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답안 #705377

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
705377 2023-03-04T07:51:14 Z Chal1shkan Logičari (COCI21_logicari) C++14
110 / 110
 220 ms 32760 KB 
# include <bits/stdc++.h>
 
# define pb push_back
# define ff first
# define ss second
# define nl "\n"
# define sz(x) ((int)(x).size())
# define deb(x) cerr << #x  << " = " << x << endl; 
# define pll pair <ll, ll>
 
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
 
const ll maxn = 1e5 + 25;
const ll inf = 2e9 + 0;
const ll mod = 1e9 + 123;
const ll dx[] = {-1, 1, 0, 0};
const ll dy[] = {0, 0, -1, 1};
 
using namespace std;

ll n, par[maxn];
vector <ll> g[maxn];
ll root, spec;
ll dp[maxn][2][2][2][2];

ll find_set (ll v)
{
	if (v == par[v]) return v;
	return par[v] = find_set(par[v]);
}

void build (ll v, ll pa)
{
	par[v] = pa;
	for (ll to : g[v])
	{
		if (to == pa) continue;
		build(to, v);
	}
}

ll solve (ll v, bool col_me, bool col_par, bool col_root, bool col_spec)
{
	if (dp[v][col_me][col_par][col_root][col_spec] != -1) return dp[v][col_me][col_par][col_root][col_spec];
	if (v == root && col_me != col_root)  return dp[v][col_me][col_par][col_root][col_spec] = inf;
	if (v == spec && col_me != col_spec)  return dp[v][col_me][col_par][col_root][col_spec] = inf;
	if (v == spec && col_root && col_par) return dp[v][col_me][col_par][col_root][col_spec] = inf;
	bool boo = 0;
	if (col_par) boo = 1;
	if (v == root && col_spec) boo = 1;
	if (v == spec && col_root) boo = 1;
	ll sum = (ll)col_me;
	for (ll to : g[v])
	{
		if (to == par[v]) continue;
		sum += solve(to, 0, col_me, col_root, col_spec);
	}
	ll val = inf;
	if (boo)
	{
		val = sum;
	}
	else
	{
		for (ll to : g[v])
		{
			if (to == par[v]) continue;
			ll cur = sum - solve(to, 0, col_me, col_root, col_spec) + solve(to, 1, col_me, col_root, col_spec);
			val = min(val, cur);
		}
	}
	return dp[v][col_me][col_par][col_root][col_spec] = val;
}

void ma1n (/* SABR */)
{
	cin >> n;
	for (ll i = 1; i <= n; ++i)
	{
		par[i] = i;
	}
	memset(dp, -1, sizeof(dp));
	for (ll i = 1, u, v; i <= n; ++i)
	{
		cin >> u >> v;
		ll cmp1 = find_set(u);
		ll cmp2 = find_set(v);
		if (cmp1 == cmp2)
		{
			root = u;
			spec = v;
		}
		else
		{
			par[cmp2] = cmp1;
			g[u].pb(v);
			g[v].pb(u);
		}
	}
	build(root, root);
	ll ans = inf;
	ans = min(ans, solve(root, 0, 0, 0, 0));
	ans = min(ans, solve(root, 1, 0, 1, 0));
	ans = min(ans, solve(root, 0, 0, 0, 1));
	ans = min(ans, solve(root, 1, 0, 1, 1));
	if (ans == inf) ans = -1;
	cout << ans << nl;
}
 
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
//  freopen("spainting.in", "r", stdin);
//  freopen("spainting.out", "w", stdout);
    int ttt = 1;
//  cin >> ttt;
    for (int test = 1; test <= ttt; ++test)
    {
//      cout << "Case " << test << ":" << ' ';
        ma1n();
    }
    return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 15188 KB Output is correct
2 Correct 7 ms 15140 KB Output is correct
3 Correct 7 ms 15204 KB Output is correct
4 Correct 9 ms 15092 KB Output is correct
5 Correct 209 ms 31984 KB Output is correct
6 Correct 201 ms 31968 KB Output is correct
7 Correct 202 ms 32016 KB Output is correct
8 Correct 220 ms 31984 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 15188 KB Output is correct
2 Correct 7 ms 15188 KB Output is correct
3 Correct 7 ms 15188 KB Output is correct
4 Correct 7 ms 15188 KB Output is correct
5 Correct 6 ms 15188 KB Output is correct
6 Correct 6 ms 15188 KB Output is correct
7 Correct 8 ms 15188 KB Output is correct
8 Correct 7 ms 15188 KB Output is correct
9 Correct 7 ms 15120 KB Output is correct
10 Correct 6 ms 15188 KB Output is correct
11 Correct 7 ms 15188 KB Output is correct
12 Correct 8 ms 15088 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 15188 KB Output is correct
2 Correct 7 ms 15188 KB Output is correct
3 Correct 7 ms 15188 KB Output is correct
4 Correct 7 ms 15188 KB Output is correct
5 Correct 6 ms 15188 KB Output is correct
6 Correct 6 ms 15188 KB Output is correct
7 Correct 8 ms 15188 KB Output is correct
8 Correct 7 ms 15188 KB Output is correct
9 Correct 7 ms 15120 KB Output is correct
10 Correct 6 ms 15188 KB Output is correct
11 Correct 7 ms 15188 KB Output is correct
12 Correct 8 ms 15088 KB Output is correct
13 Correct 7 ms 15228 KB Output is correct
14 Correct 7 ms 15216 KB Output is correct
15 Correct 7 ms 15188 KB Output is correct
16 Correct 7 ms 15208 KB Output is correct
17 Correct 7 ms 15188 KB Output is correct
18 Correct 7 ms 15188 KB Output is correct
19 Correct 6 ms 15188 KB Output is correct
20 Correct 7 ms 15188 KB Output is correct
21 Correct 7 ms 15188 KB Output is correct
22 Correct 10 ms 15232 KB Output is correct
23 Correct 7 ms 15444 KB Output is correct
24 Correct 8 ms 15228 KB Output is correct

Subtask #4
50.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 15188 KB Output is correct
2 Correct 7 ms 15140 KB Output is correct
3 Correct 7 ms 15204 KB Output is correct
4 Correct 9 ms 15092 KB Output is correct
5 Correct 209 ms 31984 KB Output is correct
6 Correct 201 ms 31968 KB Output is correct
7 Correct 202 ms 32016 KB Output is correct
8 Correct 220 ms 31984 KB Output is correct
9 Correct 7 ms 15188 KB Output is correct
10 Correct 7 ms 15188 KB Output is correct
11 Correct 7 ms 15188 KB Output is correct
12 Correct 7 ms 15188 KB Output is correct
13 Correct 6 ms 15188 KB Output is correct
14 Correct 6 ms 15188 KB Output is correct
15 Correct 8 ms 15188 KB Output is correct
16 Correct 7 ms 15188 KB Output is correct
17 Correct 7 ms 15120 KB Output is correct
18 Correct 6 ms 15188 KB Output is correct
19 Correct 7 ms 15188 KB Output is correct
20 Correct 8 ms 15088 KB Output is correct
21 Correct 7 ms 15228 KB Output is correct
22 Correct 7 ms 15216 KB Output is correct
23 Correct 7 ms 15188 KB Output is correct
24 Correct 7 ms 15208 KB Output is correct
25 Correct 7 ms 15188 KB Output is correct
26 Correct 7 ms 15188 KB Output is correct
27 Correct 6 ms 15188 KB Output is correct
28 Correct 7 ms 15188 KB Output is correct
29 Correct 7 ms 15188 KB Output is correct
30 Correct 10 ms 15232 KB Output is correct
31 Correct 7 ms 15444 KB Output is correct
32 Correct 8 ms 15228 KB Output is correct
33 Correct 142 ms 20076 KB Output is correct
34 Correct 121 ms 20144 KB Output is correct
35 Correct 133 ms 20148 KB Output is correct
36 Correct 127 ms 20152 KB Output is correct
37 Correct 28 ms 16340 KB Output is correct
38 Correct 121 ms 20156 KB Output is correct
39 Correct 14 ms 15624 KB Output is correct
40 Correct 118 ms 20052 KB Output is correct
41 Correct 69 ms 21128 KB Output is correct
42 Correct 125 ms 20956 KB Output is correct
43 Correct 158 ms 32760 KB Output is correct
44 Correct 127 ms 26820 KB Output is correct