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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#860744#9676. Ancestorstebiezhichu0 851ms87072kbC++143.1kb2025-01-18 14:47:522025-01-18 14:50:54

Judging History

你现在查看的是最新测评结果

  • [2025-01-18 14:50:54]
  • 评测
  • 测评结果:0
  • 用时:851ms
  • 内存:87072kb
  • [2025-01-18 14:47:52]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
const int maxn=2e5+10;
int n,m,fa[maxn],rt,dep[maxn],top,pre[maxn],x,y,z,C[maxn],ans[maxn];
struct edge{
	int x;
	int y;
	int z;
	int zmax;
	int op;
	int ans;
}st[maxn*100];
vector<int>tu[maxn];
set<pair<int,int> >s[maxn];
inline void add(int q,int w){
	if(!pre[q]||dep[q]==dep[w]){
		return;
	}
	top++;
	st[top].x=pre[q];
	st[top].y=q;
	st[top].z=dep[q]-dep[w];
	st[top].op=0;
	st[top].ans=1;
	return;
}
inline void del(int q,int w){
	if(!pre[q]||dep[q]==dep[w]){
		return;
	}
	top++;
	st[top].x=pre[q];
	st[top].y=q;
	st[top].z=dep[q]-dep[w];
	st[top].op=0;
	st[top].ans=-1;
	return;
}
inline void merge(int q,int w){
	if(s[q].size()<s[w].size()){
		swap(s[q],s[w]);
	}
	for(auto v:s[w]){
		auto it=s[q].lower_bound(v);
		if(it!=s[q].begin()){
			it--;
			if((*it).first==v.first){
				del(v.second,q);
				pre[v.second]=(*it).second;
				add(v.second,q);
			}
			it++;
		}
		it=s[q].upper_bound(v);
		if(it!=s[q].end()&&(*it).first==v.first){
			del((*it).second,q);
			pre[(*it).second]=v.second;
			add((*it).second,q);
		}
		s[q].insert(v);
	}
	return;
}
inline void dfs(int q,int w){
	dep[q]=dep[w]+1;
	s[q].insert({dep[q],q});
	add(q,q);
	for(int i=0;i<tu[q].size();i++){
		dfs(tu[q][i],q);
		merge(q,tu[q][i]);
	}
	return;
}
inline int cp(edge q,edge w){
	return q.op>w.op;
}
struct node{
	inline int lowbit(int q){
		return q&(-q);
	}
	inline void add(int q,int w){
		for(int i=q;i<=n;i+=lowbit(i)){
			C[i]+=w;
		}
		return;
	}
	inline int query(int q){
		int he=0;
		for(int i=q;i;i-=lowbit(i)){
			he+=C[i];
		}
		return he;
	}
}tree;
inline int cmp(edge q,edge w){
	if(q.y!=w.y){
		return q.y<w.y;
	}
	return q.op<w.op;
}
inline int cm(edge q,edge w){
	if(q.x!=w.x){
		return q.x>w.x;
	}
	return q.op<w.op;
}
inline void cdq(int l,int r){
	if(l>=r){
		return;
	}
	int mid=(l+r)/2;
	cdq(l,mid);
	cdq(mid+1,r);
	int zl=l,zr=mid+1;
	while(zl!=mid+1||zr!=r+1){
		if(zr==r+1||(zl!=mid+1&&st[zl].y<=st[zr].y)){
			if(st[zl].op==0){
				tree.add(st[zl].z,st[zl].ans);
				tree.add(st[zl].zmax,-st[zl].ans);
			}
			zl++;
		}
		else{
			if(st[zr].op!=0){
				st[zr].ans+=tree.query(st[zr].z);
			}
			zr++;
		}
	}
	for(int i=l;i<=mid;i++){
		if(st[i].op==0){
			tree.add(st[i].z,-st[i].ans);
		}
	}
	inplace_merge(st+l,st+mid+1,st+r+1,cmp);
	return;
}
signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0),cout.tie(0);
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		cin>>fa[i];
		if(!fa[i]){
			rt=i;
		}
		else{
			tu[fa[i]].push_back(i);
		}
	}
	dfs(rt,0);
	for(int i=1;i<=top;i++){
		st[i].zmax=dep[st[i].y];
	}
	for(int i=1;i<=n;i++){
		top++;
		st[top].x=i;
		st[top].y=i;
		st[top].z=dep[i];
		st[top].zmax=n+1;
		st[top].op=0;
		st[top].ans=1;
	}
	for(int i=1;i<=m;i++){
		cin>>x>>y>>z;
		top++;
		st[top].x=x;
		st[top].y=y;
		st[top].z=z;
		st[top].op=i;
	}
	sort(st+1,st+1+top,cm);
	cdq(1,top);
	sort(st+1,st+1+top,cp);
	for(int i=m;i>=1;i--){
		cout<<st[i].y-st[i].x+1-st[i].ans<<'\n';
	}
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 0
Wrong Answer

Test #1:

score: 0
Wrong Answer
time: 3ms
memory: 23276kb

input:

7 5
3 1 0 5 3 5 1
1 3 1
5 7 2
1 5 1
4 7 1
4 7 2

output:

2
1
3
3
2

result:

wrong answer 5th numbers differ - expected: '1', found: '2'

Subtask #2:

score: 0
Skipped

Dependency #1:

0%

Subtask #3:

score: 0
Wrong Answer

Test #30:

score: 17
Accepted
time: 203ms
memory: 38724kb

input:

50000 200000
42574 43129 47328 17982 40521 6668 12729 32377 201 11940 8599 11734 18349 41045 26854 22540 9897 33419 7463 1243 47272 27135 49050 49111 22435 42539 39924 20272 5843 9308 45963 3283 31185 13692 38952 20583 15885 24802 4773 953 49907 28689 36942 23550 19449 8970 33340 31665 5407 46023 18...

output:

12045
1321
12292
2444
32443
36534
38575
30505
16464
16648
47153
41144
23401
1762
18567
6831
26486
29716
8905
16295
38569
29990
22061
7638
3820
34754
17582
6466
12632
23384
11657
16493
24434
11503
3945
2205
37806
13036
29052
24114
39158
34702
37326
20815
11766
41253
44355
17807
23452
26717
43107
4133...

result:

ok 200000 numbers

Test #31:

score: 0
Wrong Answer
time: 221ms
memory: 41080kb

input:

50000 200000
13611 7267 47234 19765 39458 30493 19935 34465 46369 11995 35207 5752 13718 47418 12913 13725 27694 47726 25253 30406 27587 25790 21091 12008 13534 8804 26484 34270 33810 49102 25288 37607 11863 23340 22747 40502 4461 24803 31317 25617 46077 6504 46299 34533 6829 17841 2812 35413 16394 ...

output:

776234
1436968
451967
1226382
815133
749837
857436
837828
767495
45137
978189
1025169
410589
548573
684677
843707
584876
226110
383829
477714
788642
1128982
800669
952073
752866
265580
490867
247758
530872
148258
388906
974576
676336
410062
287718
399723
955671
1152304
875595
430923
618902
924907
47...

result:

wrong answer 1st numbers differ - expected: '14606', found: '776234'

Subtask #4:

score: 0
Skipped

Dependency #3:

0%

Subtask #5:

score: 0
Wrong Answer

Test #67:

score: 17
Accepted
time: 817ms
memory: 85200kb

input:

100000 1000000
6457 23693 90928 23592 90440 75018 16865 3342 83718 16731 95103 31510 38719 27886 29093 41955 6596 46409 51839 10527 91993 61074 14405 34833 53674 42363 11490 43757 46191 6058 59164 96938 57858 40178 97523 84164 21582 72243 11267 47368 97058 6637 95208 60092 53943 16441 28363 64965 52...

output:

52956
18767
1319
13405
11021
455
50595
81481
6813
3640
58937
10991
70
4713
36
9517
39731
1166
67346
74637
2667
45182
4914
6774
1625
4198
52270
30435
60137
48654
29768
2815
6846
73091
21944
49693
9923
46795
29787
6866
2435
20773
2959
34666
4377
2428
4582
7527
38292
7253
3586
63817
28075
43828
20215
1...

result:

ok 1000000 numbers

Test #68:

score: 0
Wrong Answer
time: 851ms
memory: 87072kb

input:

100000 1000000
82160 95864 48267 17482 19568 35077 14202 20440 4649 64145 148 2227 6969 39096 36508 20991 67700 90300 69215 57284 18492 9246 9629 7538 7845 30368 55600 48445 18542 41242 45052 25380 20894 91677 77040 73134 15572 21966 25343 14501 16227 23870 39207 50024 30787 11148 16884 63700 33205 ...

output:

812208
1266751
2201151
739445
261472
1517614
1518518
2103957
502980
1816548
2127891
2017429
1253517
383246
1407574
1116729
335544
788712
1671901
2067807
1504537
1193556
2393433
741726
2228418
2661703
267209
2245115
1422029
1608109
970326
1732903
588973
1177095
1161159
1579267
817011
1903257
1803753
...

result:

wrong answer 1st numbers differ - expected: '44469', found: '812208'

Subtask #6:

score: 0
Skipped

Dependency #1:

0%