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답안 #1112071

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1112071 2024-11-13T16:00:57 Z FucKanh 경주 (Race) (IOI11_race) C++14
100 / 100
 585 ms 186036 KB 
#include <bits/stdc++.h>
#define ll long long
#define pii pair<long long,long long>

using namespace std;

const ll maxn = 5e5 + 2;

ll sz[maxn],h[maxn],k;
vector<pii> a[maxn];
ll ans = LLONG_MAX;
map<ll,ll> mp[maxn];

void dfs(ll u, ll w, ll pa) {
    assert(h[u]!=0);
    for (pii tmp : a[u]) {
        ll wv,v; tie(v,wv) = tmp;
        if (v==pa) continue;
        h[v] = h[u] + 1;
        dfs(v,w+wv,u);

        mp[v][w+wv] = h[v];

        if (mp[u].size() < mp[v].size()) swap(mp[u],mp[v]);

        for (pii val : mp[v]) {
            if (val.second==0) continue;
            if (val.first - w < k && mp[u][k-val.first+2*w] != 0) {
                ans = min(ans, mp[u][k-val.first+2*w] - h[u] + val.second - h[u]);
            }
        }
        for (pii val : mp[v]) {
            if (val.second==0) continue;
             mp[u][val.first] = mp[u][val.first] == 0 ? val.second : min(val.second,mp[u][val.first]);
        }

        if (mp[u][w + k] != 0) {
            ans = min(ans, mp[u][w+k]-h[u]);
        }
    }

}

int best_path(int _n, int _k, int _h[][2], int _L[])
{
    k = _k;
    for (ll i = 0; i < _n - 1; i++){
        ll x = _h[i][0], y = _h[i][1];
        ll w = _L[i];
        a[x].push_back({y,w});
        a[y].push_back({x,w});
    }
    h[0] = 1;
    dfs(0,0,-1);
    assert(ans > 0);
    return ans == LLONG_MAX ? -1 : ans;
}
//void file(string name) {
//    if (fopen((name + ".inp").c_str(), "r")) {
//        freopen((name + ".inp").c_str(), "r", stdin);
//        freopen((name + ".out").c_str(), "w", stdout);
//    }
//}
//signed main() {
//    file("race");
//    int N,K; cin >> N >> K;
//    int h[N][2],l[N];
//    for (int i = 0; i < N-1; i++) {
//        int x,y,w; cin >> x >> y >> w;
//        h[i][1] = x;
//        h[i][0] = y;
//        l[i] = w;
//    }
//    cout << best_path(N,K,h,l);
//}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 39248 KB Output is correct
2 Correct 7 ms 39248 KB Output is correct
3 Correct 7 ms 39248 KB Output is correct
4 Correct 7 ms 39248 KB Output is correct
5 Correct 7 ms 39248 KB Output is correct
6 Correct 7 ms 39248 KB Output is correct
7 Correct 6 ms 39248 KB Output is correct
8 Correct 7 ms 39248 KB Output is correct
9 Correct 7 ms 39364 KB Output is correct
10 Correct 7 ms 39420 KB Output is correct
11 Correct 7 ms 39248 KB Output is correct
12 Correct 7 ms 39248 KB Output is correct
13 Correct 6 ms 39248 KB Output is correct
14 Correct 6 ms 39248 KB Output is correct
15 Correct 6 ms 39248 KB Output is correct
16 Correct 8 ms 39248 KB Output is correct
17 Correct 7 ms 39248 KB Output is correct
18 Correct 7 ms 39248 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 39248 KB Output is correct
2 Correct 7 ms 39248 KB Output is correct
3 Correct 7 ms 39248 KB Output is correct
4 Correct 7 ms 39248 KB Output is correct
5 Correct 7 ms 39248 KB Output is correct
6 Correct 7 ms 39248 KB Output is correct
7 Correct 6 ms 39248 KB Output is correct
8 Correct 7 ms 39248 KB Output is correct
9 Correct 7 ms 39364 KB Output is correct
10 Correct 7 ms 39420 KB Output is correct
11 Correct 7 ms 39248 KB Output is correct
12 Correct 7 ms 39248 KB Output is correct
13 Correct 6 ms 39248 KB Output is correct
14 Correct 6 ms 39248 KB Output is correct
15 Correct 6 ms 39248 KB Output is correct
16 Correct 8 ms 39248 KB Output is correct
17 Correct 7 ms 39248 KB Output is correct
18 Correct 7 ms 39248 KB Output is correct
19 Correct 7 ms 39248 KB Output is correct
20 Correct 7 ms 39248 KB Output is correct
21 Correct 10 ms 39772 KB Output is correct
22 Correct 9 ms 39776 KB Output is correct
23 Correct 9 ms 39760 KB Output is correct
24 Correct 7 ms 39760 KB Output is correct
25 Correct 7 ms 39760 KB Output is correct
26 Correct 7 ms 39760 KB Output is correct
27 Correct 7 ms 39404 KB Output is correct
28 Correct 7 ms 39760 KB Output is correct
29 Correct 7 ms 39760 KB Output is correct
30 Correct 8 ms 39760 KB Output is correct
31 Correct 8 ms 39680 KB Output is correct
32 Correct 7 ms 39760 KB Output is correct
33 Correct 8 ms 39760 KB Output is correct
34 Correct 7 ms 39592 KB Output is correct
35 Correct 8 ms 39504 KB Output is correct
36 Correct 7 ms 39608 KB Output is correct
37 Correct 7 ms 39668 KB Output is correct
38 Correct 7 ms 39760 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 39248 KB Output is correct
2 Correct 7 ms 39248 KB Output is correct
3 Correct 7 ms 39248 KB Output is correct
4 Correct 7 ms 39248 KB Output is correct
5 Correct 7 ms 39248 KB Output is correct
6 Correct 7 ms 39248 KB Output is correct
7 Correct 6 ms 39248 KB Output is correct
8 Correct 7 ms 39248 KB Output is correct
9 Correct 7 ms 39364 KB Output is correct
10 Correct 7 ms 39420 KB Output is correct
11 Correct 7 ms 39248 KB Output is correct
12 Correct 7 ms 39248 KB Output is correct
13 Correct 6 ms 39248 KB Output is correct
14 Correct 6 ms 39248 KB Output is correct
15 Correct 6 ms 39248 KB Output is correct
16 Correct 8 ms 39248 KB Output is correct
17 Correct 7 ms 39248 KB Output is correct
18 Correct 7 ms 39248 KB Output is correct
19 Correct 113 ms 69448 KB Output is correct
20 Correct 121 ms 70768 KB Output is correct
21 Correct 116 ms 70728 KB Output is correct
22 Correct 126 ms 69960 KB Output is correct
23 Correct 168 ms 81992 KB Output is correct
24 Correct 131 ms 74056 KB Output is correct
25 Correct 71 ms 61000 KB Output is correct
26 Correct 57 ms 69960 KB Output is correct
27 Correct 183 ms 75336 KB Output is correct
28 Correct 186 ms 121672 KB Output is correct
29 Correct 194 ms 119556 KB Output is correct
30 Correct 170 ms 75420 KB Output is correct
31 Correct 162 ms 75336 KB Output is correct
32 Correct 199 ms 76844 KB Output is correct
33 Correct 164 ms 72736 KB Output is correct
34 Correct 298 ms 114248 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 39248 KB Output is correct
2 Correct 7 ms 39248 KB Output is correct
3 Correct 7 ms 39248 KB Output is correct
4 Correct 7 ms 39248 KB Output is correct
5 Correct 7 ms 39248 KB Output is correct
6 Correct 7 ms 39248 KB Output is correct
7 Correct 6 ms 39248 KB Output is correct
8 Correct 7 ms 39248 KB Output is correct
9 Correct 7 ms 39364 KB Output is correct
10 Correct 7 ms 39420 KB Output is correct
11 Correct 7 ms 39248 KB Output is correct
12 Correct 7 ms 39248 KB Output is correct
13 Correct 6 ms 39248 KB Output is correct
14 Correct 6 ms 39248 KB Output is correct
15 Correct 6 ms 39248 KB Output is correct
16 Correct 8 ms 39248 KB Output is correct
17 Correct 7 ms 39248 KB Output is correct
18 Correct 7 ms 39248 KB Output is correct
19 Correct 7 ms 39248 KB Output is correct
20 Correct 7 ms 39248 KB Output is correct
21 Correct 10 ms 39772 KB Output is correct
22 Correct 9 ms 39776 KB Output is correct
23 Correct 9 ms 39760 KB Output is correct
24 Correct 7 ms 39760 KB Output is correct
25 Correct 7 ms 39760 KB Output is correct
26 Correct 7 ms 39760 KB Output is correct
27 Correct 7 ms 39404 KB Output is correct
28 Correct 7 ms 39760 KB Output is correct
29 Correct 7 ms 39760 KB Output is correct
30 Correct 8 ms 39760 KB Output is correct
31 Correct 8 ms 39680 KB Output is correct
32 Correct 7 ms 39760 KB Output is correct
33 Correct 8 ms 39760 KB Output is correct
34 Correct 7 ms 39592 KB Output is correct
35 Correct 8 ms 39504 KB Output is correct
36 Correct 7 ms 39608 KB Output is correct
37 Correct 7 ms 39668 KB Output is correct
38 Correct 7 ms 39760 KB Output is correct
39 Correct 113 ms 69448 KB Output is correct
40 Correct 121 ms 70768 KB Output is correct
41 Correct 116 ms 70728 KB Output is correct
42 Correct 126 ms 69960 KB Output is correct
43 Correct 168 ms 81992 KB Output is correct
44 Correct 131 ms 74056 KB Output is correct
45 Correct 71 ms 61000 KB Output is correct
46 Correct 57 ms 69960 KB Output is correct
47 Correct 183 ms 75336 KB Output is correct
48 Correct 186 ms 121672 KB Output is correct
49 Correct 194 ms 119556 KB Output is correct
50 Correct 170 ms 75420 KB Output is correct
51 Correct 162 ms 75336 KB Output is correct
52 Correct 199 ms 76844 KB Output is correct
53 Correct 164 ms 72736 KB Output is correct
54 Correct 298 ms 114248 KB Output is correct
55 Correct 25 ms 43856 KB Output is correct
56 Correct 16 ms 41552 KB Output is correct
57 Correct 84 ms 68944 KB Output is correct
58 Correct 45 ms 55992 KB Output is correct
59 Correct 97 ms 82284 KB Output is correct
60 Correct 259 ms 120420 KB Output is correct
61 Correct 246 ms 81480 KB Output is correct
62 Correct 191 ms 76912 KB Output is correct
63 Correct 213 ms 76872 KB Output is correct
64 Correct 585 ms 186036 KB Output is correct
65 Correct 382 ms 129224 KB Output is correct
66 Correct 258 ms 115224 KB Output is correct
67 Correct 135 ms 70280 KB Output is correct
68 Correct 360 ms 109896 KB Output is correct
69 Correct 427 ms 118600 KB Output is correct
70 Correct 358 ms 107336 KB Output is correct