Submission #532048

#	Time	Username	Problem	Language	Result	Execution time	Memory
532048		abc864197532	Coin Collecting (JOI19_ho_t4)	C++17	0 / 100	1 ms	204 KiB

joi2019_ho_t4

#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define mp make_pair
#define eb emplace_back
#define pb push_back
#define pii pair<int,int>
#define X first
#define Y second
#define all(x) x.begin(), x.end()
void abc() {cout << endl;}
template <typename T, typename ...U> void abc(T i, U ...j) {
	cout << i << ' ', abc(j...);
}
template <typename T> void printv(T l, T r) {
	for (; l != r; ++l)
		cout << *l << " \n"[l + 1 == r];
}
#ifdef Doludu
#define test(x...) abc("[" + string(#x) + "]", x)
#define owo freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
#else
#define test(x...) void(0)
#define owo ios::sync_with_stdio(false), cin.tie(0)
#endif

int main () {
	owo;
	srand(time(NULL));
	int n;
	cin >> n;
	vector <vector <int>> cnt(n, vector <int> (2, -1));
	lli ans = 0;
	for (int i = 0, x, y; i < n * 2; ++i) {
		cin >> x >> y, --x, --y;
		if (x < 0) {
			if (y <= 0)
				ans += -x - y, cnt[0][0]++;
			else
				ans += -x + y - 1, cnt[0][1]++;
		} else if (x >= n) {
			if (y <= 0)
				ans += x - n + 1 - y, cnt[n - 1][0]++;
			else
				ans += x - n + 1 + y - 1, cnt[n - 1][1]++;
		} else {
			if (y <= 0)
				ans += -y, cnt[x][0]++;
			else
				ans += y - 1, cnt[x][1]++;

		}
	}
	lli res = 1ll << 60;
	for (int t = 0; t < 1000; ++t) {
		vector <pii> source, sink;
		for (int i = 0; i < n; ++i) for (int j = 0; j < 2; ++j) {
			if (cnt[i][j] < 0)
				sink.eb(i, j);
			else {
				for (int k = 0; k < cnt[i][j]; ++k)
					source.eb(i, j);
			}
		}
		int m = source.size();
		if (!m) {
			res = 0;
			break;
		}
		if (t) {
			if (t & 1) {
				for (int i = 0; i < 10; ++i) {
					int x = rand() % m, y = rand() % m;
					if (rand() & 1)
						swap(source[x], source[y]);
					else
						swap(sink[x], sink[y]);
				}
			} else {
				random_shuffle(all(source));
				random_shuffle(all(sink));
			}
		}
		lli tmp = 0;
		for (int i = 0; i < m; ++i)
			tmp += abs(source[i].X - sink[i].X) + abs(source[i].Y - sink[i].Y);
		res = min(res, tmp);
	}
	cout << ans + res << endl;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 29
• Subtask 3: 0 / 63