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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#71761#3275. 小明的树He_Ren100 ✓2231ms40272kbC++142.8kb2023-01-12 00:58:092023-01-12 00:58:20

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-01-12 00:58:20]
  • 评测
  • 测评结果:100
  • 用时:2231ms
  • 内存:40272kb
  • [2023-01-12 00:58:09]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
const int MAXN = 5e5 + 5;

struct Data
{
	int mn, cnt;
	ll sum;
	Data(void){}
	Data(int _mn,int _cnt,ll _sum): mn(_mn), cnt(_cnt), sum(_sum) {}
	inline void aply1(int k){ mn += k;}
	inline void aply2(ll k){ sum += k * cnt;}
};

Data operator + (const Data &p,const Data &q)
{
	if(p.mn < q.mn) return p;
	if(p.mn > q.mn) return q;
	return Data(p.mn, p.cnt + q.cnt, p.sum + q.sum);
}

struct Segment_Tree
{
	Data f[MAXN<<2];
	int tag1[MAXN<<2];
	ll tag2[MAXN<<2];
	#define ls(u) ((u)<<1)
	#define rs(u) ((u)<<1|1)
	#define lson(u) ls(u),l,mid
	#define rson(u) rs(u),mid+1,r
	inline void push_up(int u)
	{
		f[u] = f[ls(u)] + f[rs(u)];
	}
	inline void upd1(int u,int k){ tag1[u] += k; f[u].aply1(k);}
	inline void upd2(int u,ll k){ tag2[u] += k; f[u].aply2(k);}
	inline void push_down(int u)
	{
		if(tag1[u])
		{
			upd1(ls(u), tag1[u]); upd1(rs(u), tag1[u]);
			tag1[u] = 0;
		}
		if(tag2[u])
		{
			upd2(ls(u), tag2[u]); upd2(rs(u), tag2[u]);
			tag2[u] = 0;
		}
	}
	void build(int u,int l,int r)
	{
		tag1[u] = tag2[u] = 0;
		if(l == r){ f[u] = Data(0,1,0); return;}
		int mid = (l+r)>>1;
		build(lson(u)); build(rson(u));
		push_up(u);
	}
	void add1(int u,int l,int r,int ql,int qr,int k)
	{
		if(ql<=l && r<=qr){ upd1(u,k); return;}
		push_down(u);
		int mid = (l+r)>>1;
		if(ql<=mid) add1(lson(u),ql,qr,k);
		if(mid<qr) add1(rson(u),ql,qr,k);
		push_up(u);
	}
	void add2(int u,int l,int r,int ql,int qr,ll k)
	{
		if(ql<=l && r<=qr){ upd2(u,k); return;}
		push_down(u);
		int mid = (l+r)>>1;
		if(ql<=mid) add2(lson(u),ql,qr,k);
		if(mid<qr) add2(rson(u),ql,qr,k);
		push_up(u);
	}
	
	int n;
	inline void build(int _n){ n = _n; build(1,1,n);}
	inline void add1(int ql,int qr,int k){ if(ql<=qr) add1(1,1,n,ql,qr,k);}
	inline void add2(int ql,int qr,ll k){ if(ql<=qr) add2(1,1,n,ql,qr,k);}
}tree;

int p[MAXN], pos[MAXN];
pii es[MAXN];

int main(void)
{
	int n,Q;
	scanf("%d%d",&n,&Q);
	for(int i=1; i<n; ++i) scanf("%d%d",&es[i].first,&es[i].second);
	for(int i=1; i<n; ++i) scanf("%d",&p[i]);
	p[n] = 1;
	
	for(int i=1; i<=n; ++i)
		pos[p[i]] = i;
	tree.build(n-1);
	for(int i=1; i<n; ++i)
		tree.add1(i, i, n-i);
	
	auto upd = [&] (int u,int v,int k)
	{
		if(pos[u] > pos[v]) swap(u, v);
		tree.add1(1, pos[u]-1, -k);
		tree.add2(pos[u], pos[v]-1, k);
	};
	auto query = [&] (void) -> ll
	{
		Data res = tree.f[1];
		if(res.mn == 1) return res.sum;
		else return 0;
	};
	
	for(int i=1; i<n; ++i) upd(es[i].first, es[i].second, 1);
	printf("%lld\n",query());
	while(Q--)
	{
		int u,v,uu,vv;
		scanf("%d%d%d%d",&u,&v,&uu,&vv);
		upd(u,v,-1); upd(uu,vv,1);
		printf("%lld\n",query());
	}
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 10
Accepted

Test #1:

score: 10
Accepted
time: 706ms
memory: 40144kb

input:

500000 0
2 1
3 2
4 2
5 4
6 1
7 1
8 4
9 3
10 9
11 3
12 8
13 5
14 7
15 10
16 10
17 13
18 14
19 18
20 14
21 13
22 3
23 2
24 2
25 10
26 19
27 13
28 16
29 7
30 11
31 13
32 28
33 30
34 10
35 26
36 5
37 34
38 20
39 7
40 35
41 30
42 11
43 40
44 10
45 5
46 23
47 15
48 23
49 16
50 5
51 13
52 23
53 47
54 3
55 ...

output:

237

result:

ok 1 number(s): "237"

Subtask #2:

score: 20
Accepted

Test #2:

score: 20
Accepted
time: 13ms
memory: 8308kb

input:

8000 8000
2 1
3 2
4 1
5 4
6 3
7 4
8 3
9 3
10 8
11 6
12 7
13 11
14 11
15 7
16 4
17 11
18 7
19 8
20 19
21 18
22 17
23 2
24 15
25 23
26 13
27 10
28 1
29 7
30 17
31 11
32 18
33 2
34 1
35 29
36 5
37 21
38 6
39 7
40 26
41 19
42 3
43 9
44 39
45 23
46 41
47 38
48 12
49 4
50 30
51 1
52 41
53 17
54 41
55 53
5...

output:

16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
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11
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11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
...

result:

ok 8001 numbers

Test #3:

score: 0
Accepted
time: 18ms
memory: 8280kb

input:

8000 8000
2 1
3 2
4 3
5 1
6 1
7 2
8 6
9 7
10 5
11 8
12 1
13 3
14 9
15 7
16 11
17 15
18 17
19 16
20 8
21 9
22 16
23 8
24 17
25 23
26 11
27 22
28 16
29 11
30 14
31 27
32 23
33 24
34 7
35 26
36 10
37 35
38 7
39 21
40 7
41 11
42 32
43 11
44 17
45 9
46 4
47 5
48 24
49 25
50 15
51 32
52 41
53 28
54 34
55 ...

output:

12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
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12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
...

result:

ok 8001 numbers

Subtask #3:

score: 70
Accepted

Dependency #1:

100%
Accepted

Dependency #2:

100%
Accepted

Test #4:

score: 70
Accepted
time: 2231ms
memory: 40092kb

input:

500000 500000
2 1
3 2
4 1
5 2
6 1
7 6
8 7
9 1
10 7
11 8
12 11
13 6
14 4
15 4
16 6
17 9
18 8
19 14
20 11
21 15
22 9
23 11
24 16
25 6
26 19
27 15
28 7
29 10
30 18
31 5
32 30
33 27
34 15
35 22
36 23
37 13
38 21
39 12
40 12
41 38
42 8
43 42
44 37
45 43
46 17
47 14
48 41
49 20
50 20
51 44
52 39
53 23
54 ...

output:

262
262
262
262
262
262
262
262
262
262
262
262
262
262
262
262
262
262
262
262
262
262
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262
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262
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262
262
262
262
262
262
262
262
262
262
262
262
262
262
262
262
262
262
...

result:

ok 500001 numbers

Test #5:

score: 0
Accepted
time: 2060ms
memory: 40044kb

input:

500000 500000
2 1
3 1
4 2
5 3
6 2
7 3
8 1
9 3
10 2
11 8
12 6
13 8
14 7
15 12
16 8
17 11
18 10
19 12
20 12
21 7
22 6
23 16
24 1
25 21
26 13
27 8
28 19
29 3
30 26
31 27
32 21
33 21
34 23
35 16
36 28
37 31
38 3
39 17
40 9
41 8
42 37
43 15
44 40
45 8
46 44
47 31
48 46
49 27
50 17
51 9
52 13
53 29
54 6
5...

output:

415
415
415
415
415
415
415
415
415
415
415
415
415
415
415
415
415
415
415
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415
415
415
415
415
415
415
415
415
415
415
415
415
415
415
415
415
415
...

result:

ok 500001 numbers

Test #6:

score: 0
Accepted
time: 2080ms
memory: 40112kb

input:

500000 500000
2 1
3 2
4 1
5 4
6 3
7 1
8 5
9 6
10 7
11 5
12 5
13 12
14 2
15 6
16 15
17 9
18 17
19 17
20 5
21 9
22 19
23 5
24 15
25 11
26 4
27 11
28 19
29 28
30 5
31 30
32 21
33 10
34 8
35 3
36 14
37 10
38 26
39 12
40 1
41 27
42 34
43 20
44 14
45 33
46 3
47 19
48 45
49 35
50 32
51 1
52 42
53 9
54 7
55...

output:

57
57
57
57
57
57
57
57
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57
57
57
57
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57
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57
57
57
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57
57
57
57
57
57
57
...

result:

ok 500001 numbers

Test #7:

score: 0
Accepted
time: 2050ms
memory: 40172kb

input:

500000 500000
2 1
3 2
4 3
5 1
6 5
7 6
8 3
9 6
10 8
11 2
12 4
13 4
14 9
15 10
16 5
17 10
18 11
19 8
20 18
21 18
22 5
23 4
24 7
25 10
26 21
27 25
28 8
29 2
30 20
31 28
32 16
33 32
34 20
35 34
36 3
37 9
38 25
39 21
40 35
41 13
42 20
43 3
44 34
45 2
46 17
47 8
48 12
49 17
50 17
51 49
52 15
53 48
54 27
5...

output:

198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
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198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
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198
198
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198
198
198
198
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198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
198
...

result:

ok 500001 numbers

Test #8:

score: 0
Accepted
time: 2084ms
memory: 40272kb

input:

500000 500000
2 1
3 2
4 2
5 2
6 3
7 2
8 2
9 4
10 1
11 2
12 10
13 6
14 8
15 5
16 13
17 7
18 1
19 16
20 7
21 9
22 15
23 20
24 6
25 2
26 10
27 6
28 2
29 27
30 6
31 24
32 2
33 4
34 5
35 4
36 31
37 5
38 5
39 17
40 19
41 30
42 40
43 2
44 14
45 25
46 37
47 6
48 46
49 19
50 33
51 11
52 1
53 27
54 7
55 47
56...

output:

290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
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290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
290
...

result:

ok 500001 numbers

Test #9:

score: 0
Accepted
time: 2117ms
memory: 40044kb

input:

500000 500000
2 1
3 1
4 2
5 1
6 5
7 5
8 1
9 8
10 5
11 8
12 4
13 9
14 11
15 10
16 11
17 7
18 17
19 12
20 17
21 9
22 9
23 8
24 21
25 17
26 13
27 5
28 10
29 18
30 4
31 19
32 6
33 18
34 10
35 12
36 19
37 13
38 5
39 10
40 33
41 16
42 18
43 20
44 26
45 19
46 1
47 15
48 17
49 48
50 43
51 40
52 29
53 45
54 ...

output:

40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
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40
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40
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40
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40
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40
40
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40
40
40
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40
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40
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40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
...

result:

ok 500001 numbers

Test #10:

score: 0
Accepted
time: 2061ms
memory: 40128kb

input:

500000 500000
2 1
3 2
4 2
5 4
6 2
7 1
8 1
9 5
10 9
11 3
12 3
13 1
14 9
15 6
16 8
17 3
18 9
19 5
20 5
21 5
22 15
23 15
24 7
25 7
26 9
27 26
28 9
29 1
30 28
31 2
32 20
33 28
34 26
35 16
36 7
37 29
38 33
39 13
40 34
41 35
42 27
43 24
44 10
45 12
46 19
47 11
48 38
49 12
50 18
51 19
52 23
53 6
54 33
55 1...

output:

20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
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20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
...

result:

ok 500001 numbers