Submission #793090

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
793090	2023-07-25T13:47:52 Z	denniskim	Cat Exercise (JOI23_ho_t4)	C++17	100 / 100	279 ms	69872 KB

Main

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef __int128 lll;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ld, ld> pld;
#define MAX 9223372036854775807LL
#define MIN -9223372036854775807LL
#define INF 0x3f3f3f3f3f3f3f3f
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); cout << fixed; cout.precision(10);
#define sp << " "
#define en << "\n"
#define compress(v) sort(v.begin(), v.end()), v.erase(unique(v.begin(), v.end()), v.end())

ll n;
ll a[200010];
pll b[200010];
ll all, bll;
vector<ll> vec[200010];
ll dep[200010];
ll spa[200010][21];
ll p[200010], ra[200010], maxx[200010];
ll dp[200010];

void dfs(ll here, ll pa)
{
	dep[here] = dep[pa] + 1;
	spa[here][0] = pa;
	
	for(auto &i : vec[here])
	{
		if(i == pa)
			continue;
		
		dfs(i, here);
	}
}

ll LCA(ll X, ll Y)
{
	if(dep[X] < dep[Y])
		swap(X, Y);
	
	ll cha = dep[X] - dep[Y];
	
	for(ll i = 20 ; i >= 0 ; i--)
	{
		if((1LL << i) <= cha)
		{
			cha -= (1LL << i);
			X = spa[X][i];
		}
	}
	
	if(X == Y)
		return X;
	
	for(ll i = 20 ; i >= 0 ; i--)
	{
		if(spa[X][i] != spa[Y][i])
		{
			X = spa[X][i];
			Y = spa[Y][i];
		}
	}
	
	return spa[X][0];
}

ll dist(ll X, ll Y)
{
	return dep[X] + dep[Y] - dep[LCA(X, Y)] * 2;
}

ll ffind(ll here)
{
	if(p[here] == here)
		return p[here];
	
	return p[here] = ffind(p[here]);
}

void uunion(ll X, ll Y)
{
	X = ffind(X);
	Y = ffind(Y);
	
	if(ra[X] > ra[Y])
		swap(X, Y);
	
	if(ra[X] == ra[Y])
		ra[Y]++;
	
	p[X] = Y;
	
	if(a[maxx[Y]] < a[maxx[X]])
		maxx[Y] = maxx[X];
}

int main(void)
{
	fastio
	
	cin >> n;
	
	for(ll i = 1 ; i <= n ; i++)
	{
		cin >> a[i];
		b[i] = {a[i], i};
	}
	
	sort(b + 1, b + 1 + n);
	
	for(ll i = 1 ; i < n ; i++)
	{
		cin >> all >> bll;
		
		vec[all].push_back(bll);
		vec[bll].push_back(all);
	}
	
	dfs(1, 0);
	
	for(ll i = 1 ; i <= 20 ; i++)
	{
		for(ll j = 1 ; j <= n ; j++)
			spa[j][i] = spa[spa[j][i - 1]][i - 1];
	}
	
	for(ll i = 1 ; i <= n ; i++)
		p[i] = i, ra[i] = 0, maxx[i] = i;
	
	for(ll i = 1 ; i <= n ; i++)
	{
		ll num = b[i].se;
		
		for(auto &j : vec[num])
		{
			if(a[j] < a[num])
			{
				dp[num] = max(dp[num], dp[maxx[ffind(j)]] + dist(maxx[ffind(j)], num));
				uunion(j, num);
			}
		}
	}
	
	cout << dp[b[n].se];
	return 0;
}

Subtask #1
7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	5076 KB	Output is correct
2	Correct	2 ms	5076 KB	Output is correct
3	Correct	3 ms	5076 KB	Output is correct
4	Correct	3 ms	5076 KB	Output is correct
5	Correct	2 ms	5076 KB	Output is correct
6	Correct	2 ms	5076 KB	Output is correct
7	Correct	2 ms	5076 KB	Output is correct
8	Correct	2 ms	5076 KB	Output is correct
9	Correct	2 ms	5036 KB	Output is correct
10	Correct	3 ms	5076 KB	Output is correct

Subtask #2
7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	5076 KB	Output is correct
2	Correct	2 ms	5076 KB	Output is correct
3	Correct	3 ms	5076 KB	Output is correct
4	Correct	3 ms	5076 KB	Output is correct
5	Correct	2 ms	5076 KB	Output is correct
6	Correct	2 ms	5076 KB	Output is correct
7	Correct	2 ms	5076 KB	Output is correct
8	Correct	2 ms	5076 KB	Output is correct
9	Correct	2 ms	5036 KB	Output is correct
10	Correct	3 ms	5076 KB	Output is correct
11	Correct	3 ms	5076 KB	Output is correct
12	Correct	3 ms	5076 KB	Output is correct
13	Correct	3 ms	5076 KB	Output is correct
14	Correct	3 ms	5076 KB	Output is correct
15	Correct	2 ms	5076 KB	Output is correct
16	Correct	3 ms	5076 KB	Output is correct
17	Correct	2 ms	5076 KB	Output is correct

Subtask #3
7.0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	5076 KB	Output is correct
2	Correct	2 ms	5076 KB	Output is correct
3	Correct	3 ms	5076 KB	Output is correct
4	Correct	3 ms	5076 KB	Output is correct
5	Correct	2 ms	5076 KB	Output is correct
6	Correct	2 ms	5076 KB	Output is correct
7	Correct	2 ms	5076 KB	Output is correct
8	Correct	2 ms	5076 KB	Output is correct
9	Correct	2 ms	5036 KB	Output is correct
10	Correct	3 ms	5076 KB	Output is correct
11	Correct	3 ms	5076 KB	Output is correct
12	Correct	3 ms	5076 KB	Output is correct
13	Correct	3 ms	5076 KB	Output is correct
14	Correct	3 ms	5076 KB	Output is correct
15	Correct	2 ms	5076 KB	Output is correct
16	Correct	3 ms	5076 KB	Output is correct
17	Correct	2 ms	5076 KB	Output is correct
18	Correct	5 ms	6612 KB	Output is correct
19	Correct	6 ms	6612 KB	Output is correct
20	Correct	5 ms	6612 KB	Output is correct
21	Correct	5 ms	6612 KB	Output is correct
22	Correct	5 ms	6612 KB	Output is correct
23	Correct	5 ms	6612 KB	Output is correct
24	Correct	5 ms	6556 KB	Output is correct

Subtask #4
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	5076 KB	Output is correct
2	Correct	2 ms	5076 KB	Output is correct
3	Correct	3 ms	5076 KB	Output is correct
4	Correct	3 ms	5076 KB	Output is correct
5	Correct	2 ms	5076 KB	Output is correct
6	Correct	2 ms	5076 KB	Output is correct
7	Correct	2 ms	5076 KB	Output is correct
8	Correct	2 ms	5076 KB	Output is correct
9	Correct	2 ms	5036 KB	Output is correct
10	Correct	3 ms	5076 KB	Output is correct
11	Correct	3 ms	5076 KB	Output is correct
12	Correct	3 ms	5076 KB	Output is correct
13	Correct	3 ms	5076 KB	Output is correct
14	Correct	3 ms	5076 KB	Output is correct
15	Correct	2 ms	5076 KB	Output is correct
16	Correct	3 ms	5076 KB	Output is correct
17	Correct	2 ms	5076 KB	Output is correct
18	Correct	5 ms	6612 KB	Output is correct
19	Correct	6 ms	6612 KB	Output is correct
20	Correct	5 ms	6612 KB	Output is correct
21	Correct	5 ms	6612 KB	Output is correct
22	Correct	5 ms	6612 KB	Output is correct
23	Correct	5 ms	6612 KB	Output is correct
24	Correct	5 ms	6556 KB	Output is correct
25	Correct	2 ms	5076 KB	Output is correct
26	Correct	5 ms	6516 KB	Output is correct
27	Correct	6 ms	6588 KB	Output is correct
28	Correct	5 ms	6456 KB	Output is correct
29	Correct	5 ms	6612 KB	Output is correct
30	Correct	6 ms	6356 KB	Output is correct
31	Correct	6 ms	6456 KB	Output is correct
32	Correct	5 ms	6356 KB	Output is correct
33	Correct	5 ms	6356 KB	Output is correct

Subtask #5
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	5076 KB	Output is correct
2	Correct	2 ms	5076 KB	Output is correct
3	Correct	3 ms	5076 KB	Output is correct
4	Correct	3 ms	5076 KB	Output is correct
5	Correct	2 ms	5076 KB	Output is correct
6	Correct	2 ms	5076 KB	Output is correct
7	Correct	2 ms	5076 KB	Output is correct
8	Correct	2 ms	5076 KB	Output is correct
9	Correct	2 ms	5036 KB	Output is correct
10	Correct	3 ms	5076 KB	Output is correct
11	Correct	3 ms	5076 KB	Output is correct
12	Correct	3 ms	5076 KB	Output is correct
13	Correct	3 ms	5076 KB	Output is correct
14	Correct	3 ms	5076 KB	Output is correct
15	Correct	2 ms	5076 KB	Output is correct
16	Correct	3 ms	5076 KB	Output is correct
17	Correct	2 ms	5076 KB	Output is correct
18	Correct	5 ms	6612 KB	Output is correct
19	Correct	6 ms	6612 KB	Output is correct
20	Correct	5 ms	6612 KB	Output is correct
21	Correct	5 ms	6612 KB	Output is correct
22	Correct	5 ms	6612 KB	Output is correct
23	Correct	5 ms	6612 KB	Output is correct
24	Correct	5 ms	6556 KB	Output is correct
25	Correct	167 ms	69832 KB	Output is correct
26	Correct	137 ms	69804 KB	Output is correct
27	Correct	133 ms	69780 KB	Output is correct
28	Correct	183 ms	69844 KB	Output is correct
29	Correct	207 ms	69724 KB	Output is correct
30	Correct	206 ms	69808 KB	Output is correct
31	Correct	185 ms	69872 KB	Output is correct

Subtask #6
23.0 / 23.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	5032 KB	Output is correct
2	Correct	3 ms	5076 KB	Output is correct
3	Correct	214 ms	61868 KB	Output is correct
4	Correct	208 ms	61780 KB	Output is correct
5	Correct	212 ms	61800 KB	Output is correct

Subtask #7
26.0 / 26.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	5076 KB	Output is correct
2	Correct	2 ms	5076 KB	Output is correct
3	Correct	3 ms	5076 KB	Output is correct
4	Correct	3 ms	5076 KB	Output is correct
5	Correct	2 ms	5076 KB	Output is correct
6	Correct	2 ms	5076 KB	Output is correct
7	Correct	2 ms	5076 KB	Output is correct
8	Correct	2 ms	5076 KB	Output is correct
9	Correct	2 ms	5036 KB	Output is correct
10	Correct	3 ms	5076 KB	Output is correct
11	Correct	3 ms	5076 KB	Output is correct
12	Correct	3 ms	5076 KB	Output is correct
13	Correct	3 ms	5076 KB	Output is correct
14	Correct	3 ms	5076 KB	Output is correct
15	Correct	2 ms	5076 KB	Output is correct
16	Correct	3 ms	5076 KB	Output is correct
17	Correct	2 ms	5076 KB	Output is correct
18	Correct	5 ms	6612 KB	Output is correct
19	Correct	6 ms	6612 KB	Output is correct
20	Correct	5 ms	6612 KB	Output is correct
21	Correct	5 ms	6612 KB	Output is correct
22	Correct	5 ms	6612 KB	Output is correct
23	Correct	5 ms	6612 KB	Output is correct
24	Correct	5 ms	6556 KB	Output is correct
25	Correct	2 ms	5076 KB	Output is correct
26	Correct	5 ms	6516 KB	Output is correct
27	Correct	6 ms	6588 KB	Output is correct
28	Correct	5 ms	6456 KB	Output is correct
29	Correct	5 ms	6612 KB	Output is correct
30	Correct	6 ms	6356 KB	Output is correct
31	Correct	6 ms	6456 KB	Output is correct
32	Correct	5 ms	6356 KB	Output is correct
33	Correct	5 ms	6356 KB	Output is correct
34	Correct	167 ms	69832 KB	Output is correct
35	Correct	137 ms	69804 KB	Output is correct
36	Correct	133 ms	69780 KB	Output is correct
37	Correct	183 ms	69844 KB	Output is correct
38	Correct	207 ms	69724 KB	Output is correct
39	Correct	206 ms	69808 KB	Output is correct
40	Correct	185 ms	69872 KB	Output is correct
41	Correct	3 ms	5032 KB	Output is correct
42	Correct	3 ms	5076 KB	Output is correct
43	Correct	214 ms	61868 KB	Output is correct
44	Correct	208 ms	61780 KB	Output is correct
45	Correct	212 ms	61800 KB	Output is correct
46	Correct	270 ms	66100 KB	Output is correct
47	Correct	279 ms	65196 KB	Output is correct
48	Correct	249 ms	66564 KB	Output is correct
49	Correct	257 ms	65212 KB	Output is correct
50	Correct	263 ms	61488 KB	Output is correct
51	Correct	273 ms	61480 KB	Output is correct
52	Correct	274 ms	61460 KB	Output is correct
53	Correct	248 ms	61484 KB	Output is correct

Submission #793090

Compilation message

Subtask #1 7.0 / 7.0

Subtask #2 7.0 / 7.0

Subtask #3 7.0 / 7.0

Subtask #4 10.0 / 10.0

Subtask #5 20.0 / 20.0

Subtask #6 23.0 / 23.0

Subtask #7 26.0 / 26.0

Subtask #1
7.0 / 7.0

Subtask #2
7.0 / 7.0

Subtask #3
7.0 / 7.0

Subtask #4
10.0 / 10.0

Subtask #5
20.0 / 20.0

Subtask #6
23.0 / 23.0

Subtask #7
26.0 / 26.0