oj.uz

답안 #1114183

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1114183 2024-11-18T09:47:20 Z n3rm1n Magic Tree (CEOI19_magictree) C++17
0 / 100
 2000 ms 68936 KB 
#include<bits/stdc++.h>
//define endl '\n'
using namespace std;
const int MAXN = 2e5 + 10, MAXK = 22;
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
int n, m, k;
int p[MAXN];
long long v[MAXN], d[MAXN], w[MAXN];
vector < int > g[MAXN];
pair < int, int > f[MAXN];
long long leaf[MAXN], total = 0;

void read()
{
    cin >> n >> m >> k;
    for (int i = 1; i <= n; ++ i)
        leaf[i] = 1;
    for (int i = 2; i <= n; ++ i)
    {
        cin >> p[i];
        g[p[i]].push_back(i);
        leaf[p[i]] = 1;
    }
    bool no = 0;
    for (int i = 1; i <= m; ++ i)
    {
        cin >> v[i] >> d[i] >> w[i];

        total += w[i];
        f[v[i]] = make_pair(d[i], w[i]);
    }

}
bool cmp(pair < int, int > p1, pair < int, int > p2)
{
    return (p1.first > p2.first);
}
long long sub[MAXN][MAXK], dp[MAXN][MAXK], pref[MAXN][MAXK];
void dfs(int beg, int par)
{

    int dd = f[beg].first;
    if(dd)sub[beg][dd] += f[beg].second;
    long long sum = 0;
    for (auto nb: g[beg])
    {
        if(nb == par)continue;
        dfs(nb, beg);
        for (int i = 1; i <= k; ++ i)
            sub[beg][i] += sub[nb][i];
    }
    for (int from = 1; from <= k; ++ from)
    {
        for (int to = 1; to <= k; ++ to)
        {
            dp[beg][to] = max(dp[beg][to], sub[beg][from] - (sub[beg][to]));
        }
    }
    for (int day = 1; day <= k; ++ day)
    {
        long long cost = 0;
        cost += sub[beg][day];
        long long sum = 0;
        for (auto nb: g[beg])
            sum += dp[nb][day];
        cost += sum;
        dp[beg][day] = max(dp[beg][day], cost);
        pref[beg][day] = max(dp[beg][day], dp[beg][day-1]);
    }

}
int main()
{
    speed();

    read();

    vector < pair < int, int > > f;
    vector < pair < int, int > > s;
    long long ans = 0;
    for (auto x: g[1])
    {

        dfs(x, 1);

        ans = ans + dp[x][k];
    }
    cout << ans << endl;
    return 0;
}
/***
7 5 2
1 2 2 1 4 4
2 2 1
3 2 1
4 1 1
6 1 1
5 1 10
*/

Compilation message

magictree.cpp: In function 'void read()':
magictree.cpp:29:10: warning: unused variable 'no' [-Wunused-variable]
   29 |     bool no = 0;
      |          ^~
magictree.cpp: In function 'void dfs(int, int)':
magictree.cpp:49:15: warning: unused variable 'sum' [-Wunused-variable]
   49 |     long long sum = 0;
      |               ^~~

Subtask #1
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 14672 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 2041 ms 17232 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 711 ms 17312 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 57 ms 68936 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 14672 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 2048 ms 13648 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 14672 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 14672 KB Output isn't correct
2 Halted 0 ms 0 KB -