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Submission #1084817

# Submission time Handle Problem Language Result Execution time Memory
1084817 2024-09-07T04:25:05 Z _Masum_Billah Race (IOI11_race) C++17
21 / 100
 3000 ms 169056 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long

const ll N = 2e5 + 10;
vector<array<ll, 2>> ad[N];
ll mark[N], sz[N], ans = 1e18, k;
array<ll, 2> nodes[N];
int t, tin[N], tout[N], lv[N];
map <ll, ll> we;

ll size(ll node, ll par) {
    sz[node] = 1;
    for (auto [v, w] : ad[node]) {
        if (v != par and !mark[v]) {
            sz[node] += size(v, node);
        }
    }
    return sz[node];
}

ll centroid(ll node, ll par, ll s) {
    for (auto [v, w] : ad[node]) {
        if (v != par and !mark[v]) {
            if (sz[v] > s / 2) return centroid(v, node, s);
        }
    }
    return node;
}
void dfs(ll node, ll par, ll wt, int l = 0) {
    nodes[t] = {node, wt};
    tin[node] = t++;
    lv[node] = l;
    for (auto [v, w] : ad[node]) {
        if (v != par and !mark[v]) {
            dfs(v, node, wt + w, l + 1);
        }
    }
    tout[node] = t - 1;
}

void go(ll node) {
    ll s = size(node, node);
    ll c = centroid(node, node, s);
    mark[c] = 1;
    t = 0;
    dfs(c, c, 0);

    for (int i = 0; i < t; i++) {
        auto [a, b] = nodes[i];
        we[b] = 1e18;
    }

    we[0] = 0;
    for (auto [v, w] : ad[c]) {
        if (!mark[v]) {
            for (ll i = tin[v]; i <= tout[v]; i++) {
                auto [a, b] = nodes[i];
                if (k - b >= 0 and we.find(k - b) != we.end())
                    ans = min(ans, we[k - b] + lv[a]);
            }
            for (ll i = tin[v]; i <= tout[v]; i++) {
                auto [a, b] = nodes[i];
                we[b] = min(we[b], 1ll * lv[a]);
            }
        }
    }
    for (int i = 0; i < t; i++) {
        auto [a, b] = nodes[i];
        we[b] = 1e18;
    }

    for (auto [v, w] : ad[c]) {
        if (!mark[v]) {
            go(v);
        }
    }
}

int best_path(int n, int d, int H[][2], int dis[]) {
    k = d;
    for (int i = 0; i + 1 < n; i++) {
        ad[H[i][0]].push_back({H[i][1], dis[i]});
        ad[H[i][1]].push_back({H[i][0], dis[i]});
    }
    go(0);
    if (ans == 1e18) ans = -1;
    return ans;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5152 KB Output is correct
2 Correct 2 ms 5172 KB Output is correct
3 Correct 2 ms 5212 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 5212 KB Output is correct
8 Correct 4 ms 5212 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 3 ms 5208 KB Output is correct
11 Correct 3 ms 5020 KB Output is correct
12 Correct 2 ms 5152 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 5152 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 3 ms 4952 KB Output is correct
18 Correct 2 ms 5200 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5152 KB Output is correct
2 Correct 2 ms 5172 KB Output is correct
3 Correct 2 ms 5212 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 5212 KB Output is correct
8 Correct 4 ms 5212 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 3 ms 5208 KB Output is correct
11 Correct 3 ms 5020 KB Output is correct
12 Correct 2 ms 5152 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 5152 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 3 ms 4952 KB Output is correct
18 Correct 2 ms 5200 KB Output is correct
19 Correct 2 ms 5160 KB Output is correct
20 Correct 4 ms 5208 KB Output is correct
21 Correct 3 ms 5212 KB Output is correct
22 Correct 5 ms 5468 KB Output is correct
23 Correct 5 ms 5468 KB Output is correct
24 Correct 5 ms 5468 KB Output is correct
25 Correct 4 ms 5468 KB Output is correct
26 Correct 4 ms 5424 KB Output is correct
27 Correct 3 ms 5164 KB Output is correct
28 Correct 4 ms 5428 KB Output is correct
29 Correct 4 ms 5468 KB Output is correct
30 Correct 5 ms 5464 KB Output is correct
31 Correct 6 ms 5468 KB Output is correct
32 Correct 5 ms 5588 KB Output is correct
33 Correct 5 ms 5612 KB Output is correct
34 Correct 6 ms 5680 KB Output is correct
35 Correct 5 ms 5468 KB Output is correct
36 Correct 6 ms 5468 KB Output is correct
37 Correct 4 ms 5468 KB Output is correct
38 Correct 8 ms 5468 KB Output is correct

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5152 KB Output is correct
2 Correct 2 ms 5172 KB Output is correct
3 Correct 2 ms 5212 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 5212 KB Output is correct
8 Correct 4 ms 5212 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 3 ms 5208 KB Output is correct
11 Correct 3 ms 5020 KB Output is correct
12 Correct 2 ms 5152 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 5152 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 3 ms 4952 KB Output is correct
18 Correct 2 ms 5200 KB Output is correct
19 Correct 219 ms 17100 KB Output is correct
20 Correct 200 ms 17000 KB Output is correct
21 Correct 200 ms 17236 KB Output is correct
22 Correct 194 ms 16976 KB Output is correct
23 Correct 308 ms 17492 KB Output is correct
24 Correct 126 ms 16728 KB Output is correct
25 Correct 202 ms 20304 KB Output is correct
26 Correct 106 ms 22864 KB Output is correct
27 Correct 300 ms 29776 KB Output is correct
28 Correct 2017 ms 91272 KB Output is correct
29 Correct 1689 ms 83396 KB Output is correct
30 Correct 307 ms 29776 KB Output is correct
31 Correct 299 ms 29872 KB Output is correct
32 Correct 350 ms 29992 KB Output is correct
33 Correct 386 ms 28496 KB Output is correct
34 Execution timed out 3045 ms 169056 KB Time limit exceeded
35 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5152 KB Output is correct
2 Correct 2 ms 5172 KB Output is correct
3 Correct 2 ms 5212 KB Output is correct
4 Correct 3 ms 4956 KB Output is correct
5 Correct 2 ms 4956 KB Output is correct
6 Correct 2 ms 4956 KB Output is correct
7 Correct 2 ms 5212 KB Output is correct
8 Correct 4 ms 5212 KB Output is correct
9 Correct 2 ms 4956 KB Output is correct
10 Correct 3 ms 5208 KB Output is correct
11 Correct 3 ms 5020 KB Output is correct
12 Correct 2 ms 5152 KB Output is correct
13 Correct 2 ms 4956 KB Output is correct
14 Correct 2 ms 4956 KB Output is correct
15 Correct 2 ms 5152 KB Output is correct
16 Correct 2 ms 4956 KB Output is correct
17 Correct 3 ms 4952 KB Output is correct
18 Correct 2 ms 5200 KB Output is correct
19 Correct 2 ms 5160 KB Output is correct
20 Correct 4 ms 5208 KB Output is correct
21 Correct 3 ms 5212 KB Output is correct
22 Correct 5 ms 5468 KB Output is correct
23 Correct 5 ms 5468 KB Output is correct
24 Correct 5 ms 5468 KB Output is correct
25 Correct 4 ms 5468 KB Output is correct
26 Correct 4 ms 5424 KB Output is correct
27 Correct 3 ms 5164 KB Output is correct
28 Correct 4 ms 5428 KB Output is correct
29 Correct 4 ms 5468 KB Output is correct
30 Correct 5 ms 5464 KB Output is correct
31 Correct 6 ms 5468 KB Output is correct
32 Correct 5 ms 5588 KB Output is correct
33 Correct 5 ms 5612 KB Output is correct
34 Correct 6 ms 5680 KB Output is correct
35 Correct 5 ms 5468 KB Output is correct
36 Correct 6 ms 5468 KB Output is correct
37 Correct 4 ms 5468 KB Output is correct
38 Correct 8 ms 5468 KB Output is correct
39 Correct 219 ms 17100 KB Output is correct
40 Correct 200 ms 17000 KB Output is correct
41 Correct 200 ms 17236 KB Output is correct
42 Correct 194 ms 16976 KB Output is correct
43 Correct 308 ms 17492 KB Output is correct
44 Correct 126 ms 16728 KB Output is correct
45 Correct 202 ms 20304 KB Output is correct
46 Correct 106 ms 22864 KB Output is correct
47 Correct 300 ms 29776 KB Output is correct
48 Correct 2017 ms 91272 KB Output is correct
49 Correct 1689 ms 83396 KB Output is correct
50 Correct 307 ms 29776 KB Output is correct
51 Correct 299 ms 29872 KB Output is correct
52 Correct 350 ms 29992 KB Output is correct
53 Correct 386 ms 28496 KB Output is correct
54 Execution timed out 3045 ms 169056 KB Time limit exceeded
55 Halted 0 ms 0 KB -