Submission #780313

#	Time	Username	Problem	Language	Result	Execution time	Memory
780313		NothingXD	Friend (IOI14_friend)	C++17	23 / 100	2 ms	340 KiB

friend

#include "friend.h"
#include<bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef complex<ld> point;

void debug_out(){cerr << endl;}

template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T){
	cout << H << ' ';
	debug_out(T...);
}

#define debug(...) cerr << "(" << #__VA_ARGS__ << "): ", debug_out(__VA_ARGS__)
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define MP(x, y) make_pair(x, y)

const int maxn = 1e3 + 10;

int col[maxn], match[maxn];
vector<int> g[maxn];
bool vis[maxn];

bool dfs(int v){
	vis[v] = true;
	for (auto u: g[v]){
		if (match[u] == -1 || (!vis[match[u]] && dfs(match[u]))){
			match[u] = v;
			return true;
		}
	}
	return false;
}

// Find out best sample
int findSample(int n,int w[],int p[],int t[]){

	memset(match, -1, sizeof match);
	
	for (int i = 1; i < n; i++){
		if (t[i] == 2) return -1;
		if (t[i] == 0){
			col[i] = 1 - col[p[i]];
			g[p[i]].push_back(i);
			g[i].push_back(p[i]);
			continue;
		}
		col[i] = col[p[i]];
		for (auto u: g[p[i]]){
			g[u].push_back(i);
			g[i].push_back(u);
		}
	}
	int ans = 0;
	for (int i = 0; i < n; i++){
		if (col[i] == 1) continue;
		memset(vis, false, sizeof vis);
		ans += dfs(i);
	}

	return n-ans;
}

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