Submission #404171

#	Time	Username	Problem	Language	Result	Execution time	Memory
404171		peuch	Friend (IOI14_friend)	C++17	19 / 100	1 ms	332 KiB

friend

#include "friend.h"
#include<bits/stdc++.h>
using namespace std;

const int MAXN = 1e3 + 10;

int dp[MAXN][2];
int v[MAXN];

vector<int> ar[MAXN];

void dfs(int cur);

int findSample(int n,int confidence[],int host[],int protocol[]){
	
	memset(dp, -1, sizeof(dp));
	
	for(int i = 0; i < n; i++)
		v[i] = confidence[i];
	for(int i = 1; i < n; i++)
		ar[host[i]].push_back(i);
 	dfs(0);
	return dp[0][1];
}

void dfs(int cur){
	dp[cur][0] = 0;
	dp[cur][1] = v[cur];
	for(int i = 0; i < ar[cur].size(); i++){
		int viz = ar[cur][i];
		dfs(viz);
		dp[cur][0] += dp[viz][1];
		dp[cur][1] += dp[viz][0];
	}
	dp[cur][1] = max(dp[cur][1], dp[cur][0]);
}

Compilation message (stderr)

friend.cpp: In function 'void dfs(int)':
friend.cpp:29:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |  for(int i = 0; i < ar[cur].size(); i++){
      |                 ~~^~~~~~~~~~~~~~~~

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