
29 Correct 3 ms 7772 KB Output is correct
30 Correct 3 ms 8284 KB Output is correct
31 Correct 4 ms 12892 KB Output is correct
32 Correct 4 ms 13608 KB Output is correct
33 Correct 4 ms 14940 KB Output is correct
34 Correct 4 ms 11868 KB Output is correct
35 Correct 4 ms 15196 KB Output is correct
36 Correct 4 ms 17244 KB Output is correct
37 Correct 5 ms 14940 KB Output is correct
38 Correct 3 ms 10588 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2648 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2488 KB Output is correct
19 Correct 150 ms 25156 KB Output is correct
20 Correct 138 ms 25040 KB Output is correct
21 Correct 225 ms 25828 KB Output is correct
22 Correct 141 ms 25732 KB Output is correct
23 Correct 107 ms 25300 KB Output is correct
24 Correct 88 ms 25300 KB Output is correct
25 Correct 147 ms 27604 KB Output is correct
26 Correct 89 ms 30924 KB Output is correct
27 Correct 252 ms 45472 KB Output is correct
28 Correct 328 ms 54832 KB Output is correct
29 Correct 342 ms 54112 KB Output is correct
30 Correct 268 ms 45508 KB Output is correct
31 Correct 258 ms 45488 KB Output is correct
32 Correct 316 ms 45596 KB Output is correct
33 Correct 307 ms 45512 KB Output is correct
34 Correct 260 ms 46536 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2648 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2488 KB Output is correct
19 Correct 1 ms 2392 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 1 ms 2652 KB Output is correct
22 Correct 5 ms 17064 KB Output is correct
23 Correct 4 ms 14428 KB Output is correct
24 Correct 4 ms 16076 KB Output is correct
25 Correct 4 ms 15704 KB Output is correct
26 Correct 3 ms 7772 KB Output is correct
27 Correct 4 ms 15196 KB Output is correct
28 Correct 2 ms 5724 KB Output is correct
29 Correct 3 ms 7772 KB Output is correct
30 Correct 3 ms 8284 KB Output is correct
31 Correct 4 ms 12892 KB Output is correct
32 Correct 4 ms 13608 KB Output is correct
33 Correct 4 ms 14940 KB Output is correct
34 Correct 4 ms 11868 KB Output is correct
35 Correct 4 ms 15196 KB Output is correct
36 Correct 4 ms 17244 KB Output is correct
37 Correct 5 ms 14940 KB Output is correct
38 Correct 3 ms 10588 KB Output is correct
39 Correct 150 ms 25156 KB Output is correct
40 Correct 138 ms 25040 KB Output is correct
41 Correct 225 ms 25828 KB Output is correct
42 Correct 141 ms 25732 KB Output is correct
43 Correct 107 ms 25300 KB Output is correct
44 Correct 88 ms 25300 KB Output is correct
45 Correct 147 ms 27604 KB Output is correct
46 Correct 89 ms 30924 KB Output is correct
47 Correct 252 ms 45472 KB Output is correct
48 Correct 328 ms 54832 KB Output is correct
49 Correct 342 ms 54112 KB Output is correct
50 Correct 268 ms 45508 KB Output is correct
51 Correct 258 ms 45488 KB Output is correct
52 Correct 316 ms 45596 KB Output is correct
53 Correct 307 ms 45512 KB Output is correct
54 Correct 260 ms 46536 KB Output is correct
55 Correct 12 ms 4768 KB Output is correct
56 Correct 10 ms 4548 KB Output is correct
57 Correct 82 ms 26336 KB Output is correct
58 Correct 58 ms 24784 KB Output is correct
59 Correct 94 ms 33736 KB Output is correct
60 Correct 462 ms 72676 KB Output is correct
61 Correct 265 ms 45836 KB Output is correct
62 Correct 297 ms 61244 KB Output is correct
63 Correct 368 ms 61128 KB Output is correct
64 Correct 518 ms 56996 KB Output is correct
65 Correct 325 ms 46700 KB Output is correct
66 Correct 400 ms 68448 KB Output is correct
67 Correct 314 ms 61840 KB Output is correct
68 Correct 390 ms 61116 KB Output is correct
69 Correct 469 ms 61644 KB Output is correct
70 Correct 368 ms 59448 KB Output is correct