oj.uz

답안 #921776

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
921776 2024-02-04T10:01:41 Z sleepntsheep Magic Tree (CEOI19_magictree) C++17
3 / 100
 116 ms 21596 KB 
#include <iostream>
#include <fstream>
#include <iomanip>
#include <cmath>
#include <cassert>
#include <cstring>
#include <vector>
#include <algorithm>
#include <deque>
#include <set>
#include <utility>
#include <array>
#include <complex>

using u32 = unsigned;
using i32 = int;
using i64 = long long;
using u64 = unsigned long long;
using f64 = double;
using f80 = long double;

#define int long long
using namespace std;
using pt = complex<f80>;
#define ALL(x) begin(x), end(x)
#define ShinLena cin.tie(nullptr)->sync_with_stdio(false);
#define N 100005

set<pair<int, i64>> s[N];


int n, m, k; 
i64 dp[N];
basic_string<int> g[N];

void dfs(int u)
{
    i64 nocur = 0, cur = 0, fruit = s[u].size(), d;
    if (fruit) tie(d, cur) = *s[u].begin();

    for (auto v : g[u])
    {
        dfs(v);
        nocur += dp[v];
        if (s[v].size() > s[u].size()) s[v].swap(s[u]);
        i64 curthis = 0;
        for (auto &[x, x2] : s[v])
        {
            if (x <= d) curthis += x2;
            auto it = s[u].lower_bound(make_pair(x, 0));
            if (it != s[u].end() and it->first == x)
            {
                int nw = it->second + x2;
                s[u].erase(it);
                s[u].emplace(x, nw);
            }
            else s[u].emplace(x, x2);
        }
        cur += curthis;
        set<pair<int, i64>>().swap(s[v]);
    }

    if (!fruit) return void(dp[u] = nocur);

    dp[u] = max(cur, nocur);
}

signed main()
{
    ShinLena;
    cin >> n >> m >> k;
    for (int i = 2, p; i <= n; ++i) cin >> p, g[p].push_back(i);
    for (int v, d, w, i = 0; i < m; ++i)
    {
        cin >> v >> d >> w;
        s[v].emplace(d, w);
    }
    dfs(1);
    cout << dp[1];

    return 0;
}

Compilation message

magictree.cpp: In function 'void dfs(long long int)':
magictree.cpp:49:13: warning: 'd' may be used uninitialized in this function [-Wmaybe-uninitialized]
   49 |             if (x <= d) curthis += x2;
      |             ^~

Subtask #1
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9052 KB Output is correct
2 Correct 2 ms 9052 KB Output is correct
3 Incorrect 2 ms 9052 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 41 ms 12980 KB Output is correct
2 Correct 31 ms 21596 KB Output is correct
3 Correct 116 ms 18460 KB Output is correct
4 Correct 64 ms 17360 KB Output is correct
5 Correct 83 ms 20556 KB Output is correct

Subtask #3
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 9304 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 58 ms 15700 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9052 KB Output is correct
2 Correct 2 ms 9052 KB Output is correct
3 Incorrect 2 ms 9052 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 5 ms 9308 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9052 KB Output is correct
2 Correct 2 ms 9052 KB Output is correct
3 Incorrect 2 ms 9052 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9052 KB Output is correct
2 Correct 2 ms 9052 KB Output is correct
3 Incorrect 2 ms 9052 KB Output isn't correct
4 Halted 0 ms 0 KB -