Submission #587114

#	Time	Username	Problem	Language	Result	Execution time	Memory
587114		hibiki	Friend (IOI14_friend)	C++11	8 / 100	1 ms	348 KiB

friend

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

#define pb push_back

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

int fi(int idx)
{
	if(l[idx] == idx) return idx;
	return l[idx] = fi(l[idx]);
}

void uni(int la, int lb)
{
	if(la != lb)
		ans -= min(best[la], best[la]);
	best[lb] = max(best[la], best[lb]);
	l[la] = lb;
}

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

	}
}

int findSample(int n,int c[],int h[],int p[]){
	int ty;
	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), v[i].pb(h[i]);
	}
	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 += c[i];
		for(int i = 0; i < n; i++)
			l[i] = i, best[i] = c[i];
		for(int i = 1; i < n; i++)
			uni(fi(h[i]), fi(i));
	}
	else
	{

	}
	return ans;
}

Compilation message (stderr)

friend.cpp: In function 'void dfs(int, int)':
friend.cpp:30:11: warning: unused variable 'go' [-Wunused-variable]
   30 |  for(auto go: v[nw])
      |           ^~
friend.cpp: In function 'int findSample(int, int*, int*, int*)':
friend.cpp:46:7: warning: 'ty' may be used uninitialized in this function [-Wmaybe-uninitialized]
   46 |  else if(ty == 1)
      |       ^~

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