oj.uz

답안 #984616

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
984616 2024-05-16T21:44:45 Z tfgs 경주 (Race) (IOI11_race) C++17
100 / 100
 446 ms 113348 KB 
#include <bits/stdc++.h>
#include "race.h"
using namespace std;
#define int int64_t
const int inf = 2e18;

#ifdef LOCAL
#include "algo/debug.h"
#endif

#define f first
#define s second
template<class T> using V = vector<T>; 
using vi = V<int>;
using vb = V<bool>;
using vs = V<string>;

#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x) 
#define pb push_back
#define lb lower_bound
#define ub upper_bound
template<class T> int lwb(V<T>& a, const T& b) { return lb(all(a),b)-bg(a); }
template<class T> int upb(V<T>& a, const T& b) { return ub(all(a),b)-bg(a); }


const int max_n = 2e5;
int n, k;
array<int, 2> inp_e[max_n];
int inp_w[max_n];
int ans = inf;
map<int, int> sub[max_n];
V<array<int, 2>> g[max_n];
int W[max_n], L[max_n];

void precomp(int u, int p, int cur_w, int cur_l) {
    W[u] = cur_w;
    L[u] = cur_l;
    sub[u][cur_w] = cur_l;
    for (auto [w, v] : g[u]) if (v != p) {
        precomp(v, u, cur_w+w, cur_l+1);
    }
}

void dfs(int u, int p) {
    int target = k + 2*W[u];

    for (auto [w, v] : g[u]) if (v != p) {
        dfs(v, u);
        if (sub[v].size() > sub[u].size()) swap(sub[u], sub[v]);

        for (auto [ww, zz] : sub[v]) {
            auto found = sub[u].find(target-ww);
            if (found != end(sub[u]))
                ans = min(ans, zz+found->s - 2*L[u]);
        }
        for (auto [ww, zz] : sub[v]) {
            auto found = sub[u].find(ww);
            if (found == end(sub[u])) sub[u].insert({ww, zz});
            else sub[u][ww] = min(sub[u][ww], zz);
        }
    }
}

void read() {
    cin >> n >> k;
    for (int i = 0; i < n-1; i++) cin >> inp_e[i][0] >> inp_e[i][1];
    for (int i = 0; i < n-1; i++) cin >> inp_w[i];
}

void solve() {
    for (int i = 0; i < n-1; i++) {
        g[inp_e[i][0]].pb({inp_w[i], inp_e[i][1]});
        g[inp_e[i][1]].pb({inp_w[i], inp_e[i][0]});
    }
    precomp(0, -1, 0, 0);
    dfs(0, -1);
    if (ans == inf) ans = -1;
}

#undef int
int best_path(int N, int K, int INP_E[][2], int INP_W[]) {
    // ::n = n;
    // ::k = k;
    n = N;
    k = K;
    for (int i = 0; i < n-1; i++) {
        for (int j = 0; j < 2; j++)
            inp_e[i][j] = INP_E[i][j];
        inp_w[i] = INP_W[i];
    }
    read();
    solve();
    return ans;
}

// signed main() {
    // ios::sync_with_stdio(false);
    // cin.tie(0); cout.tie(0);
    // read();
    // solve();
    // cout << ans << '\n';
    // return 0;
// }

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 22876 KB Output is correct
2 Correct 4 ms 22876 KB Output is correct
3 Correct 4 ms 22876 KB Output is correct
4 Correct 4 ms 22876 KB Output is correct
5 Correct 5 ms 22872 KB Output is correct
6 Correct 4 ms 23004 KB Output is correct
7 Correct 4 ms 22876 KB Output is correct
8 Correct 4 ms 22876 KB Output is correct
9 Correct 4 ms 22872 KB Output is correct
10 Correct 4 ms 22876 KB Output is correct
11 Correct 4 ms 22876 KB Output is correct
12 Correct 4 ms 22876 KB Output is correct
13 Correct 4 ms 22876 KB Output is correct
14 Correct 5 ms 22876 KB Output is correct
15 Correct 5 ms 22876 KB Output is correct
16 Correct 5 ms 22876 KB Output is correct
17 Correct 4 ms 22960 KB Output is correct
18 Correct 4 ms 22876 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 22876 KB Output is correct
2 Correct 4 ms 22876 KB Output is correct
3 Correct 4 ms 22876 KB Output is correct
4 Correct 4 ms 22876 KB Output is correct
5 Correct 5 ms 22872 KB Output is correct
6 Correct 4 ms 23004 KB Output is correct
7 Correct 4 ms 22876 KB Output is correct
8 Correct 4 ms 22876 KB Output is correct
9 Correct 4 ms 22872 KB Output is correct
10 Correct 4 ms 22876 KB Output is correct
11 Correct 4 ms 22876 KB Output is correct
12 Correct 4 ms 22876 KB Output is correct
13 Correct 4 ms 22876 KB Output is correct
14 Correct 5 ms 22876 KB Output is correct
15 Correct 5 ms 22876 KB Output is correct
16 Correct 5 ms 22876 KB Output is correct
17 Correct 4 ms 22960 KB Output is correct
18 Correct 4 ms 22876 KB Output is correct
19 Correct 4 ms 22872 KB Output is correct
20 Correct 4 ms 22884 KB Output is correct
21 Correct 5 ms 23132 KB Output is correct
22 Correct 5 ms 23132 KB Output is correct
23 Correct 6 ms 23200 KB Output is correct
24 Correct 5 ms 23132 KB Output is correct
25 Correct 6 ms 23132 KB Output is correct
26 Correct 5 ms 23336 KB Output is correct
27 Correct 5 ms 23132 KB Output is correct
28 Correct 6 ms 23132 KB Output is correct
29 Correct 5 ms 23132 KB Output is correct
30 Correct 6 ms 23128 KB Output is correct
31 Correct 6 ms 23132 KB Output is correct
32 Correct 5 ms 23128 KB Output is correct
33 Correct 6 ms 23216 KB Output is correct
34 Correct 5 ms 23132 KB Output is correct
35 Correct 5 ms 23228 KB Output is correct
36 Correct 5 ms 23132 KB Output is correct
37 Correct 5 ms 23132 KB Output is correct
38 Correct 5 ms 23132 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 22876 KB Output is correct
2 Correct 4 ms 22876 KB Output is correct
3 Correct 4 ms 22876 KB Output is correct
4 Correct 4 ms 22876 KB Output is correct
5 Correct 5 ms 22872 KB Output is correct
6 Correct 4 ms 23004 KB Output is correct
7 Correct 4 ms 22876 KB Output is correct
8 Correct 4 ms 22876 KB Output is correct
9 Correct 4 ms 22872 KB Output is correct
10 Correct 4 ms 22876 KB Output is correct
11 Correct 4 ms 22876 KB Output is correct
12 Correct 4 ms 22876 KB Output is correct
13 Correct 4 ms 22876 KB Output is correct
14 Correct 5 ms 22876 KB Output is correct
15 Correct 5 ms 22876 KB Output is correct
16 Correct 5 ms 22876 KB Output is correct
17 Correct 4 ms 22960 KB Output is correct
18 Correct 4 ms 22876 KB Output is correct
19 Correct 121 ms 47956 KB Output is correct
20 Correct 114 ms 48980 KB Output is correct
21 Correct 116 ms 48288 KB Output is correct
22 Correct 106 ms 48464 KB Output is correct
23 Correct 145 ms 61464 KB Output is correct
24 Correct 104 ms 51456 KB Output is correct
25 Correct 102 ms 49128 KB Output is correct
26 Correct 56 ms 56092 KB Output is correct
27 Correct 167 ms 59396 KB Output is correct
28 Correct 264 ms 98916 KB Output is correct
29 Correct 261 ms 97380 KB Output is correct
30 Correct 164 ms 60036 KB Output is correct
31 Correct 185 ms 60168 KB Output is correct
32 Correct 226 ms 60048 KB Output is correct
33 Correct 225 ms 64996 KB Output is correct
34 Correct 313 ms 97336 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 22876 KB Output is correct
2 Correct 4 ms 22876 KB Output is correct
3 Correct 4 ms 22876 KB Output is correct
4 Correct 4 ms 22876 KB Output is correct
5 Correct 5 ms 22872 KB Output is correct
6 Correct 4 ms 23004 KB Output is correct
7 Correct 4 ms 22876 KB Output is correct
8 Correct 4 ms 22876 KB Output is correct
9 Correct 4 ms 22872 KB Output is correct
10 Correct 4 ms 22876 KB Output is correct
11 Correct 4 ms 22876 KB Output is correct
12 Correct 4 ms 22876 KB Output is correct
13 Correct 4 ms 22876 KB Output is correct
14 Correct 5 ms 22876 KB Output is correct
15 Correct 5 ms 22876 KB Output is correct
16 Correct 5 ms 22876 KB Output is correct
17 Correct 4 ms 22960 KB Output is correct
18 Correct 4 ms 22876 KB Output is correct
19 Correct 4 ms 22872 KB Output is correct
20 Correct 4 ms 22884 KB Output is correct
21 Correct 5 ms 23132 KB Output is correct
22 Correct 5 ms 23132 KB Output is correct
23 Correct 6 ms 23200 KB Output is correct
24 Correct 5 ms 23132 KB Output is correct
25 Correct 6 ms 23132 KB Output is correct
26 Correct 5 ms 23336 KB Output is correct
27 Correct 5 ms 23132 KB Output is correct
28 Correct 6 ms 23132 KB Output is correct
29 Correct 5 ms 23132 KB Output is correct
30 Correct 6 ms 23128 KB Output is correct
31 Correct 6 ms 23132 KB Output is correct
32 Correct 5 ms 23128 KB Output is correct
33 Correct 6 ms 23216 KB Output is correct
34 Correct 5 ms 23132 KB Output is correct
35 Correct 5 ms 23228 KB Output is correct
36 Correct 5 ms 23132 KB Output is correct
37 Correct 5 ms 23132 KB Output is correct
38 Correct 5 ms 23132 KB Output is correct
39 Correct 121 ms 47956 KB Output is correct
40 Correct 114 ms 48980 KB Output is correct
41 Correct 116 ms 48288 KB Output is correct
42 Correct 106 ms 48464 KB Output is correct
43 Correct 145 ms 61464 KB Output is correct
44 Correct 104 ms 51456 KB Output is correct
45 Correct 102 ms 49128 KB Output is correct
46 Correct 56 ms 56092 KB Output is correct
47 Correct 167 ms 59396 KB Output is correct
48 Correct 264 ms 98916 KB Output is correct
49 Correct 261 ms 97380 KB Output is correct
50 Correct 164 ms 60036 KB Output is correct
51 Correct 185 ms 60168 KB Output is correct
52 Correct 226 ms 60048 KB Output is correct
53 Correct 225 ms 64996 KB Output is correct
54 Correct 313 ms 97336 KB Output is correct
55 Correct 16 ms 27992 KB Output is correct
56 Correct 11 ms 26716 KB Output is correct
57 Correct 62 ms 45652 KB Output is correct
58 Correct 45 ms 39360 KB Output is correct
59 Correct 81 ms 62352 KB Output is correct
60 Correct 248 ms 97876 KB Output is correct
61 Correct 193 ms 63028 KB Output is correct
62 Correct 175 ms 59988 KB Output is correct
63 Correct 254 ms 59960 KB Output is correct
64 Correct 446 ms 113348 KB Output is correct
65 Correct 397 ms 113264 KB Output is correct
66 Correct 279 ms 91608 KB Output is correct
67 Correct 162 ms 53820 KB Output is correct
68 Correct 309 ms 76224 KB Output is correct
69 Correct 332 ms 78676 KB Output is correct
70 Correct 287 ms 74152 KB Output is correct