oj.uz

답안 #241448

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
241448 2020-06-24T08:09:33 Z Vimmer Mag (COCI16_mag) C++14
12 / 120
 544 ms 262148 KB 
#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-O3")
#pragma GCC optimize("Ofast")
//#pragma GCC optimize("fast-math")
//#pragma GCC optimize("no-stack-protector")

#define F first
#define S second
#define sz(x) int(x.size())
#define pb push_back
#define N 1000501
#define M ll(1e9 + 7)
#define inf 1e9 + 1e9


using namespace std;
//using namespace __gnu_pbds;

typedef long double ld;
typedef long long ll;
typedef short int si;
typedef array <int, 3> a3;

//typedef tree <int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;


int a[N];

pair <ld, pair <ll, int> > f[N];

ld ans = -1;

ll l, r;

vector <int> g[N];

bool cmp(int x, int y)
{
    return f[y].F - f[x].F > 0;
}

void dfs(int v, int p)
{
    f[v] = {a[v], {a[v], 1}};

    vector <int> pr; pr.clear();

    for (auto it : g[v])
    {
        if (it == p) continue;

        dfs(it, v);

        pr.pb(it);

        ld sum = ld(f[it].S.F) * ld(a[v]);

        ld kol = ld(f[it].S.S + 1);

        ld res = ld(sum) / ld(kol);

        if (f[v].F - res > 0) f[v] = {res, {sum, kol}};
    }

    sort(pr.begin(), pr.end(), cmp);

    if (ans == -1 || ans - f[v].F > 0) {ans = f[v].F; l = f[v].S.F; r = f[v].S.S;}

    if (sz(pr) < 2) return;

    ll sum = f[pr[0]].S.F * f[pr[1]].S.F * a[v], kol = f[pr[0]].S.S + f[pr[1]].S.S + 1;

    ld res = ld(sum) / ld(kol);

    if (ans == -1 || ans - res > 0) {ans = res; l = sum; r = kol;}
}
int main()
{
    //freopen("input.txt", "r", stdin); //freopen("output4.txt", "w", stdout);

    ios_base::sync_with_stdio(0); istream::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    int n;

    cin >> n;

    for (int i = 1; i < n; i++)
    {
        int x, y;

        cin >> x >> y;

        g[x].pb(y);

        g[y].pb(x);
    }

    for (int i = 1; i <= n; i++)  cin >> a[i];

    dfs(1, -1);

    cout << l << "/" << r << endl;
}

Subtask #1
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 23936 KB Output is correct
2 Correct 19 ms 23936 KB Output is correct

Subtask #2
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 22 ms 23936 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 506 ms 164728 KB Output isn't correct

Subtask #4
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 23808 KB Output is correct
2 Runtime error 512 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 515 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)

Subtask #6
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 517 ms 90104 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 526 ms 92516 KB Output is correct
2 Correct 112 ms 30584 KB Output is correct
3 Runtime error 523 ms 262144 KB Execution killed with signal 9 (could be triggered by violating memory limits)

Subtask #8
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 133 ms 30584 KB Output is correct
2 Incorrect 535 ms 91896 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #9
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 521 ms 88380 KB Output is correct
2 Incorrect 544 ms 89324 KB Output isn't correct

Subtask #10
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 544 ms 91908 KB Output isn't correct
2 Halted 0 ms 0 KB -