oj.uz

답안 #797860

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
797860 2023-07-30T03:51:02 Z asdfgrace 경주 (Race) (IOI11_race) C++17
100 / 100
 374 ms 97276 KB 
#include <bits/stdc++.h>
#include "race.h"
using namespace std;
#define DEBUG(x) //x
#define A(x) DEBUG(assert(x))
#define PRINT(x) DEBUG(cerr << x)
#define PV(x) DEBUG(cerr << #x << " = " << x << '\n')
#define PV2(x) DEBUG(cerr << #x << " = " << x.first << ',' << x.second << '\n')
#define PAR(x) DEBUG(PRINT(#x << " = { "); for (auto y : x) PRINT(y << ' '); PRINT("}\n");)
#define PAR2(x) DEBUG(PRINT(#x << " = { "); for (auto [y, z] : x) PRINT(y << ',' << z << "  "); PRINT("}\n");)
#define PAR2D(x) DEBUG(PRINT(#x << ":\n"); for (auto arr : x) {PAR(arr);} PRINT('\n'));
typedef long long i64;
const int INF = 1000000007; //998244353;

int n, k, ans;
vector<i64> pref;
vector<int> sub, dep;
vector<vector<pair<int, i64>>> edges;
vector<map<i64, int>> paths;

void dfs1(int node, int par) {
  for (auto [next, wt] : edges[node]) {
    if (next == par) continue;
    pref[next] = pref[node] + wt;
    dep[next] = dep[node] + 1;
    dfs1(next, node);
    sub[node] += sub[next];
  }
}

void dfs2(int node, int par) {
  int heavy = -1, mx = -1;
  for (auto [next, wt] : edges[node]) {
    if (next == par) continue;
    if (sub[next] > mx) {
      mx = sub[next];
      heavy = next;
    }
  }
  for (auto [next, wt] : edges[node]) {
    if (next == par || next == heavy) continue;
    dfs2(next, node);
  }
  if (heavy != -1) {
    dfs2(heavy, node);
    swap(paths[heavy], paths[node]);
  }
  if (!paths[node].count(pref[node]) || paths[node][pref[node]] > dep[node]) {
    paths[node][pref[node]] = dep[node];
  }
  for (auto [next, wt] : edges[node]) {
    if (next == par || next == heavy) continue;
    for (auto [s, d] : paths[next]) {
      if (paths[node].count(k + 2 * pref[node] - s)) {
        ans = min(ans, d + paths[node][k + 2 * pref[node] - s] - 2 * dep[node]);
      }  
    }
    for (auto [s, d] : paths[next]) {
      if (!paths[node].count(s) || paths[node][s] >= d) {
        paths[node][s] = d;
      }
    }
  }
  if (paths[node].count(k + pref[node])) {
    ans = min(ans, paths[node][k + pref[node]] - dep[node]);
  }
  PV(node); PAR2(paths[node]);
}

int best_path(int N, int K, int H[][2], int L[]) {
  n = N;
  k = K;
  edges.resize(n);
  for (int i = 0; i < n - 1; ++i) {
    edges[H[i][0]].emplace_back(H[i][1], L[i]);
    edges[H[i][1]].emplace_back(H[i][0], L[i]);
  }
  pref.resize(n, 0); sub.resize(n, 1); dep.resize(n, 0);
  dfs1(0, 0);
  paths.resize(n); ans = INF;
  dfs2(0, 0);
  return (ans == INF ? -1 : ans);
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 308 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 308 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 304 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 308 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 308 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 596 KB Output is correct
23 Correct 1 ms 596 KB Output is correct
24 Correct 1 ms 596 KB Output is correct
25 Correct 1 ms 596 KB Output is correct
26 Correct 1 ms 596 KB Output is correct
27 Correct 1 ms 468 KB Output is correct
28 Correct 2 ms 596 KB Output is correct
29 Correct 1 ms 576 KB Output is correct
30 Correct 1 ms 596 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 1 ms 596 KB Output is correct
33 Correct 1 ms 704 KB Output is correct
34 Correct 2 ms 596 KB Output is correct
35 Correct 1 ms 596 KB Output is correct
36 Correct 1 ms 596 KB Output is correct
37 Correct 1 ms 468 KB Output is correct
38 Correct 1 ms 596 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 308 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 308 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 97 ms 27664 KB Output is correct
20 Correct 94 ms 27656 KB Output is correct
21 Correct 87 ms 27596 KB Output is correct
22 Correct 97 ms 27700 KB Output is correct
23 Correct 128 ms 41424 KB Output is correct
24 Correct 98 ms 33464 KB Output is correct
25 Correct 79 ms 26668 KB Output is correct
26 Correct 47 ms 34940 KB Output is correct
27 Correct 156 ms 46336 KB Output is correct
28 Correct 221 ms 82260 KB Output is correct
29 Correct 222 ms 80388 KB Output is correct
30 Correct 153 ms 46228 KB Output is correct
31 Correct 159 ms 46216 KB Output is correct
32 Correct 217 ms 46368 KB Output is correct
33 Correct 184 ms 45152 KB Output is correct
34 Correct 271 ms 77984 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 308 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 308 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 596 KB Output is correct
23 Correct 1 ms 596 KB Output is correct
24 Correct 1 ms 596 KB Output is correct
25 Correct 1 ms 596 KB Output is correct
26 Correct 1 ms 596 KB Output is correct
27 Correct 1 ms 468 KB Output is correct
28 Correct 2 ms 596 KB Output is correct
29 Correct 1 ms 576 KB Output is correct
30 Correct 1 ms 596 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 1 ms 596 KB Output is correct
33 Correct 1 ms 704 KB Output is correct
34 Correct 2 ms 596 KB Output is correct
35 Correct 1 ms 596 KB Output is correct
36 Correct 1 ms 596 KB Output is correct
37 Correct 1 ms 468 KB Output is correct
38 Correct 1 ms 596 KB Output is correct
39 Correct 97 ms 27664 KB Output is correct
40 Correct 94 ms 27656 KB Output is correct
41 Correct 87 ms 27596 KB Output is correct
42 Correct 97 ms 27700 KB Output is correct
43 Correct 128 ms 41424 KB Output is correct
44 Correct 98 ms 33464 KB Output is correct
45 Correct 79 ms 26668 KB Output is correct
46 Correct 47 ms 34940 KB Output is correct
47 Correct 156 ms 46336 KB Output is correct
48 Correct 221 ms 82260 KB Output is correct
49 Correct 222 ms 80388 KB Output is correct
50 Correct 153 ms 46228 KB Output is correct
51 Correct 159 ms 46216 KB Output is correct
52 Correct 217 ms 46368 KB Output is correct
53 Correct 184 ms 45152 KB Output is correct
54 Correct 271 ms 77984 KB Output is correct
55 Correct 12 ms 4052 KB Output is correct
56 Correct 6 ms 2748 KB Output is correct
57 Correct 54 ms 26564 KB Output is correct
58 Correct 46 ms 22048 KB Output is correct
59 Correct 69 ms 41136 KB Output is correct
60 Correct 218 ms 80932 KB Output is correct
61 Correct 179 ms 49816 KB Output is correct
62 Correct 159 ms 46196 KB Output is correct
63 Correct 203 ms 46448 KB Output is correct
64 Correct 374 ms 96548 KB Output is correct
65 Correct 365 ms 97276 KB Output is correct
66 Correct 234 ms 76380 KB Output is correct
67 Correct 169 ms 45288 KB Output is correct
68 Correct 291 ms 64324 KB Output is correct
69 Correct 283 ms 64800 KB Output is correct
70 Correct 269 ms 61372 KB Output is correct