oj.uz

Submission #1004489

# Submission time Handle Problem Language Result Execution time Memory
1004489 2024-06-21T09:24:24 Z Gray Race (IOI11_race) C++17
21 / 100
 3000 ms 261968 KB 
#include<bits/stdc++.h>
#include "race.h"
using namespace std;
#define ll long long
#define ff first
#define ss second
#define ln "\n"
vector<pair<ll, pair<ll, ll>>> e;
vector<vector<ll>> A;
vector<bool> black;
vector<ll> sz;
ll n, k;
ll getsz(ll u, ll p){
  sz[u]=1;
  for (auto i:A[u]){
    if (black[i]) continue;
    ll v = e[i].ss.ff^e[i].ss.ss^u;
    if (v==p) continue;
    sz[u]+=getsz(v, u);
  }
  return sz[u];
}
void findcentroid(ll u, ll p, ll up, ll &centr, ll wsz){
  for (auto i:A[u]){
    if (black[i]) continue;
    ll v = e[i].ss.ff^e[i].ss.ss^u;
    if (v==p) continue;
    if (sz[v]>wsz/2) {findcentroid(v, u, up+1, centr, wsz); return;}
  }
  centr=u;
  return;
}
void dfs(ll u, ll p, map<ll, ll> &usg, ll level, ll dep){
  if (usg.count(level)) usg[level]=min(usg[level], dep);
  else usg[level]=dep;
  for (auto i:A[u]){
    ll v = e[i].ss.ff^e[i].ss.ss^u;
    if (v==p or black[i]) continue;
    dfs(v, u, usg, level+e[i].ff, dep+1);
  }
}
void cedfs(ll u, ll &mn, ll wsz){
  ll centr = -1;
  findcentroid(u,u, 0, centr, wsz);
  assert(centr!=-1);
  map<ll, ll> full, levs;
  for (auto i:A[u]){
    if (black[i]) continue;
    ll v = e[i].ss.ff^e[i].ss.ss^u;
    levs = map<ll, ll>();
    dfs(v, u, levs, e[i].ff, 1);
    for (auto [length, tim]:levs){
      // cout << length << "-" << tim << ' ';
      if (full.count(k-length)){
        mn=min(mn, full[k-length]+tim);
      }
      if (length==k){
        mn=min(mn, tim);
      }
    }
    // cout << ln;
    for (auto [length, tim]:levs){
      if (full.count(length)){
        full[length]=min(full[length], tim);
      }else{
        full[length]=tim;
      }
    }
  }
  for (auto i:A[u]){
    if (black[i]) continue;
    black[i]=1;
    ll v = e[i].ss.ff^e[i].ss.ss^u;
    cedfs(v, mn, getsz(v, v));
  }
}


int best_path(int N, int K, int H[][2], int L[])
{
  n = N; k=K;
  e.resize(N-1);
  A.resize(N);
  for (ll i=0; i<n-1; i++){
    A[H[i][0]].push_back(i);
    A[H[i][1]].push_back(i);
    e[i] = {L[i], {H[i][0], H[i][1]}};
  }
  black.resize(N);
  sz.resize(N);
  ll mn = 2e18;
  cedfs(0, mn, getsz(0, 0));
  return (mn==2e18?-1:mn);
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 860 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 860 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 1 ms 856 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 1 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 1 ms 860 KB Output is correct
17 Correct 1 ms 860 KB Output is correct
18 Correct 1 ms 860 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 860 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 860 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 1 ms 856 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 1 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 1 ms 860 KB Output is correct
17 Correct 1 ms 860 KB Output is correct
18 Correct 1 ms 860 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 2 ms 604 KB Output is correct
22 Correct 4 ms 1420 KB Output is correct
23 Correct 7 ms 2328 KB Output is correct
24 Correct 3 ms 1116 KB Output is correct
25 Correct 4 ms 856 KB Output is correct
26 Correct 4 ms 860 KB Output is correct
27 Correct 2 ms 600 KB Output is correct
28 Correct 3 ms 860 KB Output is correct
29 Correct 2 ms 604 KB Output is correct
30 Correct 2 ms 1044 KB Output is correct
31 Correct 3 ms 860 KB Output is correct
32 Correct 3 ms 860 KB Output is correct
33 Correct 4 ms 1116 KB Output is correct
34 Correct 29 ms 12676 KB Output is correct
35 Correct 36 ms 15900 KB Output is correct
36 Correct 39 ms 20060 KB Output is correct
37 Correct 15 ms 6748 KB Output is correct
38 Correct 12 ms 4408 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 860 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 860 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 1 ms 856 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 1 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 1 ms 860 KB Output is correct
17 Correct 1 ms 860 KB Output is correct
18 Correct 1 ms 860 KB Output is correct
19 Correct 451 ms 11352 KB Output is correct
20 Correct 487 ms 11308 KB Output is correct
21 Correct 343 ms 11080 KB Output is correct
22 Correct 255 ms 11088 KB Output is correct
23 Correct 406 ms 13008 KB Output is correct
24 Correct 155 ms 11092 KB Output is correct
25 Execution timed out 3073 ms 261968 KB Time limit exceeded
26 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 860 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 860 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 1 ms 856 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 1 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 1 ms 860 KB Output is correct
17 Correct 1 ms 860 KB Output is correct
18 Correct 1 ms 860 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 2 ms 604 KB Output is correct
22 Correct 4 ms 1420 KB Output is correct
23 Correct 7 ms 2328 KB Output is correct
24 Correct 3 ms 1116 KB Output is correct
25 Correct 4 ms 856 KB Output is correct
26 Correct 4 ms 860 KB Output is correct
27 Correct 2 ms 600 KB Output is correct
28 Correct 3 ms 860 KB Output is correct
29 Correct 2 ms 604 KB Output is correct
30 Correct 2 ms 1044 KB Output is correct
31 Correct 3 ms 860 KB Output is correct
32 Correct 3 ms 860 KB Output is correct
33 Correct 4 ms 1116 KB Output is correct
34 Correct 29 ms 12676 KB Output is correct
35 Correct 36 ms 15900 KB Output is correct
36 Correct 39 ms 20060 KB Output is correct
37 Correct 15 ms 6748 KB Output is correct
38 Correct 12 ms 4408 KB Output is correct
39 Correct 451 ms 11352 KB Output is correct
40 Correct 487 ms 11308 KB Output is correct
41 Correct 343 ms 11080 KB Output is correct
42 Correct 255 ms 11088 KB Output is correct
43 Correct 406 ms 13008 KB Output is correct
44 Correct 155 ms 11092 KB Output is correct
45 Execution timed out 3073 ms 261968 KB Time limit exceeded
46 Halted 0 ms 0 KB -