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답안 #637411

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
637411 2022-09-01T16:17:49 Z IWTIM Uzastopni (COCI15_uzastopni) C++17
160 / 160
 175 ms 18588 KB 
#include <bits/stdc++.h>
	using namespace std;
using ll = long long;
using db = long double;	// or double, if TL is tight
using str = string;	// yay python! 

// pairs
using pii = pair<int, int> ;
using pl = pair<ll, ll> ;
using pd = pair<db, db> ;

#define mp make_pair
#define f first
#define s second
#define tcT template < class T
#define tcTU tcT, class U
// ^ lol this makes everything look weird but I'll try it
tcT > using V = vector<T> ;
tcT, size_t SZ > using AR = array<T, SZ> ;
using vi = V<int> ;
using vb = V<bool> ;
using vl = V<ll> ;
using vd = V<db> ;
using vs = V<str> ;
using vpi = V<pii> ;
using vpl = V<pl> ;
using vpd = V<pd> ;

// vectors
// oops size(x), rbegin(x), rend(x) need C++17
#define sz(x) int((x).size())
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define rall(x) x.rbegin(), x.rend()
#define sor(x) sort(all(x))
#define rsz resize
#define ins insert
#define pb push_back
#define eb emplace_back
#define ft front()
#define bk back()
#define lb lower_bound
#define ub upper_bound
#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define F0R(i, a) FOR(i, 0, a)
#define ROF(i, a, b) for (int i = (b) - 1; i >= (a); --i)
#define R0F(i, a) ROF(i, 0, a)
#define rep(a) F0R(_, a)
#define each(a, x) for (auto &a: x)
	const int MOD = 998244353;
const int MX = 2e5 + 5;
const ll BIG = 1e18;	// not too close to LLONG_MAX
const db PI = acos((db) - 1);
const int dx[4]
{
	1, 0, -1, 0
}, dy[4]
{
	0, 1, 0, -1
};	// for every grid problem!!
mt19937 rng((uint32_t) chrono::steady_clock::now().time_since_epoch().count());
template < class T > using pqg = priority_queue<T, vector < T>, greater < T>> ;
struct DSU
{
	vi e;
	void init(int N)
	{
		e = vi(N, -1);
	}

	int get(int x)
	{
		return e[x] < 0 ? x : e[x] = get(e[x]);
	}

	bool sameSet(int a, int b)
	{
		return get(a) == get(b);
	}

	int size(int x)
	{
		return -e[get(x)];
	}

	bool unite(int x, int y)
	{
		// union by size
		x = get(x), y = get(y);
		if (x == y) return 0;
		if (e[x] > e[y]) swap(x, y);
		e[x] += e[y];
		e[y] = x;
		return 1;
	}
};
/*
inline namespace Helpers {
	//////////// is_iterable
	// https://stackoverflow.com/questions/13830158/check-if-a-variable-type-is-iterable
	// this gets used only when we can call begin() and end() on that type
	tcT, class = void > struct is_iterable : false_type {};
	tcT > struct is_iterable<T, void_t<decltype(begin(declval < T>())),
	                                  decltype(end(declval < T>()))
	                                 >
	                       > : true_type {};
	tcT > constexpr bool is_iterable_v = is_iterable<T>::value;

	//////////// is_readable
	tcT, class = void > struct is_readable : false_type {};
	tcT > struct is_readable<T,
	        typename std::enable_if_t<
	            is_same_v < decltype(cin >> declval<T&>()), istream&>
	        >
	    > : true_type {};
	tcT > constexpr bool is_readable_v = is_readable<T>::value;

	//////////// is_printable
	//	// https://nafe.es/posts/2020-02-29-is-printable/
	tcT, class = void > struct is_printable : false_type {};
	tcT > struct is_printable<T,
	        typename std::enable_if_t<
	            is_same_v < decltype(cout <<declval < T>()), ostream&>
	        >
	    > : true_type {};
	tcT > constexpr bool is_printable_v = is_printable<T>::value;
}*/
using ll = long long;
using db = long double;	// or double, if TL is tight
using str = string;	// yay python! 

// pairs
using pii = pair<int, int> ;
using pl = pair<ll, ll> ;
using pd = pair<db, db> ;

#define mp make_pair
#define f first
#define s second
#define tcT template < class T
#define tcTU tcT, class U
// ^ lol this makes everything look weird but I'll try it
tcT > using V = vector<T> ;
tcT, size_t SZ > using AR = array<T, SZ> ;
using vi = V<int> ;
using vb = V<bool> ;
using vl = V<ll> ;
using vd = V<db> ;
using vs = V<str> ;
using vpi = V<pii> ;
using vpl = V<pl> ;
using vpd = V<pd> ;

// vectors
// oops size(x), rbegin(x), rend(x) need C++17
#define sz(x) int((x).size())
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define rall(x) x.rbegin(), x.rend()
#define sor(x) sort(all(x))
#define rsz resize
#define ins insert
#define pb push_back
#define eb emplace_back
#define ft front()
#define bk back()
#define lb lower_bound
#define ub upper_bound
#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define F0R(i, a) FOR(i, 0, a)
#define ROF(i, a, b) for (int i = (b) - 1; i >= (a); --i)
#define R0F(i, a) ROF(i, 0, a)
#define rep(a) F0R(_, a)
#define each(a, x) for (auto &a: x)
	template < class T > using pqg = priority_queue<T, vector < T>, greater < T>> ;

/*
inline namespace Helpers {
	//////////// is_iterable
	// https://stackoverflow.com/questions/13830158/check-if-a-variable-type-is-iterable
	// this gets used only when we can call begin() and end() on that type
	tcT, class = void > struct is_iterable : false_type {};
	tcT > struct is_iterable<T, void_t<decltype(begin(declval < T>())),
	                                  decltype(end(declval < T>()))
	                                 >
	                       > : true_type {};
	tcT > constexpr bool is_iterable_v = is_iterable<T>::value;

	//////////// is_readable
	tcT, class = void > struct is_readable : false_type {};
	tcT > struct is_readable<T,
	        typename std::enable_if_t<
	            is_same_v < decltype(cin >> declval<T&>()), istream&>
	        >
	    > : true_type {};
	tcT > constexpr bool is_readable_v = is_readable<T>::value;

	//////////// is_printable
	//	// https://nafe.es/posts/2020-02-29-is-printable/
	tcT, class = void > struct is_printable : false_type {};
	tcT > struct is_printable<T,
	        typename std::enable_if_t<
	            is_same_v < decltype(cout <<declval < T>()), ostream&>
	        >
	    > : true_type {};
	tcT > constexpr bool is_printable_v = is_printable<T>::value;
}*/
const int N = 105;
int t, n, a[N *N], col[N *N];
bitset<105> dp[N *N][N];
vector<int> v[N *N];
void dfs(int a, int p)
{
	dp[a][col[a]][col[a]] = 1;
	for (int to: v[a])
	{
		if (to == p) continue;
		dfs(to, a);
		for (int i = 100; i >= 1; i--)
		{
			for (int j = i; j <= 100; j++)
			{
				if (dp[to][i][j] && i <= col[a] && j >= col[a]) dp[to][i][j] = 0;
				if (dp[a][i][j]) dp[a][i] |= dp[to][j + 1], dp[a][i] |= dp[a][j + 1];
				if (dp[to][i][j]) dp[a][i] |= dp[a][j + 1], dp[a][i][j] = 1;
			}
		}
	}

	for (int i = 1; i <= 100; i++)
	{
		for (int j = i; j <= 100; j++)
		{
			if (dp[a][i][j] && (col[a] < i || col[a] > j)) dp[a][i][j] = 0;
		}
	}
}

main()
{
	std::ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);
	cin >> n;
	for (int i = 1; i <= n; i++)
	{
		cin >> col[i];
	}

	for (int i = 1; i <= n - 1; i++)
	{
		int a, b;
		cin >> a >> b;
		v[a].pb(b);
		v[b].pb(a);
	}

	dfs(1, 0);
	int ans = 0;
	for (int i = 1; i <= 100; i++)
	{
		ans += dp[1][i].count();
	}

	cout << ans << "\n";
}

Compilation message

uzastopni.cpp:239:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  239 | main()
      | ^~~~

Subtask #1
160.0 / 160.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 2 ms 596 KB Output is correct
3 Correct 2 ms 724 KB Output is correct
4 Correct 2 ms 724 KB Output is correct
5 Correct 2 ms 728 KB Output is correct
6 Correct 2 ms 716 KB Output is correct
7 Correct 2 ms 724 KB Output is correct
8 Correct 2 ms 724 KB Output is correct
9 Correct 2 ms 724 KB Output is correct
10 Correct 2 ms 724 KB Output is correct
11 Correct 132 ms 17484 KB Output is correct
12 Correct 137 ms 17468 KB Output is correct
13 Correct 137 ms 17404 KB Output is correct
14 Correct 139 ms 18588 KB Output is correct
15 Correct 137 ms 18508 KB Output is correct
16 Correct 134 ms 18484 KB Output is correct
17 Correct 133 ms 17436 KB Output is correct
18 Correct 134 ms 17380 KB Output is correct
19 Correct 170 ms 17460 KB Output is correct
20 Correct 175 ms 17596 KB Output is correct