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Submission #856507

# Submission time Handle Problem Language Result Execution time Memory
856507 2023-10-03T18:20:31 Z aykhn Biochips (IZhO12_biochips) C++14
10 / 100
 2000 ms 258000 KB 
#include <bits/stdc++.h>

// author : aykhn

using namespace std;
typedef long long ll;

#define pb push_back
#define ins insert
#define mpr make_pair
#define all(v) v.begin(), v.end()
#define bpc __builtin_popcount
#define pii pair<int, int>
#define pll pair<ll, ll>
#define fi first
#define se second
#define int ll
#define infll 0x3F3F3F3F3F3F3F3F
#define inf 0x3F3F3F3F

const int MXN = 2e5 + 5;
const int MXM = 5e2 + 5;

int n, m, r;
vector<int> adj[MXN];
int p[MXN], c[MXN];
int dp[MXN][MXM];

void dfs(int a)
{
    for (int v : adj[a]) dfs(v);
    int n1 = adj[a].size();
    vector<vector<int>> dp1(n1 + 1, vector<int> (m + 1, 0));
    for (int i = 1; i <= adj[a].size(); i++)
    {
        int v = adj[a][i - 1];
        for (int j = 1; j <= m; j++)
        {
            for (int k = 0; k <= j; k++)
            {
                dp1[i][j] = max(dp1[i][j], dp1[i - 1][j - k] + dp[v][k]);
            }
        }
    }
    dp[a][1] = max(c[a], dp[a][1]);
    for (int i = 2; i <= m; i++) dp[a][i] = dp1[n1][i];
}

signed main()
{
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
    {
        cin >> p[i] >> c[i];
        if (!p[i])
        {
            r = i;
            continue;
        }
        adj[p[i]].pb(i);
    }
    dfs(r);
    cout << dp[r][m] << '\n';
}

Compilation message

biochips.cpp: In function 'void dfs(ll)':
biochips.cpp:34:23: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |     for (int i = 1; i <= adj[a].size(); i++)
      |                     ~~^~~~~~~~~~~~~~~~

Subtask #1
10.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 8536 KB Output isn't correct
2 Incorrect 1 ms 8540 KB Output isn't correct
3 Correct 2 ms 9052 KB Output is correct
4 Incorrect 37 ms 43868 KB Output isn't correct
5 Incorrect 51 ms 48212 KB Output isn't correct
6 Incorrect 71 ms 48212 KB Output isn't correct
7 Execution timed out 2078 ms 258000 KB Time limit exceeded
8 Execution timed out 2064 ms 255012 KB Time limit exceeded
9 Execution timed out 2047 ms 116616 KB Time limit exceeded
10 Execution timed out 2070 ms 83796 KB Time limit exceeded