oj.uz

Submission #167077

# Submission time Handle Problem Language Result Execution time Memory
167077 2019-12-05T13:05:30 Z hentai_lover Hard route (IZhO17_road) C++14
19 / 100
 2000 ms 123524 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

#pragma GCC optimize("-O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")

#define pb push_back
#define fr(i, l, r) for(ll i = l; i <= r; ++ i)
#define rf(i, l, r) for(ll i = l; i >= r; -- i)

using namespace std;
using namespace __gnu_pbds;

template <typename T>
using _set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

typedef int ll;
typedef pair<ll, ll> pll;

const ll oo = ll(1e9) + 10;
const ll N = 5010;

ll f[N][N];
ll n, x, y, now;
vector <ll> g[N];
unordered_map <ll, ll> mp;

void dfs(ll x, ll s = 0, ll p = -1){
    f[now][x] = s;
    for(auto i : g[x])
        if(i != p){
            dfs(i, s + 1, x);
            f[now][x] = max(f[now][x], f[now][i]);
        }
}

void dfs2(ll x, ll s = 0, ll pp = -1, ll nw = 0){
    ll m1 = nw, m2 = nw;
    for(auto i : g[x])
        if(i != pp){
            if(m1 <= f[x][i])m2 = m1, m1 = f[x][i];
            else if(m2 <= f[x][i])m2 = f[x][i];
        }
    for(auto i : g[x]){
        if(i != pp){
            if(f[x][i] != m1){
                dfs2(i, s + 1, x, m1);
            }   else{
                dfs2(i, s + 1, x, m2);
            }
        }
    }
    //cout << "x = " << x << " nw = " << nw << " s = " << s << " now = " << now << endl;
    if(g[x].size() == 1 && s != 0){
        //cout << "true" << endl;
        mp[nw * s] ++;
    }

}

int main() {
    //ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    cin >> n;
    fr(i, 2, n){
        cin >> x >> y;
        g[x].pb(y);
        g[y].pb(x);
    }

    fr(i, 1, n){
        now = i;
        dfs(i);
    }

    fr(i, 1, n){
        if(g[i].size() == 1){
            now = i;
            dfs2(i);

        }
    }


    pll ans;
    for(auto i : mp){
        pll z = i;
        ans = max(ans, z);
    }
    cout << ans.first << ' ' << ans.second / 2 << endl;
}


/*
3 3
1 5 1
2 3
1 3 5
2 3
*/

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 3 ms 888 KB Output is correct
8 Correct 3 ms 888 KB Output is correct
9 Correct 3 ms 888 KB Output is correct
10 Correct 3 ms 888 KB Output is correct
11 Correct 3 ms 888 KB Output is correct
12 Correct 3 ms 888 KB Output is correct
13 Correct 3 ms 888 KB Output is correct
14 Correct 3 ms 888 KB Output is correct
15 Correct 3 ms 888 KB Output is correct
16 Correct 3 ms 888 KB Output is correct
17 Correct 3 ms 892 KB Output is correct
18 Correct 3 ms 888 KB Output is correct
19 Correct 3 ms 888 KB Output is correct
20 Correct 3 ms 888 KB Output is correct
21 Correct 3 ms 888 KB Output is correct
22 Correct 3 ms 888 KB Output is correct
23 Correct 3 ms 860 KB Output is correct
24 Correct 3 ms 888 KB Output is correct

Subtask #2
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 3 ms 888 KB Output is correct
8 Correct 3 ms 888 KB Output is correct
9 Correct 3 ms 888 KB Output is correct
10 Correct 3 ms 888 KB Output is correct
11 Correct 3 ms 888 KB Output is correct
12 Correct 3 ms 888 KB Output is correct
13 Correct 3 ms 888 KB Output is correct
14 Correct 3 ms 888 KB Output is correct
15 Correct 3 ms 888 KB Output is correct
16 Correct 3 ms 888 KB Output is correct
17 Correct 3 ms 892 KB Output is correct
18 Correct 3 ms 888 KB Output is correct
19 Correct 3 ms 888 KB Output is correct
20 Correct 3 ms 888 KB Output is correct
21 Correct 3 ms 888 KB Output is correct
22 Correct 3 ms 888 KB Output is correct
23 Correct 3 ms 860 KB Output is correct
24 Correct 3 ms 888 KB Output is correct
25 Correct 988 ms 98892 KB Output is correct
26 Correct 999 ms 99112 KB Output is correct
27 Correct 997 ms 98936 KB Output is correct
28 Correct 1036 ms 99192 KB Output is correct
29 Execution timed out 2059 ms 123524 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #3
0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 380 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 3 ms 888 KB Output is correct
8 Correct 3 ms 888 KB Output is correct
9 Correct 3 ms 888 KB Output is correct
10 Correct 3 ms 888 KB Output is correct
11 Correct 3 ms 888 KB Output is correct
12 Correct 3 ms 888 KB Output is correct
13 Correct 3 ms 888 KB Output is correct
14 Correct 3 ms 888 KB Output is correct
15 Correct 3 ms 888 KB Output is correct
16 Correct 3 ms 888 KB Output is correct
17 Correct 3 ms 892 KB Output is correct
18 Correct 3 ms 888 KB Output is correct
19 Correct 3 ms 888 KB Output is correct
20 Correct 3 ms 888 KB Output is correct
21 Correct 3 ms 888 KB Output is correct
22 Correct 3 ms 888 KB Output is correct
23 Correct 3 ms 860 KB Output is correct
24 Correct 3 ms 888 KB Output is correct
25 Correct 988 ms 98892 KB Output is correct
26 Correct 999 ms 99112 KB Output is correct
27 Correct 997 ms 98936 KB Output is correct
28 Correct 1036 ms 99192 KB Output is correct
29 Execution timed out 2059 ms 123524 KB Time limit exceeded
30 Halted 0 ms 0 KB -