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답안 #1025985

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1025985 2024-07-17T12:14:47 Z PVSekhar 경주 (Race) (IOI11_race) C++14
100 / 100
 2115 ms 85204 KB 
#include <bits/stdc++.h>
using namespace std; 
#define ll long long
// const ll MOD = 998244353;
const ll MOD = 1e9 + 7;
const ll NN = 2e5 + 2;
const ll KK = 1e6 + 2;

ll n, k, ans = NN;
vector<ll> is_dead(NN, 0), cnt(KK, -1), cnt1(KK, -1), sz(NN);
vector<vector<ll>> edges(NN);
map<pair<ll,ll>, ll> w;
set<ll> s, s1;

void comp_sz (ll node, ll parent) {
    sz[node] = 1;
    for (ll child : edges[node]) {
        if (child == parent || is_dead[child]) continue;
        comp_sz(child, node);
        sz[node] += sz[child];
    }
}

void dfs(ll node, ll parent, ll dist, ll lvl) {
    if (dist < KK) s1.insert(dist), cnt1[dist] = (cnt1[dist] == -1 ? lvl : min(cnt1[dist], lvl));
    for (ll child : edges[node]) {
        if (child == parent || is_dead[child]) continue;
        dfs(child, node, dist + w[make_pair(child, node)], lvl + 1);
    }
}

void find_cent (ll node, ll parent, ll size) {
    for (ll child : edges[node]) {
        if (child == parent || is_dead[child]) continue;
        if (sz[child] * 2 > size) {
            find_cent(child, node, size);
            return;
        }
    }
    s.insert(0);
    cnt[0] = 0;
    for (ll child : edges[node]) {
        if (is_dead[child]) continue;
        dfs(child, node, w[make_pair(child, node)], 1);
        for (ll x : s1) {
            if (s.find(k - x) != s.end()) ans = min(ans, cnt1[x] + cnt[k - x]);
        }
        for (ll x : s1) {
            s.insert(x);
            cnt[x] = (cnt[x] == -1 ? cnt1[x] : min(cnt1[x], cnt[x]));
            cnt1[x] = -1;
        }
        s1.clear();
    }
    for (ll x : s) {
        cnt[x] = -1;
    }
    s.clear();
    is_dead[node] = 1;
    for (ll child : edges[node]) {
        if (is_dead[child]) continue;
        comp_sz(child, node);
        find_cent(child, node, sz[child]);
    }
}

int best_path(int N, int K, int H[][2], int L[]){
    n = N, k = K;
    for (int i = 0; i < n - 1; i++) {
        H[i][0]++, H[i][1]++;
        edges[H[i][0]].push_back(H[i][1]);
        edges[H[i][1]].push_back(H[i][0]);
    }
    for (int i = 0; i < n - 1; i++) {
        w[make_pair(H[i][0], H[i][1])] = L[i];
        w[make_pair(H[i][1], H[i][0])] = L[i];
    }
    is_dead[0] = 1;
    comp_sz(1, 0);
    find_cent(1, 0, n);
    if (ans == NN) ans = -1;
    return ans;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 23900 KB Output is correct
2 Correct 6 ms 23900 KB Output is correct
3 Correct 10 ms 23896 KB Output is correct
4 Correct 8 ms 23900 KB Output is correct
5 Correct 9 ms 23896 KB Output is correct
6 Correct 6 ms 23900 KB Output is correct
7 Correct 6 ms 23900 KB Output is correct
8 Correct 7 ms 23952 KB Output is correct
9 Correct 7 ms 23896 KB Output is correct
10 Correct 7 ms 23900 KB Output is correct
11 Correct 7 ms 23876 KB Output is correct
12 Correct 7 ms 23864 KB Output is correct
13 Correct 7 ms 23900 KB Output is correct
14 Correct 7 ms 23900 KB Output is correct
15 Correct 6 ms 23900 KB Output is correct
16 Correct 6 ms 23900 KB Output is correct
17 Correct 6 ms 23900 KB Output is correct
18 Correct 10 ms 23832 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 23900 KB Output is correct
2 Correct 6 ms 23900 KB Output is correct
3 Correct 10 ms 23896 KB Output is correct
4 Correct 8 ms 23900 KB Output is correct
5 Correct 9 ms 23896 KB Output is correct
6 Correct 6 ms 23900 KB Output is correct
7 Correct 6 ms 23900 KB Output is correct
8 Correct 7 ms 23952 KB Output is correct
9 Correct 7 ms 23896 KB Output is correct
10 Correct 7 ms 23900 KB Output is correct
11 Correct 7 ms 23876 KB Output is correct
12 Correct 7 ms 23864 KB Output is correct
13 Correct 7 ms 23900 KB Output is correct
14 Correct 7 ms 23900 KB Output is correct
15 Correct 6 ms 23900 KB Output is correct
16 Correct 6 ms 23900 KB Output is correct
17 Correct 6 ms 23900 KB Output is correct
18 Correct 10 ms 23832 KB Output is correct
19 Correct 7 ms 23904 KB Output is correct
20 Correct 7 ms 23900 KB Output is correct
21 Correct 9 ms 23900 KB Output is correct
22 Correct 11 ms 23960 KB Output is correct
23 Correct 11 ms 23896 KB Output is correct
24 Correct 8 ms 23904 KB Output is correct
25 Correct 10 ms 24152 KB Output is correct
26 Correct 9 ms 24156 KB Output is correct
27 Correct 10 ms 23900 KB Output is correct
28 Correct 10 ms 23960 KB Output is correct
29 Correct 13 ms 24156 KB Output is correct
30 Correct 10 ms 24100 KB Output is correct
31 Correct 9 ms 24156 KB Output is correct
32 Correct 9 ms 24172 KB Output is correct
33 Correct 10 ms 24152 KB Output is correct
34 Correct 9 ms 23928 KB Output is correct
35 Correct 10 ms 24064 KB Output is correct
36 Correct 10 ms 24148 KB Output is correct
37 Correct 9 ms 24156 KB Output is correct
38 Correct 9 ms 24096 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 23900 KB Output is correct
2 Correct 6 ms 23900 KB Output is correct
3 Correct 10 ms 23896 KB Output is correct
4 Correct 8 ms 23900 KB Output is correct
5 Correct 9 ms 23896 KB Output is correct
6 Correct 6 ms 23900 KB Output is correct
7 Correct 6 ms 23900 KB Output is correct
8 Correct 7 ms 23952 KB Output is correct
9 Correct 7 ms 23896 KB Output is correct
10 Correct 7 ms 23900 KB Output is correct
11 Correct 7 ms 23876 KB Output is correct
12 Correct 7 ms 23864 KB Output is correct
13 Correct 7 ms 23900 KB Output is correct
14 Correct 7 ms 23900 KB Output is correct
15 Correct 6 ms 23900 KB Output is correct
16 Correct 6 ms 23900 KB Output is correct
17 Correct 6 ms 23900 KB Output is correct
18 Correct 10 ms 23832 KB Output is correct
19 Correct 537 ms 41448 KB Output is correct
20 Correct 498 ms 42224 KB Output is correct
21 Correct 488 ms 42064 KB Output is correct
22 Correct 442 ms 42576 KB Output is correct
23 Correct 658 ms 42868 KB Output is correct
24 Correct 328 ms 42580 KB Output is correct
25 Correct 559 ms 48544 KB Output is correct
26 Correct 239 ms 47696 KB Output is correct
27 Correct 496 ms 60500 KB Output is correct
28 Correct 2105 ms 74452 KB Output is correct
29 Correct 2115 ms 74904 KB Output is correct
30 Correct 521 ms 60892 KB Output is correct
31 Correct 496 ms 61008 KB Output is correct
32 Correct 897 ms 60756 KB Output is correct
33 Correct 1304 ms 60152 KB Output is correct
34 Correct 1032 ms 60148 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 23900 KB Output is correct
2 Correct 6 ms 23900 KB Output is correct
3 Correct 10 ms 23896 KB Output is correct
4 Correct 8 ms 23900 KB Output is correct
5 Correct 9 ms 23896 KB Output is correct
6 Correct 6 ms 23900 KB Output is correct
7 Correct 6 ms 23900 KB Output is correct
8 Correct 7 ms 23952 KB Output is correct
9 Correct 7 ms 23896 KB Output is correct
10 Correct 7 ms 23900 KB Output is correct
11 Correct 7 ms 23876 KB Output is correct
12 Correct 7 ms 23864 KB Output is correct
13 Correct 7 ms 23900 KB Output is correct
14 Correct 7 ms 23900 KB Output is correct
15 Correct 6 ms 23900 KB Output is correct
16 Correct 6 ms 23900 KB Output is correct
17 Correct 6 ms 23900 KB Output is correct
18 Correct 10 ms 23832 KB Output is correct
19 Correct 7 ms 23904 KB Output is correct
20 Correct 7 ms 23900 KB Output is correct
21 Correct 9 ms 23900 KB Output is correct
22 Correct 11 ms 23960 KB Output is correct
23 Correct 11 ms 23896 KB Output is correct
24 Correct 8 ms 23904 KB Output is correct
25 Correct 10 ms 24152 KB Output is correct
26 Correct 9 ms 24156 KB Output is correct
27 Correct 10 ms 23900 KB Output is correct
28 Correct 10 ms 23960 KB Output is correct
29 Correct 13 ms 24156 KB Output is correct
30 Correct 10 ms 24100 KB Output is correct
31 Correct 9 ms 24156 KB Output is correct
32 Correct 9 ms 24172 KB Output is correct
33 Correct 10 ms 24152 KB Output is correct
34 Correct 9 ms 23928 KB Output is correct
35 Correct 10 ms 24064 KB Output is correct
36 Correct 10 ms 24148 KB Output is correct
37 Correct 9 ms 24156 KB Output is correct
38 Correct 9 ms 24096 KB Output is correct
39 Correct 537 ms 41448 KB Output is correct
40 Correct 498 ms 42224 KB Output is correct
41 Correct 488 ms 42064 KB Output is correct
42 Correct 442 ms 42576 KB Output is correct
43 Correct 658 ms 42868 KB Output is correct
44 Correct 328 ms 42580 KB Output is correct
45 Correct 559 ms 48544 KB Output is correct
46 Correct 239 ms 47696 KB Output is correct
47 Correct 496 ms 60500 KB Output is correct
48 Correct 2105 ms 74452 KB Output is correct
49 Correct 2115 ms 74904 KB Output is correct
50 Correct 521 ms 60892 KB Output is correct
51 Correct 496 ms 61008 KB Output is correct
52 Correct 897 ms 60756 KB Output is correct
53 Correct 1304 ms 60152 KB Output is correct
54 Correct 1032 ms 60148 KB Output is correct
55 Correct 39 ms 26060 KB Output is correct
56 Correct 28 ms 25692 KB Output is correct
57 Correct 271 ms 41556 KB Output is correct
58 Correct 88 ms 42440 KB Output is correct
59 Correct 497 ms 53632 KB Output is correct
60 Correct 2075 ms 85204 KB Output is correct
61 Correct 530 ms 61644 KB Output is correct
62 Correct 509 ms 61024 KB Output is correct
63 Correct 897 ms 60960 KB Output is correct
64 Correct 1790 ms 66216 KB Output is correct
65 Correct 1028 ms 62220 KB Output is correct
66 Correct 1778 ms 70432 KB Output is correct
67 Correct 305 ms 62376 KB Output is correct
68 Correct 903 ms 64436 KB Output is correct
69 Correct 990 ms 62648 KB Output is correct
70 Correct 896 ms 63060 KB Output is correct