oj.uz

Submission #93298

# Submission time Handle Problem Language Result Execution time Memory
93298 2019-01-07T13:16:41 Z toloraia Hard route (IZhO17_road) C++14
52 / 100
 2000 ms 58516 KB 
#include <bits/stdc++.h>
#define ll long long
#define F first
#define S second
using namespace std;

const int N = 5e5 + 5;

int n;
vector < int > g[N];
ll ans = -1, num;
ll D[N];

void dfs (int k, int p){
    D[k] = 0;
    for (int u: g[k]){
        if (u == p)
            continue;
        dfs (u, k);
        D[k] = max (D[k], D[u]);
    }
    D[k]++;
}

void go (int k, int p, ll d, ll dd){
    if ((int)g[k].size() == 1 && p != 0){
        if (ans == d * dd)
            num++;
        if (ans < d * dd){
            ans = d * dd;
            num = 1;
        }
    }
    ll x = 0, y = 0;
    for (int u: g[k]){
        if (u == p)
            continue;
        y = max (y, D[u]);
        if (x < y)
            swap (x, y);
    }
    for (int u: g[k]){
        if (u == p)
            continue;
        ll t = x;
        if (t == D[u])
            t = y;
        go (u, k, d + 1, max (dd, t));
    }
}

int main()
{
    ios::sync_with_stdio(false);
    cin>>n;
    for (int i = 1; i < n; i++){
        int u, v;
        cin>>u>>v;
        g[u].push_back (v);
        g[v].push_back (u);
    }
    for (int S = 1; S <= n; S++){
        if ((int)g[S].size() > 1)
            continue;
        dfs (S, 0);
        go (S, 0, 0, 0);
    }
    cout<<ans<<" "<<num / 2<<endl;
    return 0;
}

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 12024 KB Output is correct
2 Correct 13 ms 12152 KB Output is correct
3 Correct 13 ms 12152 KB Output is correct
4 Correct 12 ms 12152 KB Output is correct
5 Correct 12 ms 12024 KB Output is correct
6 Correct 10 ms 12024 KB Output is correct
7 Correct 10 ms 12024 KB Output is correct
8 Correct 11 ms 12024 KB Output is correct
9 Correct 12 ms 12152 KB Output is correct
10 Correct 10 ms 12024 KB Output is correct
11 Correct 12 ms 12152 KB Output is correct
12 Correct 10 ms 12152 KB Output is correct
13 Correct 10 ms 12152 KB Output is correct
14 Correct 10 ms 12152 KB Output is correct
15 Correct 10 ms 12152 KB Output is correct
16 Correct 10 ms 12152 KB Output is correct
17 Correct 10 ms 12152 KB Output is correct
18 Correct 10 ms 12152 KB Output is correct
19 Correct 10 ms 12152 KB Output is correct
20 Correct 10 ms 12024 KB Output is correct
21 Correct 9 ms 12028 KB Output is correct
22 Correct 10 ms 12024 KB Output is correct
23 Correct 10 ms 12024 KB Output is correct
24 Correct 10 ms 12152 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 12024 KB Output is correct
2 Correct 13 ms 12152 KB Output is correct
3 Correct 13 ms 12152 KB Output is correct
4 Correct 12 ms 12152 KB Output is correct
5 Correct 12 ms 12024 KB Output is correct
6 Correct 10 ms 12024 KB Output is correct
7 Correct 10 ms 12024 KB Output is correct
8 Correct 11 ms 12024 KB Output is correct
9 Correct 12 ms 12152 KB Output is correct
10 Correct 10 ms 12024 KB Output is correct
11 Correct 12 ms 12152 KB Output is correct
12 Correct 10 ms 12152 KB Output is correct
13 Correct 10 ms 12152 KB Output is correct
14 Correct 10 ms 12152 KB Output is correct
15 Correct 10 ms 12152 KB Output is correct
16 Correct 10 ms 12152 KB Output is correct
17 Correct 10 ms 12152 KB Output is correct
18 Correct 10 ms 12152 KB Output is correct
19 Correct 10 ms 12152 KB Output is correct
20 Correct 10 ms 12024 KB Output is correct
21 Correct 9 ms 12028 KB Output is correct
22 Correct 10 ms 12024 KB Output is correct
23 Correct 10 ms 12024 KB Output is correct
24 Correct 10 ms 12152 KB Output is correct
25 Correct 295 ms 12536 KB Output is correct
26 Correct 298 ms 12408 KB Output is correct
27 Correct 300 ms 12536 KB Output is correct
28 Correct 296 ms 12536 KB Output is correct
29 Correct 346 ms 12516 KB Output is correct
30 Correct 381 ms 12536 KB Output is correct
31 Correct 365 ms 12508 KB Output is correct
32 Correct 372 ms 12664 KB Output is correct
33 Correct 15 ms 12536 KB Output is correct
34 Correct 14 ms 12540 KB Output is correct
35 Correct 14 ms 12536 KB Output is correct
36 Correct 15 ms 12636 KB Output is correct
37 Correct 13 ms 12636 KB Output is correct
38 Correct 12 ms 12664 KB Output is correct
39 Correct 13 ms 12408 KB Output is correct
40 Correct 15 ms 12408 KB Output is correct
41 Correct 20 ms 12280 KB Output is correct
42 Correct 30 ms 12408 KB Output is correct
43 Correct 46 ms 12280 KB Output is correct
44 Correct 79 ms 12280 KB Output is correct
45 Correct 145 ms 12280 KB Output is correct
46 Correct 164 ms 12280 KB Output is correct
47 Correct 366 ms 12280 KB Output is correct
48 Correct 437 ms 12408 KB Output is correct

Subtask #3
0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 12024 KB Output is correct
2 Correct 13 ms 12152 KB Output is correct
3 Correct 13 ms 12152 KB Output is correct
4 Correct 12 ms 12152 KB Output is correct
5 Correct 12 ms 12024 KB Output is correct
6 Correct 10 ms 12024 KB Output is correct
7 Correct 10 ms 12024 KB Output is correct
8 Correct 11 ms 12024 KB Output is correct
9 Correct 12 ms 12152 KB Output is correct
10 Correct 10 ms 12024 KB Output is correct
11 Correct 12 ms 12152 KB Output is correct
12 Correct 10 ms 12152 KB Output is correct
13 Correct 10 ms 12152 KB Output is correct
14 Correct 10 ms 12152 KB Output is correct
15 Correct 10 ms 12152 KB Output is correct
16 Correct 10 ms 12152 KB Output is correct
17 Correct 10 ms 12152 KB Output is correct
18 Correct 10 ms 12152 KB Output is correct
19 Correct 10 ms 12152 KB Output is correct
20 Correct 10 ms 12024 KB Output is correct
21 Correct 9 ms 12028 KB Output is correct
22 Correct 10 ms 12024 KB Output is correct
23 Correct 10 ms 12024 KB Output is correct
24 Correct 10 ms 12152 KB Output is correct
25 Correct 295 ms 12536 KB Output is correct
26 Correct 298 ms 12408 KB Output is correct
27 Correct 300 ms 12536 KB Output is correct
28 Correct 296 ms 12536 KB Output is correct
29 Correct 346 ms 12516 KB Output is correct
30 Correct 381 ms 12536 KB Output is correct
31 Correct 365 ms 12508 KB Output is correct
32 Correct 372 ms 12664 KB Output is correct
33 Correct 15 ms 12536 KB Output is correct
34 Correct 14 ms 12540 KB Output is correct
35 Correct 14 ms 12536 KB Output is correct
36 Correct 15 ms 12636 KB Output is correct
37 Correct 13 ms 12636 KB Output is correct
38 Correct 12 ms 12664 KB Output is correct
39 Correct 13 ms 12408 KB Output is correct
40 Correct 15 ms 12408 KB Output is correct
41 Correct 20 ms 12280 KB Output is correct
42 Correct 30 ms 12408 KB Output is correct
43 Correct 46 ms 12280 KB Output is correct
44 Correct 79 ms 12280 KB Output is correct
45 Correct 145 ms 12280 KB Output is correct
46 Correct 164 ms 12280 KB Output is correct
47 Correct 366 ms 12280 KB Output is correct
48 Correct 437 ms 12408 KB Output is correct
49 Execution timed out 2056 ms 58516 KB Time limit exceeded
50 Halted 0 ms 0 KB -