Submission #497005

#	Time	Username	Problem	Language	Result	Execution time	Memory
497005		Ziel	Coin Collecting (JOI19_ho_t4)	C++17	0 / 100	9 ms	248 KiB

joi2019_ho_t4

/**
 * LES GREATEABLES BRO TEAM
**/

#include <bits/stdc++.h>

using namespace std;

using ll = long long;
#define sz(x) (int)x.size()
const bool FLAG = false;
void setIO(const string &f = "");

string to_string(const string s) {
	return '"' + s + '"';
}
string to_string(const char c) {
 	return char(39) + string(1, c) + char(39);
}
string to_string(const char* s) {
 	return to_string(string(s));
}
string to_string(bool f) {
	return (f ? "true" : "false");
}
template<class A, class B>
string to_string(const pair<A, B> x) {
	return "(" + to_string(x.first) + ", " + to_string(x.second) + ")";
}
template<class A, class B, class C>
string to_string(const tuple<A, B, C> x) {
	return "(" + to_string(get<0>(x)) + ", " + to_string(get<1>(x)) + ", " + to_string(get<2>(x)) + ")";
}
template<class A, class B, class C, class D>
string to_string(const tuple<A, B, C, D> x) {
	return "(" + to_string(get<0>(x)) + ", " + to_string(get<1>(x)) + ", " + to_string(get<2>(x)) + ", " + to_string(get<3>(x)) + ")";
}
template<class T>
string to_string(const T v) {
	string res = "{"; bool f = true;
	for (auto x: v)
		res += (f ? to_string(x) : ", " + to_string(x)), f = false;
	return res + "}";
}
void debug_args() { cerr << "]\n"; }
template<class H, class... T>
void debug_args(H x, T... y) {
	cerr << to_string(x);
	if (sizeof... (y))
	cerr << ", ";
	debug_args(y...);
}

#ifdef LOCAL
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]: [", debug_args(__VA_ARGS__);
#else
#define debug(...) 47
#endif

const int N = 3e5 + 12;
#define int ll
int a[N], cnt[N][3];
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void solve() {
    int n;
    cin >> n;
    ll ans = 0;
    vector<pair<int, int>> v1;
    for (int i = 0; i < n + n; i++) {
    	int x, y;
    	cin >> x >> y;
    	v1.push_back({x, y});
    }
    
    vector<pair<int, int>> v2;
	for (int i = 1; i <= n; i++) {
		v2.push_back({i, 1});
		v2.push_back({i, 2});
	}

	int mn = 1e15 + 1532;
	for (int _ = 0; _ < 15000; _++) {
		shuffle(v1.begin(), v1.end(), rng);
		shuffle(v2.begin(), v2.end(), rng);

		int cur = 0;
		for (int i = 0; i < sz(v1); i++) {
			cur += abs(v1[i].first - v2[i].first) + abs(v1[i].second - v2[i].second);
		}
		mn = min(mn, cur);
	}

	cout << ans + mn;
}

signed main() {
    setIO();
    
    int tt = 1;
    if (FLAG) {
    	cin >> tt;
    }
    while (tt--) {
    	solve();
    }
    
    return 0;
}

void setIO(const string &f) {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen((f + ".in").c_str(), "r")) {
        freopen((f + ".in").c_str(), "r", stdin);
        freopen((f + ".out").c_str(), "w", stdout);
    }
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'void setIO(const string&)':
joi2019_ho_t4.cpp:115:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  115 |         freopen((f + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t4.cpp:116:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  116 |         freopen((f + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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