oj.uz

답안 #857743

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
857743 2023-10-06T19:23:30 Z tigran 경주 (Race) (IOI11_race) C++17
100 / 100
 1258 ms 56416 KB 
#include <bits/stdc++.h>
#define pb push_back
#include "race.h"
#define endl "\n"
#define fastio cin.tie(0); ios_base::sync_with_stdio(false);
typedef long long ll;
using namespace std;
 
const int mod = 1e9 + 7;
const int MAXN = 2e5 + 5;
 
vector<pair<int, int> > adj[MAXN];
vector<int> sub(MAXN), vis(MAXN);
 
inline void subtreecalc(int node, int par){
  sub[node] = 1;
  for(auto itr: adj[node]){
    if(itr.first != par && !vis[itr.first]){
        subtreecalc(itr.first, node);
        sub[node] += sub[itr.first];
    }
  }
}
 
inline int find_centroid(int node, int par, int sz){
  for(auto itr: adj[node]){
    if(vis[itr.first] || itr.first == par) continue;
    if(sub[itr.first] > sz/2) return find_centroid(itr.first, node, sz);
  }
 
  return node;
}
 
inline void dfs(int node, int par, int depth, int len, map<int, int> &mpp){
  if(vis[node]) return;
  if(!mpp[depth]) mpp[depth] = len;
  else mpp[depth] = min(mpp[depth], len);
 
  for(auto itr: adj[node]){
    if(vis[itr.first] || itr.first == par) continue;
    dfs(itr.first, node, depth + itr.second, len + 1, mpp);
  }
}
 
bool compare(pair<int, int> p1, pair<int, int> p2){
  return (sub[p1.first] > sub[p2.first]);
}
 
int best_path(int N, int K, int H[][2], int L[]){
  for(int i = 0; i < N-1; i++){
    adj[H[i][0]].pb({H[i][1], L[i]});
    adj[H[i][1]].pb({H[i][0], L[i]});
  }
  int ans = 1e9;
  vector<int> roots, new_roots;
  roots.pb(0);
  int cnt = 0;
 
 while(cnt < N){
  for(auto i: roots) subtreecalc(i, i);
 
  for(auto i: roots){
    int ct = find_centroid(i, i, sub[i]);
    sort(adj[ct].begin(), adj[ct].end(), compare);
    int ind = 0;
    map<int, int> pre, now;
    while(ind < adj[ct].size()){
        if(vis[adj[ct][ind].first]){
            ind++;
            continue;
        }
        dfs(adj[ct][ind].first, ct, adj[ct][ind].second, 1, now);
        for(auto itr: now){
            if(pre[K - itr.first]) ans = min(ans, pre[K - itr.first] + now[itr.first]);
            if(itr.first == K) ans = min(ans, itr.second);
        }
        for(auto itr: now){
            if(!pre[itr.first] && itr.first != 0) pre[itr.first] = itr.second;
            else pre[itr.first] = min(pre[itr.first], now[itr.first]);
        }
        now.clear();
        ind++;
    }
 
    vis[ct] = 1;
    for(auto itr: adj[ct]){
        if(!vis[itr.first]) new_roots.pb(itr.first);
    }
    cnt++;
  }
  roots = new_roots;
  new_roots.clear();
 }
 
  if(ans == 1e9) return -1;
  else return ans;
}

Compilation message

race.cpp: In function 'int best_path(int, int, int (*)[2], int*)':
race.cpp:67:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |     while(ind < adj[ct].size()){
      |           ~~~~^~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 10332 KB Output is correct
2 Correct 2 ms 10332 KB Output is correct
3 Correct 2 ms 10332 KB Output is correct
4 Correct 3 ms 10372 KB Output is correct
5 Correct 2 ms 10332 KB Output is correct
6 Correct 2 ms 10332 KB Output is correct
7 Correct 2 ms 10332 KB Output is correct
8 Correct 3 ms 10332 KB Output is correct
9 Correct 3 ms 10332 KB Output is correct
10 Correct 2 ms 10584 KB Output is correct
11 Correct 2 ms 10332 KB Output is correct
12 Correct 2 ms 10332 KB Output is correct
13 Correct 2 ms 10168 KB Output is correct
14 Correct 2 ms 10328 KB Output is correct
15 Correct 2 ms 10332 KB Output is correct
16 Correct 2 ms 10328 KB Output is correct
17 Correct 2 ms 10332 KB Output is correct
18 Correct 2 ms 10332 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 10332 KB Output is correct
2 Correct 2 ms 10332 KB Output is correct
3 Correct 2 ms 10332 KB Output is correct
4 Correct 3 ms 10372 KB Output is correct
5 Correct 2 ms 10332 KB Output is correct
6 Correct 2 ms 10332 KB Output is correct
7 Correct 2 ms 10332 KB Output is correct
8 Correct 3 ms 10332 KB Output is correct
9 Correct 3 ms 10332 KB Output is correct
10 Correct 2 ms 10584 KB Output is correct
11 Correct 2 ms 10332 KB Output is correct
12 Correct 2 ms 10332 KB Output is correct
13 Correct 2 ms 10168 KB Output is correct
14 Correct 2 ms 10328 KB Output is correct
15 Correct 2 ms 10332 KB Output is correct
16 Correct 2 ms 10328 KB Output is correct
17 Correct 2 ms 10332 KB Output is correct
18 Correct 2 ms 10332 KB Output is correct
19 Correct 3 ms 10328 KB Output is correct
20 Correct 3 ms 10328 KB Output is correct
21 Correct 4 ms 10328 KB Output is correct
22 Correct 5 ms 10332 KB Output is correct
23 Correct 5 ms 10332 KB Output is correct
24 Correct 4 ms 10332 KB Output is correct
25 Correct 5 ms 10452 KB Output is correct
26 Correct 4 ms 10332 KB Output is correct
27 Correct 3 ms 10388 KB Output is correct
28 Correct 4 ms 10424 KB Output is correct
29 Correct 5 ms 10332 KB Output is correct
30 Correct 5 ms 10320 KB Output is correct
31 Correct 4 ms 10332 KB Output is correct
32 Correct 4 ms 10328 KB Output is correct
33 Correct 5 ms 10332 KB Output is correct
34 Correct 5 ms 10328 KB Output is correct
35 Correct 4 ms 10332 KB Output is correct
36 Correct 4 ms 10384 KB Output is correct
37 Correct 4 ms 10332 KB Output is correct
38 Correct 4 ms 10332 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 10332 KB Output is correct
2 Correct 2 ms 10332 KB Output is correct
3 Correct 2 ms 10332 KB Output is correct
4 Correct 3 ms 10372 KB Output is correct
5 Correct 2 ms 10332 KB Output is correct
6 Correct 2 ms 10332 KB Output is correct
7 Correct 2 ms 10332 KB Output is correct
8 Correct 3 ms 10332 KB Output is correct
9 Correct 3 ms 10332 KB Output is correct
10 Correct 2 ms 10584 KB Output is correct
11 Correct 2 ms 10332 KB Output is correct
12 Correct 2 ms 10332 KB Output is correct
13 Correct 2 ms 10168 KB Output is correct
14 Correct 2 ms 10328 KB Output is correct
15 Correct 2 ms 10332 KB Output is correct
16 Correct 2 ms 10328 KB Output is correct
17 Correct 2 ms 10332 KB Output is correct
18 Correct 2 ms 10332 KB Output is correct
19 Correct 217 ms 17660 KB Output is correct
20 Correct 216 ms 17864 KB Output is correct
21 Correct 201 ms 17964 KB Output is correct
22 Correct 210 ms 17980 KB Output is correct
23 Correct 340 ms 18424 KB Output is correct
24 Correct 177 ms 18636 KB Output is correct
25 Correct 169 ms 23280 KB Output is correct
26 Correct 77 ms 22908 KB Output is correct
27 Correct 329 ms 23412 KB Output is correct
28 Correct 1246 ms 56292 KB Output is correct
29 Correct 1141 ms 56168 KB Output is correct
30 Correct 378 ms 23608 KB Output is correct
31 Correct 331 ms 23380 KB Output is correct
32 Correct 366 ms 23704 KB Output is correct
33 Correct 546 ms 22496 KB Output is correct
34 Correct 1036 ms 44248 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 10332 KB Output is correct
2 Correct 2 ms 10332 KB Output is correct
3 Correct 2 ms 10332 KB Output is correct
4 Correct 3 ms 10372 KB Output is correct
5 Correct 2 ms 10332 KB Output is correct
6 Correct 2 ms 10332 KB Output is correct
7 Correct 2 ms 10332 KB Output is correct
8 Correct 3 ms 10332 KB Output is correct
9 Correct 3 ms 10332 KB Output is correct
10 Correct 2 ms 10584 KB Output is correct
11 Correct 2 ms 10332 KB Output is correct
12 Correct 2 ms 10332 KB Output is correct
13 Correct 2 ms 10168 KB Output is correct
14 Correct 2 ms 10328 KB Output is correct
15 Correct 2 ms 10332 KB Output is correct
16 Correct 2 ms 10328 KB Output is correct
17 Correct 2 ms 10332 KB Output is correct
18 Correct 2 ms 10332 KB Output is correct
19 Correct 3 ms 10328 KB Output is correct
20 Correct 3 ms 10328 KB Output is correct
21 Correct 4 ms 10328 KB Output is correct
22 Correct 5 ms 10332 KB Output is correct
23 Correct 5 ms 10332 KB Output is correct
24 Correct 4 ms 10332 KB Output is correct
25 Correct 5 ms 10452 KB Output is correct
26 Correct 4 ms 10332 KB Output is correct
27 Correct 3 ms 10388 KB Output is correct
28 Correct 4 ms 10424 KB Output is correct
29 Correct 5 ms 10332 KB Output is correct
30 Correct 5 ms 10320 KB Output is correct
31 Correct 4 ms 10332 KB Output is correct
32 Correct 4 ms 10328 KB Output is correct
33 Correct 5 ms 10332 KB Output is correct
34 Correct 5 ms 10328 KB Output is correct
35 Correct 4 ms 10332 KB Output is correct
36 Correct 4 ms 10384 KB Output is correct
37 Correct 4 ms 10332 KB Output is correct
38 Correct 4 ms 10332 KB Output is correct
39 Correct 217 ms 17660 KB Output is correct
40 Correct 216 ms 17864 KB Output is correct
41 Correct 201 ms 17964 KB Output is correct
42 Correct 210 ms 17980 KB Output is correct
43 Correct 340 ms 18424 KB Output is correct
44 Correct 177 ms 18636 KB Output is correct
45 Correct 169 ms 23280 KB Output is correct
46 Correct 77 ms 22908 KB Output is correct
47 Correct 329 ms 23412 KB Output is correct
48 Correct 1246 ms 56292 KB Output is correct
49 Correct 1141 ms 56168 KB Output is correct
50 Correct 378 ms 23608 KB Output is correct
51 Correct 331 ms 23380 KB Output is correct
52 Correct 366 ms 23704 KB Output is correct
53 Correct 546 ms 22496 KB Output is correct
54 Correct 1036 ms 44248 KB Output is correct
55 Correct 32 ms 11608 KB Output is correct
56 Correct 15 ms 10840 KB Output is correct
57 Correct 122 ms 18200 KB Output is correct
58 Correct 46 ms 18276 KB Output is correct
59 Correct 455 ms 31568 KB Output is correct
60 Correct 1196 ms 53712 KB Output is correct
61 Correct 415 ms 25852 KB Output is correct
62 Correct 330 ms 23676 KB Output is correct
63 Correct 403 ms 23832 KB Output is correct
64 Correct 1106 ms 34132 KB Output is correct
65 Correct 965 ms 42484 KB Output is correct
66 Correct 1258 ms 56416 KB Output is correct
67 Correct 103 ms 25536 KB Output is correct
68 Correct 545 ms 39612 KB Output is correct
69 Correct 520 ms 40108 KB Output is correct
70 Correct 524 ms 38912 KB Output is correct