Submission #204809

#	Time	Username	Problem	Language	Result	Execution time	Memory
204809		awlintqaa	Friend (IOI14_friend)	C++14	19 / 100	5 ms	376 KiB

friend

#define fast ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#include <bits/stdc++.h>
using namespace std;
#define sqr 200
#define mid (l+r)/2
#define pb push_back
#define ppb pop_back
#define fi first
#define se second
#define lb lower_bound
#define ub upper_bound
#define ins insert
#define era erase
#define C continue
#define mem(dp,i) memset(dp,i,sizeof(dp))
#define mset multiset
typedef long long ll;
typedef short int si;
typedef long double ld;
typedef pair<int,int> pi;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pi> vpi;
typedef vector<pll> vpll;
const ll mod=1e9+7;
const ll inf= 4e18;
const ld pai=acos(-1);
#include "friend.h"
vi v[1009];;
int val[1009];
int dp[1009][2];
int done[1009];
void dfs(int node){
        done[node]=1;
        dp[node][1]=val[node];
        for(auto u:v[node]){
                dfs(u);
                dp[node][1]+=dp[u][0];
                dp[node][0]+=max(dp[u][1],dp[u][0]);
        }
}
int findSample(int n,int confidence[],int host[],int protocol[]){
        for(int i=0;i<n;i++)val[i]=confidence[i];
        for(int i=1;i<n;i++){
                int a=i,b=host[i];
                v[b].pb(a);
        }
        int ans=0;
        for(int i=0;i<n;i++){
                if(!done[i]){
                        dfs(i);
                        ans+=max(dp[i][0],dp[i][1]);
                }
        }
        return ans;
}

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