oj.uz

Submission #388030

# Submission time Handle Problem Language Result Execution time Memory
388030 2021-04-09T18:57:12 Z b00n0rp Biochips (IZhO12_biochips) C++17
100 / 100
 355 ms 400896 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define FOR(i,a,b) for (int i = a; i < b; i++)
typedef vector<int> vi;
 
const int INF=1e9;
const int MAXN = 200005;
 
int n,m,root;
vi g[MAXN];
int par[MAXN],a[MAXN],st[MAXN],fin[MAXN];
int tim = 0;
int dp[MAXN][505];
 
void dfs(int u){
    st[u] = tim;
    for(auto v:g[u]) dfs(v);
    for(int i=1;i<=m;i++){
        dp[tim+1][i] = max(dp[tim][i],dp[st[u]][i-1]+a[u]);
    }
    tim++;
}   
 
signed main(){
    cin >> n >> m;
    for(int i=1;i<=n;i++){
        int p;
        cin >> p >> a[i];
        if(!p) root = i;
        else g[p].push_back(i);
    }
    for(int i=1;i<=m;i++) dp[0][i] = -INF;
    dfs(root);
    cout << dp[n][m] << "\n";
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 5196 KB Output is correct
4 Correct 16 ms 22732 KB Output is correct
5 Correct 17 ms 24964 KB Output is correct
6 Correct 17 ms 24908 KB Output is correct
7 Correct 262 ms 298828 KB Output is correct
8 Correct 260 ms 298764 KB Output is correct
9 Correct 297 ms 363304 KB Output is correct
10 Correct 355 ms 400896 KB Output is correct