Submission #723628

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
723628	2023-04-14 06:34:11	MDSPro	Magic Tree (CEOI19_magictree)	C++17	37 / 100	255 ms	33952 KiB

magictree

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#include "bits/stdc++.h"
using namespace std;
const int MAXN = 1e5+10;
const int INF = 1e9;
int n,m,k;
vector<int> cost;
vector<int> rday;
vector<vector<int>> g;
long long dp[MAXN][25];
long long get(int v, int md){
    if(dp[v][md] != -1) return dp[v][md];
    if(md == 0) return dp[v][md] = 0;
    dp[v][md] = (rday[v] == md ? cost[v] : 0);
    for(int z: g[v]) dp[v][md] += get(z,md);
    return dp[v][md] = max(dp[v][md],get(v,md-1));
}
int main(){
    cin >> n >> m >> k;
    g.resize(n+1);
    cost.reserve(n+1);
    rday.assign(n+1,INF);
    for(int i = 2,x; i <= n; ++i){
        cin >> x;
        g[x].emplace_back(i);
 
 
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