oj.uz

답안 #299072

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
299072 2020-09-14T13:00:06 Z erd1 경주 (Race) (IOI11_race) C++14
100 / 100
 1734 ms 44280 KB 
#include "race.h"

#include<bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define all(x) (x).begin(), (x).end()
#define pb push_back
typedef int64_t lld;
typedef pair<int, int> pii;

/*
struct node;
vector<node*> nodes;
struct node{
  node *L = 0, *R = 0;
  lld l, r, mid;
  int val = 0;
  node(lld ll, lld rr) : l(ll), r(rr), mid((l+r)/2) {}
  node(*node n){ L = n->L, R = n->R, l = n->l, r = n->r, mid = n->mid, val = n->val + 1; }
  node* update(lld x){
    node* n = new node(this);
    if(l == r)return n;
    if(x <= mid){
      if(!n->L) n->L = new node(l, mid);
      return n->L->update(x);
    }else{
      if(!n->R) n->R = new node(mid+1, r);
      return n->R->update(x);
    }
  }
};
*/

vector<vector<pii>> G;

int getSize(int i, int p){
  int sz = 1;
  for(auto x: G[i])if(x.ff != p)sz += getSize(x.ff, i);
  return sz;
}

int getCent(int i, int p, int n){
  int sz = 1; bool fl = true;
  for(auto x : G[i])
    if(x.ff != p){
      auto r = getCent(x.ff, i, n);
      if(r >= 0)return r;
      r = -r;
      if(r > n/2)fl = false;
      sz += r;
    }
  if(n-sz > n/2)fl = false;
  if(fl)return i;
  else return -sz;
}

map<int, int> deps, tdeps;

void dfs(int i, int p, int d, int c){
  if(!deps[d])deps[d] = c;
  else deps[d] = min(deps[d], c);
  for(auto x : G[i])
    if(x.ff != p)
      dfs(x.ff, i, d+x.ss, c+1);
}

int process(int r, int targ){
  //cout << r << endl;
  deps.clear(); tdeps.clear(); tdeps[0] = 1;
  int ans = INT_MAX;
  for(auto x: G[r]){
    G[x.ff].erase(remove(all(G[x.ff]), make_pair(r, x.ss)), G[x.ff].end());
    dfs(x.ff, r, x.ss, 2);
    for(auto i: deps)
      if(tdeps.find(targ-i.ff) != tdeps.end())
        ans = min(ans, tdeps[targ-i.ff]+i.ss-1);
    for(auto i: deps)
      if(!tdeps[i.ff])tdeps[i.ff] = i.ss;
      else tdeps[i.ff] = min(tdeps[i.ff], i.ss);
    deps.clear();
  }
  G[r].resize(0);
  return ans;
}



int best_path(int N, int K, int H[][2], int L[]) {
  G.resize(N);
  for(int i = 0; i < N-1; i++)G[H[i][0]].pb({H[i][1], L[i]}), G[H[i][1]].pb({H[i][0], L[i]});
  int ans = INT_MAX;
  for(int i = 0; i < N; i++)while(G[i].size())ans = min(ans, process(getCent(i, i, getSize(i, i)), K));
  return ans == INT_MAX?-1:(ans-1);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 3 ms 384 KB Output is correct
22 Correct 3 ms 524 KB Output is correct
23 Correct 0 ms 640 KB Output is correct
24 Correct 3 ms 512 KB Output is correct
25 Correct 3 ms 640 KB Output is correct
26 Correct 3 ms 512 KB Output is correct
27 Correct 2 ms 384 KB Output is correct
28 Correct 3 ms 512 KB Output is correct
29 Correct 4 ms 512 KB Output is correct
30 Correct 3 ms 512 KB Output is correct
31 Correct 4 ms 512 KB Output is correct
32 Correct 3 ms 512 KB Output is correct
33 Correct 3 ms 512 KB Output is correct
34 Correct 4 ms 512 KB Output is correct
35 Correct 4 ms 512 KB Output is correct
36 Correct 3 ms 512 KB Output is correct
37 Correct 3 ms 512 KB Output is correct
38 Correct 3 ms 512 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 447 ms 8568 KB Output is correct
20 Correct 376 ms 8568 KB Output is correct
21 Correct 356 ms 8568 KB Output is correct
22 Correct 322 ms 8684 KB Output is correct
23 Correct 495 ms 8824 KB Output is correct
24 Correct 226 ms 8696 KB Output is correct
25 Correct 258 ms 13176 KB Output is correct
26 Correct 123 ms 15864 KB Output is correct
27 Correct 506 ms 16248 KB Output is correct
28 Correct 1630 ms 44280 KB Output is correct
29 Correct 1653 ms 43256 KB Output is correct
30 Correct 498 ms 16120 KB Output is correct
31 Correct 513 ms 16376 KB Output is correct
32 Correct 644 ms 16120 KB Output is correct
33 Correct 843 ms 14968 KB Output is correct
34 Correct 1543 ms 26616 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 3 ms 384 KB Output is correct
22 Correct 3 ms 524 KB Output is correct
23 Correct 0 ms 640 KB Output is correct
24 Correct 3 ms 512 KB Output is correct
25 Correct 3 ms 640 KB Output is correct
26 Correct 3 ms 512 KB Output is correct
27 Correct 2 ms 384 KB Output is correct
28 Correct 3 ms 512 KB Output is correct
29 Correct 4 ms 512 KB Output is correct
30 Correct 3 ms 512 KB Output is correct
31 Correct 4 ms 512 KB Output is correct
32 Correct 3 ms 512 KB Output is correct
33 Correct 3 ms 512 KB Output is correct
34 Correct 4 ms 512 KB Output is correct
35 Correct 4 ms 512 KB Output is correct
36 Correct 3 ms 512 KB Output is correct
37 Correct 3 ms 512 KB Output is correct
38 Correct 3 ms 512 KB Output is correct
39 Correct 447 ms 8568 KB Output is correct
40 Correct 376 ms 8568 KB Output is correct
41 Correct 356 ms 8568 KB Output is correct
42 Correct 322 ms 8684 KB Output is correct
43 Correct 495 ms 8824 KB Output is correct
44 Correct 226 ms 8696 KB Output is correct
45 Correct 258 ms 13176 KB Output is correct
46 Correct 123 ms 15864 KB Output is correct
47 Correct 506 ms 16248 KB Output is correct
48 Correct 1630 ms 44280 KB Output is correct
49 Correct 1653 ms 43256 KB Output is correct
50 Correct 498 ms 16120 KB Output is correct
51 Correct 513 ms 16376 KB Output is correct
52 Correct 644 ms 16120 KB Output is correct
53 Correct 843 ms 14968 KB Output is correct
54 Correct 1543 ms 26616 KB Output is correct
55 Correct 34 ms 1536 KB Output is correct
56 Correct 19 ms 1152 KB Output is correct
57 Correct 176 ms 8896 KB Output is correct
58 Correct 63 ms 8812 KB Output is correct
59 Correct 564 ms 21752 KB Output is correct
60 Correct 1686 ms 42872 KB Output is correct
61 Correct 572 ms 17400 KB Output is correct
62 Correct 496 ms 16248 KB Output is correct
63 Correct 632 ms 16192 KB Output is correct
64 Correct 1734 ms 22392 KB Output is correct
65 Correct 1482 ms 25732 KB Output is correct
66 Correct 1704 ms 40548 KB Output is correct
67 Correct 193 ms 16232 KB Output is correct
68 Correct 883 ms 24184 KB Output is correct
69 Correct 898 ms 24440 KB Output is correct
70 Correct 805 ms 23036 KB Output is correct