Submission #587123

#	Time	Username	Problem	Language	Result	Execution time	Memory
587123		hibiki	Friend (IOI14_friend)	C++11	35 / 100	2 ms	468 KiB

friend

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

#define pb push_back

// Find out best sample
int ans = 0;
int con[1005];
vector<int> v[1005];
int dp[1005][2];

void dfs(int nw, int fa)
{
	dp[nw][0] = 0;
	dp[nw][1] = con[nw];
	for(auto go: v[nw])
	{
		if(go == fa) continue;
		dfs(go, nw);

		dp[nw][0] += max(dp[go][0], dp[go][1]);
		dp[nw][1] += dp[go][0];
	}
}

int findSample(int n,int c[],int h[],int p[]){
	int ty;
	for(int i = 0; i < n; i++)
		con[i] = c[i];
	for(int i = 1; i < n; i++)
		ty = p[i];
	// if(n < 20) ty = 3;
	if(ty == 0)
	{
		for(int i = 1; i < n; i++)
			v[h[i]].pb(i);
		dfs(0, -1);
		ans = max(dp[0][0], dp[0][1]);
	}
	else if(ty == 1)
	{
		for(int i = 0; i < n; i++)
			ans += c[i];
	}
	else if(ty == 2)
	{
		for(int i = 0; i < n; i++)
			ans = max(ans, c[i]);
	}
	else
	{

	}
	return ans;
}

Compilation message (stderr)

friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:41:7: warning: 'ty' may be used uninitialized in this function [-Wmaybe-uninitialized]
   41 |  else if(ty == 1)
      |       ^~

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