oj.uz

Submission #69501

# Submission time Handle Problem Language Result Execution time Memory
69501 2018-08-21T05:38:08 Z qkxwsm Cats or Dogs (JOI18_catdog) C++17
38 / 100
 3000 ms 9040 KB 
#include "catdog.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

struct chash
{
	int operator()(int x) const
	{
		x ^= (x >> 20) ^ (x >> 12);
		return x ^ (x >> 7) ^ (x >> 4);
	}
	int operator()(long long x) const
	{
		return x ^ (x >> 32);
	}
};

template<typename T> using orderedset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T, typename U> using hashtable = gp_hash_table<T, U, chash>;

template<class T>
void ckmin(T &a, T b)
{
	a = min(a, b);
}
template<class T>
void ckmax(T &a, T b)
{
	a = max(a, b);
}
template<class T, class U>
T normalize(T x, U mod = 1000000007)
{
	return (((x % mod) + mod) % mod);
}
static long long randomizell(long long mod)
{
	return ((1ll << 45) * rand() + (1ll << 30) * rand() + (1ll << 15) * rand() + rand()) % mod;
}
static int randomize(int mod)
{
	return ((1ll << 15) * rand() + rand()) % mod;
}

#define y0 ___y0
#define y1 ___y1
#define MP make_pair
#define MT make_tuple
#define PB push_back
#define PF push_front
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second
#define debug(x) cerr << #x << " = " << x << endl;

const long double PI = 4.0 * atan(1.0);
const long double EPS = 1e-10;

#define MAGIC 347
#define SINF 10007
#define CO 1000007
#define INF 1000000007
#define BIG 1000000931
#define LARGE 1696969696967ll
#define GIANT 2564008813937411ll
#define LLINF 2696969696969696969ll
#define MAXN 100013

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<ld, ld> pdd;

int N;
vector<int> edge[MAXN];
int parent[MAXN], depth[MAXN];
int heavy[MAXN], head[MAXN], ranking[MAXN], subtree[MAXN], siz[MAXN];
int arr[MAXN];
int dp[2][MAXN];

void dfs(int u)
{
	subtree[u] = 1;
	for (int v : edge[u])
	{
		if (v == parent[u]) continue;
		parent[v] = u;
		depth[v] = depth[u] + 1;
		dfs(v);
		subtree[u] += subtree[v];
	}
	heavy[u] = N;
	for (int v : edge[u])
	{
		if (v == parent[u]) continue;
		if (subtree[v] * 2 >= subtree[u]) heavy[u] = v;
	}
}
void dfs_heavy(int u)
{
	if (heavy[u] != N)
	{
		head[heavy[u]] = head[u];
		ranking[heavy[u]] = ranking[u] + 1;
		dfs_heavy(heavy[u]);
	}
	for (int v : edge[u])
	{
		if (v == parent[u]) continue;
		if (v == heavy[u]) continue;
		ranking[v] = 0;
		head[v] = v;
		dfs_heavy(v);
	}
	return;
}
void initialize(int n, vector<int> a, vector<int> b)
{
	N = n;
	for (int i = 0; i < N - 1; i++)
	{
		int u = a[i], v = b[i];
		u--; v--;
		edge[u].PB(v);
		edge[v].PB(u);
	}
	parent[N] = N; parent[0] = N;
	dfs(0);
	dfs_heavy(0);
	for (int i = 0; i < N; i++)
	{
		arr[i] = -1;
	}
}
void solve(int u)
{
	for (int v : edge[u])
	{
		if (v == parent[u]) continue;
		solve(v);
	}
	//this guy is a 0
	dp[0][u] = 0;
	dp[1][u] = 0;
	for (int v : edge[u])
	{
		if (v == parent[u]) continue;
		dp[0][u] += min(dp[0][v], dp[1][v] + 1);
		dp[1][u] += min(dp[1][v], dp[0][v] + 1);
	}
	if (arr[u] == 0) dp[1][u] = INF;
	if (arr[u] == 1) dp[0][u] = INF;
	return;
}
int setval(int u, int v)
{
	// for (int i = 0; i < N; i++)
	// {
	// 	cerr << arr[u] << endl;
	// }
	// cerr << "set " << u << " to " << v << endl;
	arr[u] = v;
	solve(0);
	return min(dp[0][0], dp[1][0]);
}
int cat(int u)
{
	u--;
	return setval(u, 0);
}
int dog(int u)
{
	u--;
	return setval(u, 1);
}
int neighbor(int u)
{
	u--;
	return setval(u, -1);
}

Compilation message

catdog.cpp:44:12: warning: 'int randomize(int)' defined but not used [-Wunused-function]
 static int randomize(int mod)
            ^~~~~~~~~
catdog.cpp:40:18: warning: 'long long int randomizell(long long int)' defined but not used [-Wunused-function]
 static long long randomizell(long long mod)
                  ^~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 2680 KB Output is correct
2 Correct 5 ms 2680 KB Output is correct
3 Correct 5 ms 2856 KB Output is correct
4 Correct 5 ms 2856 KB Output is correct
5 Correct 6 ms 2876 KB Output is correct
6 Correct 6 ms 2880 KB Output is correct
7 Correct 5 ms 2884 KB Output is correct
8 Correct 5 ms 2892 KB Output is correct
9 Correct 6 ms 2896 KB Output is correct
10 Correct 4 ms 3028 KB Output is correct
11 Correct 4 ms 3028 KB Output is correct
12 Correct 5 ms 3028 KB Output is correct
13 Correct 6 ms 3028 KB Output is correct
14 Correct 6 ms 3028 KB Output is correct
15 Correct 5 ms 3028 KB Output is correct
16 Correct 4 ms 3028 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 2680 KB Output is correct
2 Correct 5 ms 2680 KB Output is correct
3 Correct 5 ms 2856 KB Output is correct
4 Correct 5 ms 2856 KB Output is correct
5 Correct 6 ms 2876 KB Output is correct
6 Correct 6 ms 2880 KB Output is correct
7 Correct 5 ms 2884 KB Output is correct
8 Correct 5 ms 2892 KB Output is correct
9 Correct 6 ms 2896 KB Output is correct
10 Correct 4 ms 3028 KB Output is correct
11 Correct 4 ms 3028 KB Output is correct
12 Correct 5 ms 3028 KB Output is correct
13 Correct 6 ms 3028 KB Output is correct
14 Correct 6 ms 3028 KB Output is correct
15 Correct 5 ms 3028 KB Output is correct
16 Correct 4 ms 3028 KB Output is correct
17 Correct 17 ms 3112 KB Output is correct
18 Correct 21 ms 3168 KB Output is correct
19 Correct 11 ms 3196 KB Output is correct
20 Correct 5 ms 3196 KB Output is correct
21 Correct 8 ms 3196 KB Output is correct
22 Correct 9 ms 3196 KB Output is correct
23 Correct 26 ms 3272 KB Output is correct
24 Correct 17 ms 3288 KB Output is correct
25 Correct 11 ms 3288 KB Output is correct
26 Correct 7 ms 3332 KB Output is correct
27 Correct 7 ms 3332 KB Output is correct
28 Correct 9 ms 3364 KB Output is correct
29 Correct 24 ms 3436 KB Output is correct
30 Correct 7 ms 3436 KB Output is correct
31 Correct 6 ms 3436 KB Output is correct
32 Correct 9 ms 3436 KB Output is correct

Subtask #3
0 / 62.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 2680 KB Output is correct
2 Correct 5 ms 2680 KB Output is correct
3 Correct 5 ms 2856 KB Output is correct
4 Correct 5 ms 2856 KB Output is correct
5 Correct 6 ms 2876 KB Output is correct
6 Correct 6 ms 2880 KB Output is correct
7 Correct 5 ms 2884 KB Output is correct
8 Correct 5 ms 2892 KB Output is correct
9 Correct 6 ms 2896 KB Output is correct
10 Correct 4 ms 3028 KB Output is correct
11 Correct 4 ms 3028 KB Output is correct
12 Correct 5 ms 3028 KB Output is correct
13 Correct 6 ms 3028 KB Output is correct
14 Correct 6 ms 3028 KB Output is correct
15 Correct 5 ms 3028 KB Output is correct
16 Correct 4 ms 3028 KB Output is correct
17 Correct 17 ms 3112 KB Output is correct
18 Correct 21 ms 3168 KB Output is correct
19 Correct 11 ms 3196 KB Output is correct
20 Correct 5 ms 3196 KB Output is correct
21 Correct 8 ms 3196 KB Output is correct
22 Correct 9 ms 3196 KB Output is correct
23 Correct 26 ms 3272 KB Output is correct
24 Correct 17 ms 3288 KB Output is correct
25 Correct 11 ms 3288 KB Output is correct
26 Correct 7 ms 3332 KB Output is correct
27 Correct 7 ms 3332 KB Output is correct
28 Correct 9 ms 3364 KB Output is correct
29 Correct 24 ms 3436 KB Output is correct
30 Correct 7 ms 3436 KB Output is correct
31 Correct 6 ms 3436 KB Output is correct
32 Correct 9 ms 3436 KB Output is correct
33 Execution timed out 3061 ms 9040 KB Time limit exceeded
34 Halted 0 ms 0 KB -