Submission #742211

#	Time	Username	Problem	Language	Result	Execution time	Memory
742211		MODDI	Friend (IOI14_friend)	C++14	19 / 100	2 ms	468 KiB

friend

#include "friend.h"
#include <bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define mp make_pair
#define vi vector<int>
using namespace std;
vi G[1101], add;
// Find out best sample
ll dp[1101][2];
void dfs(int at, int p){
	dp[at][0] = add[at];
	dp[at][1] = 0;
	vi children;
	for(auto next : G[at]){
		if(next == p)	continue;
		
		dfs(next, at);
		children.pb(next);
	}
	for(auto t :children){
		dp[at][0] += dp[t][1];
		dp[at][1] += max(dp[t][0], dp[t][1]);
	}
}
int findSample(int n,int confidence[],int host[],int protocol[]){
	add.resize(n);
	for(int i = 0; i < n; i++)
		add[i] = confidence[i];
	for(int i = 1; i < n; i++){
		G[host[i]].pb(i);
		G[i].pb(host[i]);	
	}
	dfs(0, 0);
	return max(dp[0][0], dp[0][1]);
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 8
• Subtask 3: 0 / 8
• Subtask 4: 19 / 19
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31