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Submission #922687

# Submission time Handle Problem Language Result Execution time Memory
922687 2024-02-06T01:58:54 Z thunopro Biochips (IZhO12_biochips) C++14
100 / 100
 241 ms 402256 KB 
#include <bits/stdc++.h>
using namespace std;
 
int N, M, p[200005], x[200005], rt;
vector <int> son[200005];
int timer = 0, dp[200005][505];
 
void dfs(int u){
	int pre = timer;
	for (int v : son[u]) dfs(v);
	timer++;
	for (int i = 1; i <= M; i++)
		dp[timer][i] = max(dp[pre][i-1]+x[u], dp[timer-1][i]);
}
 
int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	
	cin >> N >> M;
	for (int i = 1; i <= N; i++){
		cin >> p[i] >> x[i];
		if (!p[i]) rt = i;
		son[p[i]].push_back(i);
	}
	for (int i = 1; i <= M; i++) dp[0][i] = -1e9;
	dfs(0);
	cout << dp[timer][M];
	return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6236 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 3 ms 6492 KB Output is correct
4 Correct 11 ms 22876 KB Output is correct
5 Correct 12 ms 24892 KB Output is correct
6 Correct 16 ms 25000 KB Output is correct
7 Correct 169 ms 298864 KB Output is correct
8 Correct 176 ms 299076 KB Output is correct
9 Correct 205 ms 363348 KB Output is correct
10 Correct 241 ms 402256 KB Output is correct