oj.uz

답안 #720166

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
720166 2023-04-07T14:07:45 Z marvinthang 경주 (Race) (IOI11_race) C++17
100 / 100
 405 ms 36124 KB 
/******************************
*    author : @marvinthang    *
*    date : 15 / 01 / 2022    *
******************************/
 
#include "race.h"
#include <bits/stdc++.h>
 
using namespace std;
 
#define  superspeed  ios_base::sync_with_stdio(false); cin.tie(nullptr); //cout.tie(nullptr);
#define  file(name)  if (fopen (name".inp", "r") ) { freopen (name".inp", "r", stdin); freopen (name".out", "w", stdout); }
#define REP(i, a, b)  for (__typeof(a) i = (a) - ((a) > (b)); i != (b) - ((a) > (b)); i += ((a) > (b) ? -1 : 1))
#define FOR(i, a, b)  for (__typeof(a) i = (a); i != (b) + ((a) > (b) ? -1 : 1); i += ((a) > (b) ? -1 : 1))
 
template <class U, class V> ostream & operator << (ostream& out, const pair<U, V> &p) { return out << '(' << p.first << ", " << p.second << ')'; }
template <class T> ostream & operator << (ostream &out, const vector<T> &vt) { out << '{'; for (size_t i = 0; i + 1 < vt.size(); i++) out << vt[i] << ", "; if (!vt.empty()) out << vt.back(); return out << '}'; }
void minimize(int &a, int b) { if (a > b) a = b; }
const       int MOD = 1e9 + 7;
const     double PI = 3.1415926535897932384626433832795; // acos(-1.0); atan(-1.0);
const     int dir[] = {0, 1, 0, -1, 0}; // {0, 1, 1, -1, -1, 1, 0, -1, 0};
const  long long oo = 1e18;
const       int MAX = 2e5 + 5;
 
int N, K;
vector <pair <int, int>> adj[MAX];
int minPath[MAX * 10], newPath[MAX * 5], res;
vector <int> save, save2;
bool used[MAX];
 
void calc(int u, int par, int depth, int weight) {
    if (weight > K) return;
    res = min(res, minPath[K - weight] + depth);
    newPath[weight] = min(newPath[weight], depth);
    save.push_back(weight);
    save2.push_back(weight);
    for (pair <int, int> &x: adj[u]) {
        int v = x.second, w = x.first;
        if (v == par || used[v]) continue;
        calc(v, u, depth + 1, weight + w);
    }
}
 
int sizes[MAX];
 
int calcSize(int u, int par) {
    sizes[u] = 1;
    for (pair <int, int> &x: adj[u]) {
        int v = x.second;
        if (v == par || used[v]) continue;
        sizes[u] += calcSize(v, u);
    }
    return sizes[u];
}
 
int findCentroid(int u, int par, int n) {
    for (pair <int, int> &x: adj[u]) {
        int v = x.second;
        if (v == par || used[v]) continue;
        if (sizes[v] > n / 2) return findCentroid(v, u, n);
    }
    return u;
}
 
void solve(int u) {
    int n = calcSize(u, 0);
    int centroid = findCentroid(u, 0, n);
    used[centroid] = true;
    save.clear();
    for (pair <int, int> &x: adj[centroid]) {
        int v = x.second, w = x.first;
        if (used[v]) continue;
        calc(v, centroid, 1, w);
        for (int &x: save2) {
            minPath[x] = min(minPath[x], newPath[x]);
            newPath[x] = N + 1;
        }
        save2.clear();
    }
    res = min(res, minPath[K]);
    for (int &x: save) minPath[x] = N + 1;
    for (pair <int, int> &x: adj[centroid]) {
        int v = x.second;
        if (!used[v]) solve(v);
    }
}
 
int best_path(int n, int k, int h[][2], int l[]) {
    N = n; K = k;
    for (int i = 0; i < N - 1; ++i) {
        int u = h[i][0], v = h[i][1], w = l[i];
        ++u; ++v;
        adj[u].push_back( make_pair(w, v) );
        adj[v].push_back( make_pair(w, u) );
    }
    res = 1e9;
    fill(minPath, minPath + 1 + K, N + 1);
    fill(newPath, newPath + 1 + K, N + 1);
    solve(1);
    if (res > N) res = -1;
    return res;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 5012 KB Output is correct
4 Correct 3 ms 5020 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 4 ms 5004 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 5020 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5016 KB Output is correct
14 Correct 3 ms 5016 KB Output is correct
15 Correct 4 ms 5016 KB Output is correct
16 Correct 3 ms 5016 KB Output is correct
17 Correct 3 ms 5008 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 5012 KB Output is correct
4 Correct 3 ms 5020 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 4 ms 5004 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 5020 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5016 KB Output is correct
14 Correct 3 ms 5016 KB Output is correct
15 Correct 4 ms 5016 KB Output is correct
16 Correct 3 ms 5016 KB Output is correct
17 Correct 3 ms 5008 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 5012 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 4 ms 5076 KB Output is correct
22 Correct 7 ms 12244 KB Output is correct
23 Correct 7 ms 10964 KB Output is correct
24 Correct 9 ms 11860 KB Output is correct
25 Correct 6 ms 11604 KB Output is correct
26 Correct 5 ms 7636 KB Output is correct
27 Correct 7 ms 11348 KB Output is correct
28 Correct 4 ms 6612 KB Output is correct
29 Correct 5 ms 7636 KB Output is correct
30 Correct 5 ms 7892 KB Output is correct
31 Correct 6 ms 10196 KB Output is correct
32 Correct 6 ms 10580 KB Output is correct
33 Correct 7 ms 11220 KB Output is correct
34 Correct 6 ms 9684 KB Output is correct
35 Correct 9 ms 11348 KB Output is correct
36 Correct 10 ms 12316 KB Output is correct
37 Correct 7 ms 11348 KB Output is correct
38 Correct 6 ms 9044 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 5012 KB Output is correct
4 Correct 3 ms 5020 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 4 ms 5004 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 5020 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5016 KB Output is correct
14 Correct 3 ms 5016 KB Output is correct
15 Correct 4 ms 5016 KB Output is correct
16 Correct 3 ms 5016 KB Output is correct
17 Correct 3 ms 5008 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 106 ms 10752 KB Output is correct
20 Correct 104 ms 10736 KB Output is correct
21 Correct 142 ms 11104 KB Output is correct
22 Correct 124 ms 11412 KB Output is correct
23 Correct 77 ms 10984 KB Output is correct
24 Correct 50 ms 10804 KB Output is correct
25 Correct 132 ms 13548 KB Output is correct
26 Correct 92 ms 17264 KB Output is correct
27 Correct 156 ms 16224 KB Output is correct
28 Correct 310 ms 27456 KB Output is correct
29 Correct 231 ms 26616 KB Output is correct
30 Correct 180 ms 16300 KB Output is correct
31 Correct 159 ms 16252 KB Output is correct
32 Correct 192 ms 16404 KB Output is correct
33 Correct 202 ms 15156 KB Output is correct
34 Correct 188 ms 15040 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 3 ms 5012 KB Output is correct
4 Correct 3 ms 5020 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 3 ms 4948 KB Output is correct
7 Correct 4 ms 5004 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 5020 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 5016 KB Output is correct
14 Correct 3 ms 5016 KB Output is correct
15 Correct 4 ms 5016 KB Output is correct
16 Correct 3 ms 5016 KB Output is correct
17 Correct 3 ms 5008 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 5012 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 4 ms 5076 KB Output is correct
22 Correct 7 ms 12244 KB Output is correct
23 Correct 7 ms 10964 KB Output is correct
24 Correct 9 ms 11860 KB Output is correct
25 Correct 6 ms 11604 KB Output is correct
26 Correct 5 ms 7636 KB Output is correct
27 Correct 7 ms 11348 KB Output is correct
28 Correct 4 ms 6612 KB Output is correct
29 Correct 5 ms 7636 KB Output is correct
30 Correct 5 ms 7892 KB Output is correct
31 Correct 6 ms 10196 KB Output is correct
32 Correct 6 ms 10580 KB Output is correct
33 Correct 7 ms 11220 KB Output is correct
34 Correct 6 ms 9684 KB Output is correct
35 Correct 9 ms 11348 KB Output is correct
36 Correct 10 ms 12316 KB Output is correct
37 Correct 7 ms 11348 KB Output is correct
38 Correct 6 ms 9044 KB Output is correct
39 Correct 106 ms 10752 KB Output is correct
40 Correct 104 ms 10736 KB Output is correct
41 Correct 142 ms 11104 KB Output is correct
42 Correct 124 ms 11412 KB Output is correct
43 Correct 77 ms 10984 KB Output is correct
44 Correct 50 ms 10804 KB Output is correct
45 Correct 132 ms 13548 KB Output is correct
46 Correct 92 ms 17264 KB Output is correct
47 Correct 156 ms 16224 KB Output is correct
48 Correct 310 ms 27456 KB Output is correct
49 Correct 231 ms 26616 KB Output is correct
50 Correct 180 ms 16300 KB Output is correct
51 Correct 159 ms 16252 KB Output is correct
52 Correct 192 ms 16404 KB Output is correct
53 Correct 202 ms 15156 KB Output is correct
54 Correct 188 ms 15040 KB Output is correct
55 Correct 11 ms 5796 KB Output is correct
56 Correct 11 ms 5796 KB Output is correct
57 Correct 78 ms 11904 KB Output is correct
58 Correct 37 ms 11864 KB Output is correct
59 Correct 96 ms 18660 KB Output is correct
60 Correct 405 ms 36124 KB Output is correct
61 Correct 158 ms 16624 KB Output is correct
62 Correct 196 ms 25040 KB Output is correct
63 Correct 232 ms 25040 KB Output is correct
64 Correct 365 ms 21432 KB Output is correct
65 Correct 199 ms 16172 KB Output is correct
66 Correct 346 ms 32428 KB Output is correct
67 Correct 134 ms 26144 KB Output is correct
68 Correct 219 ms 24832 KB Output is correct
69 Correct 228 ms 24712 KB Output is correct
70 Correct 234 ms 24220 KB Output is correct