oj.uz

답안 #627617

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
627617 2022-08-12T17:41:25 Z Huy Paths (RMI21_paths) C++17
36 / 100
 600 ms 21904 KB 
/// punch then pray
#include<bits/stdc++.h>
//#define int long long
#define pii pair<int,int>
#define fi first
#define se second
/*#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")*/
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ldb = long double;
const int N = (int)1e5 ;
const int maxN = (int)5e5 + 1;
const int mod = 1e9 + 7;
//const int mod = 998244353;
const ll infty = 1e18 + 7;
const int base = (int)4e5;
const int block_size = 710;

void InputFile()
{
    //freopen("palpath.in","r",stdin);
    //freopen("palpath.out","w",stdout);
    //freopen("test.inp","r",stdin);
    //freopen("test.out","w",stdout);
}

void FastInput()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

/// combining subtree nhung chi dua vao la ?
/// n log cho moi goc ?
/// n ^ 2 log full goc ?

int n,k;
vector<vector<pii>> adj;
int x[2005],y[2005],c[2005];
ll dp[2005][2005];
ll f[2005];
int subleaf[2005];

void Read()
{
    cin >> n >> k;
    adj.resize(n+1);
    for(int i = 1;i < n;i++)
    {
        cin >> x[i] >> y[i] >> c[i];
        adj[x[i]].push_back({y[i],c[i]});
        adj[y[i]].push_back({x[i],c[i]});
    }
}

void PreDFS(int u,int p)
{
    subleaf[u] = 1;
    int non_leaf = 0;
    for(pii e : adj[u])
    {
        int v = e.fi;
        int wt = e.se;
        if(v == p) continue;
        PreDFS(v,u);
        non_leaf = 1;
        subleaf[u] += subleaf[v];
    }
    subleaf[u] -= non_leaf;
}

void DFS(int u,int p)
{
    int sleaf = 0;
    for(pii e : adj[u])
    {
        int v = e.fi;
        int wt = e.se;
        if(v == p) continue;
        DFS(v,u);

        for(int i = 1;i <= min(k,sleaf + subleaf[v]);i++)
        {
            f[i] = 0;
        }

        for(int i = 0;i <= sleaf;i++)
        {
            f[i] = max(f[i],dp[u][i]);
            for(int j = 1;j <= min(subleaf[v],k);j++)
            {
                if(i + j > k) break;
                f[i+j] = max(f[i+j],dp[u][i] + dp[v][j] + wt);
            }
        }

        for(int i = 1;i <= min(k,sleaf + subleaf[v]);i++)
        {
            dp[u][i] = f[i];
        }

        sleaf += subleaf[v];
        sleaf = min(sleaf,k);
    }
}

void Prc_root(int id)
{
    PreDFS(id,0);
    DFS(id,0);
    ll res = 0;
    for(int i = 1;i <= n;i++)
    {
        //cout << subleaf[i] <<' ';
        for(int j = 1;j <= subleaf[i];j++)
        {
            res = max(res,dp[i][j]);
            dp[i][j] = 0;
        }
    }
    //cout << dp[7][2];
    cout << res <<'\n';
}

void Solve()
{
    for(int i = 1;i <= n;i++)
    {
        Prc_root(i);
    }
    //Prc_root(1);
}


int32_t main()
{
    FastInput();
    //InputFile();
    //int sub_type;
    //cin >> sub_type;
    //Sieve()
    int test;
    //cin >> test;
    test = 1;
    while(test--)
    {
        Read();
        Solve();
        //Debug();
    }
}
////
/////
//////

Compilation message

Main.cpp: In function 'void PreDFS(int, int)':
Main.cpp:68:13: warning: unused variable 'wt' [-Wunused-variable]
   68 |         int wt = e.se;
      |             ^~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct

Subtask #2
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 6 ms 1236 KB Output is correct
4 Correct 4 ms 1236 KB Output is correct
5 Correct 7 ms 1364 KB Output is correct
6 Correct 3 ms 1108 KB Output is correct
7 Correct 4 ms 1236 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 6 ms 1236 KB Output is correct
4 Correct 4 ms 1236 KB Output is correct
5 Correct 7 ms 1364 KB Output is correct
6 Correct 3 ms 1108 KB Output is correct
7 Correct 4 ms 1236 KB Output is correct
8 Correct 135 ms 8396 KB Output is correct
9 Correct 202 ms 6716 KB Output is correct
10 Correct 86 ms 5196 KB Output is correct
11 Correct 188 ms 9184 KB Output is correct
12 Correct 90 ms 5992 KB Output is correct

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 6 ms 1236 KB Output is correct
4 Correct 4 ms 1236 KB Output is correct
5 Correct 7 ms 1364 KB Output is correct
6 Correct 3 ms 1108 KB Output is correct
7 Correct 4 ms 1236 KB Output is correct
8 Correct 135 ms 8396 KB Output is correct
9 Correct 202 ms 6716 KB Output is correct
10 Correct 86 ms 5196 KB Output is correct
11 Correct 188 ms 9184 KB Output is correct
12 Correct 90 ms 5992 KB Output is correct
13 Execution timed out 1085 ms 21904 KB Time limit exceeded
14 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 6 ms 5716 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 6 ms 1236 KB Output is correct
4 Correct 4 ms 1236 KB Output is correct
5 Correct 7 ms 1364 KB Output is correct
6 Correct 3 ms 1108 KB Output is correct
7 Correct 4 ms 1236 KB Output is correct
8 Correct 135 ms 8396 KB Output is correct
9 Correct 202 ms 6716 KB Output is correct
10 Correct 86 ms 5196 KB Output is correct
11 Correct 188 ms 9184 KB Output is correct
12 Correct 90 ms 5992 KB Output is correct
13 Execution timed out 1085 ms 21904 KB Time limit exceeded
14 Halted 0 ms 0 KB -