oj.uz

Submission #1079027

# Submission time Handle Problem Language Result Execution time Memory
1079027 2024-08-28T09:34:23 Z coolboy19521 Race (IOI11_race) C++17
100 / 100
 2630 ms 242408 KB 
#include "race.h"
#include "bits/stdc++.h"
#define ll long long

using namespace std;

const int sz = 2e5 + 10;

vector<pair<int,int>> aj[sz];
map<ll,int> mc[sz], ban;
int ts[sz], k, r;

int uk(int v, int p = -1) {
    ts[v] = 1;
    for (auto& [u, _] : aj[v]) if (u != p)
        ts[v] += uk(u, v);
    return ts[v];
}

int fC(int v, int p = -1) {
    for (auto& [u, _] : aj[v])
        if (u != p && !ban[u])
        if (ts[u] > ts[v] / 2) {
            ts[v] -= ts[u];
            ts[u] += ts[v];
            return fC(u, v);
        }
    return v;
}

void marj(int v, int u) {
    for (auto& [tr, mn] : mc[u])
        if (mc[v].find(tr) != end(mc[v]))
            mc[v][tr] = min(mc[v][tr], mn);
        else mc[v][tr] = mn;
    mc[u].clear();
}

void dfs(int v, int p, int l, int d = 1) {
    mc[v][l] = d;
    for (auto& [u, w] : aj[v])
        if (u != p && !ban[u]) {
            dfs(u, v, l + w, d + 1);
            if (mc[v].size() < mc[u].size())
                mc[v].swap(mc[u]);
            marj(v, u);
        }
}

void cD(int v) {
    v = fC(v);
    mc[v].clear();
    for (auto& [u, w] : aj[v]) if (!ban[u]) {
        dfs(u, v, w);
        if (mc[v].size() < mc[u].size())
            mc[v].swap(mc[u]);
        for (auto& [tr, mn] : mc[u])
            if (mc[v].find(k - tr) != end(mc[v]))
                r = min(r, mn + mc[v][k - tr]);
        marj(v, u);
    }
    if (mc[v].find(k) != end(mc[v]))
        r = min(r, mc[v][k]);
    ban[v] = 1;
    for (auto& [u, _] : aj[v])
        if (!ban[u]) cD(u);
}

int best_path(int N, int K, int H[][2], int L[]) {
    if (1 == N) {
        if (0 == K) return 0;
        else return -1;
    }
    for (int i = 0; i < N - 1; i ++) {
        int a = H[i][0], b = H[i][1];
        aj[a].emplace_back(b, L[i]);
        aj[b].emplace_back(a, L[i]);
    }
    r = N, k = K;
    uk(0);
    cD(0);
    return r < N ? r : -1;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14684 KB Output is correct
2 Correct 3 ms 14684 KB Output is correct
3 Correct 4 ms 14684 KB Output is correct
4 Correct 4 ms 14684 KB Output is correct
5 Correct 3 ms 14680 KB Output is correct
6 Correct 3 ms 14684 KB Output is correct
7 Correct 4 ms 14916 KB Output is correct
8 Correct 4 ms 14684 KB Output is correct
9 Correct 3 ms 14908 KB Output is correct
10 Correct 3 ms 14684 KB Output is correct
11 Correct 3 ms 14684 KB Output is correct
12 Correct 3 ms 14684 KB Output is correct
13 Correct 4 ms 14680 KB Output is correct
14 Correct 4 ms 14684 KB Output is correct
15 Correct 4 ms 14684 KB Output is correct
16 Correct 3 ms 14684 KB Output is correct
17 Correct 3 ms 14684 KB Output is correct
18 Correct 3 ms 14684 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14684 KB Output is correct
2 Correct 3 ms 14684 KB Output is correct
3 Correct 4 ms 14684 KB Output is correct
4 Correct 4 ms 14684 KB Output is correct
5 Correct 3 ms 14680 KB Output is correct
6 Correct 3 ms 14684 KB Output is correct
7 Correct 4 ms 14916 KB Output is correct
8 Correct 4 ms 14684 KB Output is correct
9 Correct 3 ms 14908 KB Output is correct
10 Correct 3 ms 14684 KB Output is correct
11 Correct 3 ms 14684 KB Output is correct
12 Correct 3 ms 14684 KB Output is correct
13 Correct 4 ms 14680 KB Output is correct
14 Correct 4 ms 14684 KB Output is correct
15 Correct 4 ms 14684 KB Output is correct
16 Correct 3 ms 14684 KB Output is correct
17 Correct 3 ms 14684 KB Output is correct
18 Correct 3 ms 14684 KB Output is correct
19 Correct 3 ms 14684 KB Output is correct
20 Correct 3 ms 14684 KB Output is correct
21 Correct 6 ms 15196 KB Output is correct
22 Correct 6 ms 15196 KB Output is correct
23 Correct 6 ms 15192 KB Output is correct
24 Correct 5 ms 15196 KB Output is correct
25 Correct 6 ms 15192 KB Output is correct
26 Correct 5 ms 15196 KB Output is correct
27 Correct 4 ms 14936 KB Output is correct
28 Correct 6 ms 15196 KB Output is correct
29 Correct 6 ms 15196 KB Output is correct
30 Correct 6 ms 15196 KB Output is correct
31 Correct 8 ms 15196 KB Output is correct
32 Correct 6 ms 15192 KB Output is correct
33 Correct 6 ms 15196 KB Output is correct
34 Correct 6 ms 15288 KB Output is correct
35 Correct 6 ms 15196 KB Output is correct
36 Correct 5 ms 15252 KB Output is correct
37 Correct 5 ms 15196 KB Output is correct
38 Correct 6 ms 15360 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14684 KB Output is correct
2 Correct 3 ms 14684 KB Output is correct
3 Correct 4 ms 14684 KB Output is correct
4 Correct 4 ms 14684 KB Output is correct
5 Correct 3 ms 14680 KB Output is correct
6 Correct 3 ms 14684 KB Output is correct
7 Correct 4 ms 14916 KB Output is correct
8 Correct 4 ms 14684 KB Output is correct
9 Correct 3 ms 14908 KB Output is correct
10 Correct 3 ms 14684 KB Output is correct
11 Correct 3 ms 14684 KB Output is correct
12 Correct 3 ms 14684 KB Output is correct
13 Correct 4 ms 14680 KB Output is correct
14 Correct 4 ms 14684 KB Output is correct
15 Correct 4 ms 14684 KB Output is correct
16 Correct 3 ms 14684 KB Output is correct
17 Correct 3 ms 14684 KB Output is correct
18 Correct 3 ms 14684 KB Output is correct
19 Correct 538 ms 44032 KB Output is correct
20 Correct 546 ms 44164 KB Output is correct
21 Correct 549 ms 42832 KB Output is correct
22 Correct 461 ms 41556 KB Output is correct
23 Correct 1016 ms 68996 KB Output is correct
24 Correct 412 ms 40288 KB Output is correct
25 Correct 719 ms 41044 KB Output is correct
26 Correct 311 ms 36180 KB Output is correct
27 Correct 491 ms 80464 KB Output is correct
28 Correct 2526 ms 242332 KB Output is correct
29 Correct 2426 ms 236376 KB Output is correct
30 Correct 489 ms 80464 KB Output is correct
31 Correct 471 ms 80428 KB Output is correct
32 Correct 889 ms 80016 KB Output is correct
33 Correct 1568 ms 89540 KB Output is correct
34 Correct 2077 ms 196748 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14684 KB Output is correct
2 Correct 3 ms 14684 KB Output is correct
3 Correct 4 ms 14684 KB Output is correct
4 Correct 4 ms 14684 KB Output is correct
5 Correct 3 ms 14680 KB Output is correct
6 Correct 3 ms 14684 KB Output is correct
7 Correct 4 ms 14916 KB Output is correct
8 Correct 4 ms 14684 KB Output is correct
9 Correct 3 ms 14908 KB Output is correct
10 Correct 3 ms 14684 KB Output is correct
11 Correct 3 ms 14684 KB Output is correct
12 Correct 3 ms 14684 KB Output is correct
13 Correct 4 ms 14680 KB Output is correct
14 Correct 4 ms 14684 KB Output is correct
15 Correct 4 ms 14684 KB Output is correct
16 Correct 3 ms 14684 KB Output is correct
17 Correct 3 ms 14684 KB Output is correct
18 Correct 3 ms 14684 KB Output is correct
19 Correct 3 ms 14684 KB Output is correct
20 Correct 3 ms 14684 KB Output is correct
21 Correct 6 ms 15196 KB Output is correct
22 Correct 6 ms 15196 KB Output is correct
23 Correct 6 ms 15192 KB Output is correct
24 Correct 5 ms 15196 KB Output is correct
25 Correct 6 ms 15192 KB Output is correct
26 Correct 5 ms 15196 KB Output is correct
27 Correct 4 ms 14936 KB Output is correct
28 Correct 6 ms 15196 KB Output is correct
29 Correct 6 ms 15196 KB Output is correct
30 Correct 6 ms 15196 KB Output is correct
31 Correct 8 ms 15196 KB Output is correct
32 Correct 6 ms 15192 KB Output is correct
33 Correct 6 ms 15196 KB Output is correct
34 Correct 6 ms 15288 KB Output is correct
35 Correct 6 ms 15196 KB Output is correct
36 Correct 5 ms 15252 KB Output is correct
37 Correct 5 ms 15196 KB Output is correct
38 Correct 6 ms 15360 KB Output is correct
39 Correct 538 ms 44032 KB Output is correct
40 Correct 546 ms 44164 KB Output is correct
41 Correct 549 ms 42832 KB Output is correct
42 Correct 461 ms 41556 KB Output is correct
43 Correct 1016 ms 68996 KB Output is correct
44 Correct 412 ms 40288 KB Output is correct
45 Correct 719 ms 41044 KB Output is correct
46 Correct 311 ms 36180 KB Output is correct
47 Correct 491 ms 80464 KB Output is correct
48 Correct 2526 ms 242332 KB Output is correct
49 Correct 2426 ms 236376 KB Output is correct
50 Correct 489 ms 80464 KB Output is correct
51 Correct 471 ms 80428 KB Output is correct
52 Correct 889 ms 80016 KB Output is correct
53 Correct 1568 ms 89540 KB Output is correct
54 Correct 2077 ms 196748 KB Output is correct
55 Correct 41 ms 19536 KB Output is correct
56 Correct 28 ms 16976 KB Output is correct
57 Correct 307 ms 39484 KB Output is correct
58 Correct 85 ms 26564 KB Output is correct
59 Correct 625 ms 102216 KB Output is correct
60 Correct 2630 ms 228984 KB Output is correct
61 Correct 539 ms 87384 KB Output is correct
62 Correct 479 ms 80108 KB Output is correct
63 Correct 891 ms 79952 KB Output is correct
64 Correct 2039 ms 153628 KB Output is correct
65 Correct 1600 ms 142700 KB Output is correct
66 Correct 2316 ms 242408 KB Output is correct
67 Correct 359 ms 38076 KB Output is correct
68 Correct 921 ms 93552 KB Output is correct
69 Correct 981 ms 93308 KB Output is correct
70 Correct 889 ms 89168 KB Output is correct