Submission #830235

#	Time	Username	Problem	Language	Result	Execution time	Memory
830235		GusterGoose27	Split the Attractions (IOI19_split)	C++17	0 / 100	2 ms	2652 KiB

split

#include "split.h"

#include <bits/stdc++.h>

using namespace std;

typedef pair<int, int> pii;

const int MAXN = 1e5+5;
int n, m;

vector<int> edges[MAXN];
vector<int> res;

void dfs(int cur, int &b, int col) {
	if (b == 0) return;
	res[cur] = col;
	b--;
	for (int nxt: edges[cur]) {
		dfs(nxt, b, col);
	}
}

vector<int> find_split(int N, int a, int b, int c, vector<int> p, vector<int> q) {
	n = N;
	m = p.size();
	vector<pii> change({{a, 1}, {b, 2}, {c, 3}});
	sort(change.begin(), change.end());
	a = change[0].first;
	b = change[1].first;
	for (int i = 0; i < m; i++) {
		edges[p[i]].push_back(q[i]);
		edges[q[i]].push_back(p[i]);
	}
	int s = 0;
	for (int i = 0; i < n; i++) if (edges[i].size() == 1) s = i;
	res = vector<int>(n, 2);
	dfs(s, b, 0);
	for (int i = 0; i < n; i++) {
		if (res[i] == 2) {
			dfs(i, a, 1);
			break;
		}
	}
	for (int i = 0; i < n; i++) res[i] = change[res[i]].second;
	return res;
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 24
• Subtask 5: 0 / 36