Submission #671191

#	Time	Username	Problem	Language	Result	Execution time	Memory
671191		Ronin13	Friend (IOI14_friend)	C++14	100 / 100	23 ms	3408 KiB

friend

#include "friend.h"
#include <bits/stdc++.h>
#define ll long long
#define pll pair<ll,ll>
#define pb push_back
#define epb emplace_back
#define ull unsigned ll
#define f first
#define s second
#define pii pair<int,int>
using namespace std;
// Find out best sample
const int nmax = 1e5 + 1;
int dp[nmax][2];
int findSample(int n,int confidence[],int host[],int protocol[]){
    int ans = 0;
    for(int i = 0; i < n; i++){
        dp[i][0] = confidence[i];
        dp[i][1] = 0;
    }
    for(int i= n - 1; i > 0; i--){
        int p = host[i];
        if(protocol[i] == 0){
            dp[p][1] = max(dp[i][0], dp[i][1]) + dp[p][1];
            dp[p][0] = dp[p][0] + dp[i][1];
        }
        if(protocol[i] == 1){
            dp[p][0] = max({dp[p][0] + dp[i][1], dp[p][1] + dp[i][0], dp[i][0] + dp[p][0]});
            dp[p][1] = dp[p][1] + dp[i][1];
        }
        if(protocol[i] == 2){
            dp[p][0] = max({dp[p][0] + dp[i][1], dp[p][1] + dp[i][0]});
            dp[p][1] = dp[p][1] + dp[i][1];
        }
    }
	return max(dp[0][0], dp[0][1]);
}

Compilation message (stderr)

friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:16:9: warning: unused variable 'ans' [-Wunused-variable]
   16 |     int ans = 0;
      |         ^~~

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