oj.uz

답안 #687718

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
687718 2023-01-26T21:48:42 Z Bliznetc 경주 (Race) (IOI11_race) C++17
100 / 100
 409 ms 35516 KB 
#include <bits/stdc++.h>
#include "race.h"
 
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-O3")
#pragma GCC target("avx2")
 
using namespace std;
 
#define pb push_back
#define sz size()
#define all(x) x.begin(), x.end()
#define F first
#define S second
 
typedef pair < int, int > pii;
typedef vector < int >  vi;
typedef vector < vi >  vvi;
 
const int N = 200200, A = 1000001;
vector <vector <pii> > g(N);
int _sz[N], used[N];
int mn[A];
 
void calc_sz (int v, int pr) {
    _sz[v] = 1;
    for (auto i : g[v]) {
        int to = i.F;
        if (used[to] || to == pr) {
            continue;
        }
        calc_sz(to, v);
        _sz[v] += _sz[to];
    }
}
 
int get_centroid (int v, int pr, int n) {
    for (auto i : g[v]) {
        int to = i.F;
        if (!used[to] && to != pr && _sz[to] > n / 2) {
            return get_centroid(to, v, n);
        }
    }
    return v;
}
 
int ans = 1e9;
vector <pii> vec;
void dfs (int v, int w, int pr, int d, int k) {
    if (w > k) {
        return;
    }
    int need = k - w;
    if (need == 0) {
        ans = min(ans, d);
    }
    if (mn[need] != 1e9) {
        ans = min(ans, mn[need] + d);
    }
    vec.pb({w, d});
    for (auto i : g[v]) {
        int to = i.F, w1 = i.S;
        if (used[to] || to == pr) {
            continue;
        }
        dfs (to, w + w1, v, d + 1, k);
    }
}
 
void calc_ans (int c, int k) {
    calc_sz(c, c);
    int v = get_centroid(c, c, _sz[c]);
    used[v] = 1;
 
    vector <pii> cur;
    for (auto i : g[v]) {
        int to = i.F, w = i.S;
        if (used[to]) {
            continue;
        }
        dfs (to, w, v, 1, k);
        for(auto j : vec) {
            mn[j.F] = min(mn[j.F], j.S);
            cur.pb(j);
        }
        vec.clear();
    }
 
    for (auto i : cur) {
        mn[i.F] = 1e9;
    }
 
    for (auto i : g[v]) {
        int to = i.F;
        if (used[to]) {
            continue;
        }
        calc_ans(to, k);
    }
}
 
int best_path (int N, int K, int h[][2], int l[]) {
    int n = N;
    int k = K;
    for (int i = 0; i < n - 1; i++) {
        int u = h[i][0], v = h[i][1], w = l[i];
        g[u].pb({v, w});
        g[v].pb({u, w});
    }
 
    for (int i = 0; i < A; i++) {
        mn[i] = 1e9;
    }
 
    calc_ans(0, k);
 
    if (ans == 1e9) {
        ans = -1;
    }
    return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 8916 KB Output is correct
2 Correct 5 ms 8916 KB Output is correct
3 Correct 5 ms 8916 KB Output is correct
4 Correct 4 ms 8916 KB Output is correct
5 Correct 5 ms 8916 KB Output is correct
6 Correct 4 ms 8916 KB Output is correct
7 Correct 4 ms 8916 KB Output is correct
8 Correct 4 ms 8916 KB Output is correct
9 Correct 5 ms 8916 KB Output is correct
10 Correct 4 ms 8916 KB Output is correct
11 Correct 4 ms 8916 KB Output is correct
12 Correct 5 ms 8916 KB Output is correct
13 Correct 5 ms 8872 KB Output is correct
14 Correct 4 ms 8916 KB Output is correct
15 Correct 4 ms 8916 KB Output is correct
16 Correct 4 ms 8916 KB Output is correct
17 Correct 5 ms 8916 KB Output is correct
18 Correct 4 ms 8916 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 8916 KB Output is correct
2 Correct 5 ms 8916 KB Output is correct
3 Correct 5 ms 8916 KB Output is correct
4 Correct 4 ms 8916 KB Output is correct
5 Correct 5 ms 8916 KB Output is correct
6 Correct 4 ms 8916 KB Output is correct
7 Correct 4 ms 8916 KB Output is correct
8 Correct 4 ms 8916 KB Output is correct
9 Correct 5 ms 8916 KB Output is correct
10 Correct 4 ms 8916 KB Output is correct
11 Correct 4 ms 8916 KB Output is correct
12 Correct 5 ms 8916 KB Output is correct
13 Correct 5 ms 8872 KB Output is correct
14 Correct 4 ms 8916 KB Output is correct
15 Correct 4 ms 8916 KB Output is correct
16 Correct 4 ms 8916 KB Output is correct
17 Correct 5 ms 8916 KB Output is correct
18 Correct 4 ms 8916 KB Output is correct
19 Correct 4 ms 8916 KB Output is correct
20 Correct 4 ms 8916 KB Output is correct
21 Correct 5 ms 8916 KB Output is correct
22 Correct 5 ms 9016 KB Output is correct
23 Correct 5 ms 8916 KB Output is correct
24 Correct 5 ms 8916 KB Output is correct
25 Correct 5 ms 9044 KB Output is correct
26 Correct 5 ms 8916 KB Output is correct
27 Correct 5 ms 8916 KB Output is correct
28 Correct 6 ms 9004 KB Output is correct
29 Correct 5 ms 9044 KB Output is correct
30 Correct 5 ms 9044 KB Output is correct
31 Correct 5 ms 9044 KB Output is correct
32 Correct 5 ms 9044 KB Output is correct
33 Correct 6 ms 9044 KB Output is correct
34 Correct 5 ms 8916 KB Output is correct
35 Correct 5 ms 9004 KB Output is correct
36 Correct 7 ms 8916 KB Output is correct
37 Correct 6 ms 9044 KB Output is correct
38 Correct 5 ms 9044 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 8916 KB Output is correct
2 Correct 5 ms 8916 KB Output is correct
3 Correct 5 ms 8916 KB Output is correct
4 Correct 4 ms 8916 KB Output is correct
5 Correct 5 ms 8916 KB Output is correct
6 Correct 4 ms 8916 KB Output is correct
7 Correct 4 ms 8916 KB Output is correct
8 Correct 4 ms 8916 KB Output is correct
9 Correct 5 ms 8916 KB Output is correct
10 Correct 4 ms 8916 KB Output is correct
11 Correct 4 ms 8916 KB Output is correct
12 Correct 5 ms 8916 KB Output is correct
13 Correct 5 ms 8872 KB Output is correct
14 Correct 4 ms 8916 KB Output is correct
15 Correct 4 ms 8916 KB Output is correct
16 Correct 4 ms 8916 KB Output is correct
17 Correct 5 ms 8916 KB Output is correct
18 Correct 4 ms 8916 KB Output is correct
19 Correct 110 ms 14888 KB Output is correct
20 Correct 120 ms 16172 KB Output is correct
21 Correct 119 ms 16812 KB Output is correct
22 Correct 111 ms 17660 KB Output is correct
23 Correct 75 ms 16220 KB Output is correct
24 Correct 62 ms 16076 KB Output is correct
25 Correct 111 ms 17216 KB Output is correct
26 Correct 89 ms 22084 KB Output is correct
27 Correct 160 ms 23444 KB Output is correct
28 Correct 234 ms 28768 KB Output is correct
29 Correct 231 ms 28236 KB Output is correct
30 Correct 174 ms 23484 KB Output is correct
31 Correct 158 ms 23376 KB Output is correct
32 Correct 188 ms 23360 KB Output is correct
33 Correct 232 ms 22232 KB Output is correct
34 Correct 175 ms 22860 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 8916 KB Output is correct
2 Correct 5 ms 8916 KB Output is correct
3 Correct 5 ms 8916 KB Output is correct
4 Correct 4 ms 8916 KB Output is correct
5 Correct 5 ms 8916 KB Output is correct
6 Correct 4 ms 8916 KB Output is correct
7 Correct 4 ms 8916 KB Output is correct
8 Correct 4 ms 8916 KB Output is correct
9 Correct 5 ms 8916 KB Output is correct
10 Correct 4 ms 8916 KB Output is correct
11 Correct 4 ms 8916 KB Output is correct
12 Correct 5 ms 8916 KB Output is correct
13 Correct 5 ms 8872 KB Output is correct
14 Correct 4 ms 8916 KB Output is correct
15 Correct 4 ms 8916 KB Output is correct
16 Correct 4 ms 8916 KB Output is correct
17 Correct 5 ms 8916 KB Output is correct
18 Correct 4 ms 8916 KB Output is correct
19 Correct 4 ms 8916 KB Output is correct
20 Correct 4 ms 8916 KB Output is correct
21 Correct 5 ms 8916 KB Output is correct
22 Correct 5 ms 9016 KB Output is correct
23 Correct 5 ms 8916 KB Output is correct
24 Correct 5 ms 8916 KB Output is correct
25 Correct 5 ms 9044 KB Output is correct
26 Correct 5 ms 8916 KB Output is correct
27 Correct 5 ms 8916 KB Output is correct
28 Correct 6 ms 9004 KB Output is correct
29 Correct 5 ms 9044 KB Output is correct
30 Correct 5 ms 9044 KB Output is correct
31 Correct 5 ms 9044 KB Output is correct
32 Correct 5 ms 9044 KB Output is correct
33 Correct 6 ms 9044 KB Output is correct
34 Correct 5 ms 8916 KB Output is correct
35 Correct 5 ms 9004 KB Output is correct
36 Correct 7 ms 8916 KB Output is correct
37 Correct 6 ms 9044 KB Output is correct
38 Correct 5 ms 9044 KB Output is correct
39 Correct 110 ms 14888 KB Output is correct
40 Correct 120 ms 16172 KB Output is correct
41 Correct 119 ms 16812 KB Output is correct
42 Correct 111 ms 17660 KB Output is correct
43 Correct 75 ms 16220 KB Output is correct
44 Correct 62 ms 16076 KB Output is correct
45 Correct 111 ms 17216 KB Output is correct
46 Correct 89 ms 22084 KB Output is correct
47 Correct 160 ms 23444 KB Output is correct
48 Correct 234 ms 28768 KB Output is correct
49 Correct 231 ms 28236 KB Output is correct
50 Correct 174 ms 23484 KB Output is correct
51 Correct 158 ms 23376 KB Output is correct
52 Correct 188 ms 23360 KB Output is correct
53 Correct 232 ms 22232 KB Output is correct
54 Correct 175 ms 22860 KB Output is correct
55 Correct 12 ms 9812 KB Output is correct
56 Correct 12 ms 9772 KB Output is correct
57 Correct 78 ms 17696 KB Output is correct
58 Correct 36 ms 16896 KB Output is correct
59 Correct 95 ms 22128 KB Output is correct
60 Correct 355 ms 35516 KB Output is correct
61 Correct 187 ms 23792 KB Output is correct
62 Correct 186 ms 25032 KB Output is correct
63 Correct 224 ms 24968 KB Output is correct
64 Correct 409 ms 27708 KB Output is correct
65 Correct 208 ms 24196 KB Output is correct
66 Correct 315 ms 27628 KB Output is correct
67 Correct 101 ms 26272 KB Output is correct
68 Correct 226 ms 26400 KB Output is correct
69 Correct 220 ms 26460 KB Output is correct
70 Correct 223 ms 25680 KB Output is correct