Submission #518698

#	Time	Username	Problem	Language	Result	Execution time	Memory
518698		amukkalir	Friend (IOI14_friend)	C++17	0 / 100	3 ms	3448 KiB

friend

#include "friend.h"
#include <bits/stdc++.h>
typedef long long ll; 
using namespace std; 
#define pb push_back

const int nax = 1e5; 
int dp[nax+5][2]; 
int c[nax+5]; 
vector<int> adj[nax+5]; 
int n; 

int f(int u, int b) {
	int &ret = dp[u][b]; 
	if(~ret) return ret; 

	ret = 0; 
	if(adj[u].size() == 0) {
		return ret = b ? c[u] : 0; 
	}

	for(int v : adj[u]) {
		ret = max(ret, f(v, 1)); 
		if(b) {
			ret = max(ret, f(v, 0) + c[u]);  
		}
	}

	return ret; 
}

// Find out best sample
int findSample(int N,int confidence[],int host[],int protocol[]){
	n = N; 
	memset(dp, -1, sizeof dp); 
	c[0] = confidence[0]; 
	for(int i=1; i<N; i++) {
		//cout << i << " " << host[i] << endl; 
		c[i] = confidence[i]; 
		adj[host[i]].pb(i); 
	}

	return max(f(0,0), f(0,1)); 
}

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