Submission #499899

#	Time	Username	Problem	Language	Result	Execution time	Memory
499899		jesus_coconut	Table Tennis (info1cup20_tabletennis)	C++17	9 / 100	3075 ms	30916 KiB

tabletennis

#include <bits/stdc++.h>
#define pb push_back
#define all(a) begin(a), end(a)
using namespace std;

int n, k;
vector<int> v;
void load() {
	cin >> n >> k;
	v.resize(n + k);
	for (auto &it : v) cin >> it;
}

int const N = 150005;

int ans[N];

bool solve(int suma) {
	int l = 0, r = n + k - 1;
	int cnt = 0;
	int p = 0;
	while (l < r && cnt <= k) {
		if (v[l] + v[r] == suma) {
			ans[p++] = v[l];
			ans[p++] = v[r];
			if (p == n) return true;
			++l;
			--r;
		} else if (v[l] + v[r] < suma) {
			++l;
			++cnt;
		} else {
			--r;
			++cnt;
		}
	}
	return false;
}

map<int, int> mp;

void solve() {
	vector<int> tmp;
	for (int at = 1; ; ++at) {
		for (int t = 0; t < 100 * k; ++t) {
			int i = rand() % (n + k);
			int j = n + k - 1 - i - (rand() % (2 * k + 1));
			if (i >= j || j >= n + k) continue;
			if (mp[v[i]+v[j]]++ == 0) {
				tmp.pb(v[i] + v[j]);
			};
		}
		sort(all(tmp), [&](int const &a, int const &b) { return mp[a] > mp[b]; });
		for (auto a: tmp) {
			if (solve(a)) {
				sort(ans, ans + n);
				for (int i = 0; i < n; ++i) {
					cout << ans[i] << ' ';
				}
				return;
			}
		}
		tmp.clear();
	}
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	load();
	sort(all(v));
	solve();

	return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 9
• Subtask 3: 0 / 14
• Subtask 4: 0 / 15
• Subtask 5: 9 / 9
• Subtask 6: 0 / 14
• Subtask 7: 0 / 15
• Subtask 8: 0 / 13