제출 #1303370

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1303370		Thanhs	Village (BOI20_village)	C++20	12 / 100	1096 ms	12208 KiB

Village

#include <bits/stdc++.h>
using namespace std;

#define name "TENBAI"
#define fi first
#define se second
#define int long long
#define endl '\n'
#define setmin(x, y) x = min((x), (y))
#define setmax(x, y) x = max((x), (y))
#define sqr(x) ((x) * (x))
#define all(x) x.begin(), x.end()

mt19937 hdp(chrono::high_resolution_clock::now().time_since_epoch().count());
int rand(int l, int r){return l + ((hdp() % (r - l + 1)) + r - l + 1) % (r - l + 1);}

const int NM = 1e5 + 5;
const int LG = 20;

pair<int, int> st[NM][LG];
int n, dep[NM], tin[NM], timer;
vector<int> g[NM];

void dfs(int u)
{
	st[++timer][0] = {dep[u], u};
	tin[u] = timer;
	for (int v : g[u])
	{
		g[v].erase(find(all(g[v]), u));
		dep[v] = dep[u] + 1;
		dfs(v);
		st[++timer][0] = {dep[u], u};
	}
}

int lca(int u, int v)
{
	u = tin[u], v = tin[v];
	if (u > v)
		swap(u, v);
	int lg = __lg(v - u + 1);
	return min(st[u][lg], st[v - (1 << lg) + 1][lg]).se;
}

void solve()
{
	cin >> n;
	for (int i = 1; i < n; i++)
	{
		int u, v;
		cin >> u >> v;
		g[u].push_back(v);
		g[v].push_back(u);
	}
	dfs(1);
	for (int i = 1; (1 << i) <= timer; i++)
		for (int j = 1; j + (1 << i) - 1 <= timer; j++)
			st[j][i] = min(st[j][i - 1], st[j + (1 << i - 1)][i - 1]);
	pair<int, vector<int>> mn, mx;
	mn.fi = 1e9, mx.fi = 0;
	vector<int> p(n);
	iota(all(p), 1);
	do
	{
		bool chet = 0;
		int sum = 0;
		for (int i = 1; i <= n; i++)
		{
			int j = p[i - 1];
			if (i == j)
				chet = 1;
			sum += dep[i] + dep[j] - 2 * dep[lca(i, j)];
		}
		if (chet)
			continue;
		setmin(mn, make_pair(sum, p));
		setmax(mx, make_pair(sum, p));
	}while(next_permutation(all(p)));
	cout << mn.fi << ' ' << mx.fi << endl;
	for (int t : mn.se)
		cout << t << ' ';
	cout << endl;
	for (int t : mx.se)
		cout << t << ' ';
}

signed main()
{
    if (fopen("in.txt", "r")) 
    {
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
    }
    else if (fopen(name".inp", "r"))
    {
        freopen(name".inp", "r", stdin);
        freopen(name".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
    int tc = 1; 
    // cin >> tc;
    while (tc--)
        solve();
}

컴파일 시 표준 에러 (stderr) 메시지

Village.cpp: In function 'int main()':
Village.cpp:92:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |         freopen("in.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Village.cpp:93:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |         freopen("out.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Village.cpp:97:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   97 |         freopen(name".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Village.cpp:98:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   98 |         freopen(name".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 0 / 38
• Subtask 3: 0 / 50