Submission #422265

#	Time	Username	Problem	Language	Result	Execution time	Memory
422265		dreezy	Friend (IOI14_friend)	C++17	0 / 100	1 ms	384 KiB

friend

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


/*******************/
#define pi pair<int,int>
#define ll long long
#define f first
#define s second
#define pb push_back

struct UnionFind{
	vector<int> parent, height, sz;
	
	void init(int n){
		height.clear();
		height.assign(n, 0);
		parent.clear();
		parent.assign(n, 0);
		sz.clear();
		sz.assign(n, 1);
		for(int i=0; i<n ;i++){
			parent[i] = i;
			
		}
	}
	
	int root(int n){
		if(parent[n]!= n)
			parent[n] = root(parent[n]);
		return parent[n];
	}
	
	bool same(int n1, int n2){
		return root(n1) == root(n2);
	}
	
	void join(int n1, int n2){
		int r1 = root(n1);
		int r2 = root(n2);
		
		if(height[r1] > height[r2]){
			parent[r2] = r1;
			height[r1] = max(height[r1], height[r2] + 1);
			sz[r1] += sz[r2];
			//cout << sz[r1]<<"; "<<sz[r2]<<endl;
		}else{
			parent[r1] = r2;
			height[r2] = max(height[r2], height[r1] + 1);
			sz[r2]+=sz[r1];
			//cout << sz[r1]<<";; "<<sz[r2]<<endl;
		}
	}
	
};


int findSample(int n,int confidence[],int host[],int protocol[]){
	
	
	vector<bool> col(n);
	col[0] = 1;
	
	int ans[2] = {0,1};//col 0, col1
	for(int i =1; i<n; i++){

		if(protocol[i] == 1){
			col[i] = col[host[i]];
			ans[col[i]]++;
			//cout << i <<", "<<host[i]<<endl;
		}
		else{
			col[i] = !col[host[i]];
			ans[col[i]]++;
		}
	}

	
	return max(ans[0], ans[1]);
}

/*******************/

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