Submission #702069

#	Time	Username	Problem	Language	Result	Execution time	Memory
702069		PCTprobability	Friend (IOI14_friend)	C++17	27 / 100	3 ms	2700 KiB

friend

#include <bits/stdc++.h>
#include "friend.h"
using namespace std;
using ll = long long;
#define pb push_back
vector<int> g[100000];
int dp[100000][2];
ll con[100000];
void dfs(int a,int b){
  for(auto e:g[a]){
    if(e==b) continue;
    dfs(e,a);
    dp[a][0]+=max(dp[e][0],dp[e][1]);
    dp[a][1]+=dp[e][0];
  }
  dp[a][1]+=con[a];
}
int findSample(int n, int confidence[], int host[], int protocol[]){
  for(int i=0;i<n;i++) con[i]=confidence[i];
  for(int i=n-1;i>=1;i--){
    dp[i][1]+=con[i];
    dp[i][1]=max(dp[i][1],dp[i][0]);
    if(protocol[i]==0){
      dp[host[i]][0]+=dp[i][1];
      dp[host[i]][1]+=dp[i][0];
    }
    if(protocol[i]==1){
      dp[host[i]][0]+=dp[i][0];
      dp[host[i]][1]+=dp[i][1];
    }
    if(protocol[i]==2){
    }
  }
  dp[0][1]+=con[0];
  return max(dp[0][1],dp[0][0]);
}

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