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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#153926#6404. Shuttle TourqzezAC ✓1574ms84408kbC++143.3kb2023-08-31 10:50:092023-08-31 10:50:10

Judging History

你现在查看的是最新测评结果

  • [2023-08-31 10:50:10]
  • 评测
  • 测评结果:AC
  • 用时:1574ms
  • 内存:84408kb
  • [2023-08-31 10:50:09]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
using ll=long long;
template<typename T>
ostream& operator << (ostream &out,const vector<T>&x){
	if(x.empty())return out<<"[]";
	out<<'['<<x[0];
	for(int len=x.size(),i=1;i<len;i++)out<<','<<x[i];
	return out<<']';
}
template<typename T>
vector<T> ary(const T *a,int l,int r){
	return vector<T>{a+l,a+1+r};
}
template<typename T>
void debug(T x){
	cerr<<x<<'\n';
}
template<typename T,typename ...S>
void debug(T x,S ...y){
	cerr<<x<<' ',debug(y...);
}
const int N=2e5+10;
int n,m;
char a[N];
vector<pair<int,int> >to[N];
namespace EUR{
	const int V=N*2,K=__lg(V)+2;
	int dft,bg[N],ed[N],dep[N],f[K][V];
	ll dis[N];
	int Min(int x,int y){
		return dep[x]<dep[y]?x:y;
	}
	#define v e.first
	#define w e.second
	void dfs(int u,int fa=0){
		dep[u]=dep[fa]+1;
		f[0][bg[u]=++dft]=u;
		for(auto e:to[u])if(v^fa){
			dis[v]=dis[u]+w,dfs(v,u);
			f[0][++dft]=u;
		}
		ed[u]=dft;
	}
	#undef v
	#undef w
	void init(){
		dfs(1);
		for(int i=1;(1<<i)<=dft;i++){
			for(int j=1;j+(1<<i)-1<=dft;j++){
				f[i][j]=Min(f[i-1][j],f[i-1][j+(1<<i-1)]);
			}
		}
	}
	int LCA(int l,int r){
		if(l=bg[l],r=bg[r],l>r)swap(l,r);
		int k=__lg(r-l+1);
		return Min(f[k][l],f[k][r-(1<<k)+1]);
	}
	ll dist(int u,int v){
		// debug("dist",u,v,dis[u]+dis[v]-dis[LCA(u,v)]*2);
		return dis[u]+dis[v]-dis[LCA(u,v)]*2;
	}
	bool isin(int u,int t){
		return bg[t]<=bg[u]&&bg[u]<=ed[t];
	}
}
using EUR::LCA;
using EUR::dist;
using EUR::isin;
using EUR::bg;
using vi=vector<int>;
vi t[N<<2];
bool cmp(const int &x,const int &y){
	return bg[x]<bg[y];
}
void reduce(vi &A){
	int len=1,n=A.size();
	if(n<2)return;
	for(int i=2;i<n;i++){
		if(isin(A[i],A[len]))A[len]=A[i];
		else A[++len]=A[i];
	}
	A.erase(A.begin()+len+1,A.end());
}
vi merge(const vi &A,const vi &B){
	vi C(A.size()+B.size());
	merge(A.begin(),A.end(),B.begin(),B.end(),C.begin(),cmp);
	// debug(A,B,C);
	reduce(C);
	return C;
}
void pushup(int rt){
	t[rt]=merge(t[rt<<1],t[rt<<1|1]);
}
void build(int l=1,int r=n,int rt=1){
	if(l==r){
		if(a[l]&1)t[rt]={l};
		else t[rt]={};
		return;
	}
	int mid=(l+r)>>1;
	build(l,mid,rt<<1);
	build(mid+1,r,rt<<1|1);
	pushup(rt);
}
void update(int x,int l=1,int r=n,int rt=1){
	if(l==r){
		if(a[x]&1)t[rt]={x};
		else t[rt]={};
		return;
	}
	int mid=(l+r)>>1;
	if(x<=mid)update(x,l,mid,rt<<1);
	else update(x,mid+1,r,rt<<1|1);
	pushup(rt);
}
void query(int L,int R,vi &ans,int l=1,int r=n,int rt=1){
	if(L<=l&&r<=R){
		ans=merge(ans,t[rt]);return;
	}
	int mid=(l+r)>>1;
	if(L<=mid)query(L,R,ans,l,mid,rt<<1);
	if(mid<R)query(L,R,ans,mid+1,r,rt<<1|1);
}
int main(){
	scanf("%d%d%s",&n,&m,a+1);
	for(int i=1,u,v,w;i<n;i++){
		scanf("%d%d%d",&u,&v,&w);
		to[u].push_back({v,w}),to[v].push_back({u,w});
	}
	EUR::init();
	build();
	// debug(ary(bg,1,n));
	for(int op,x,y;m--;){
		scanf("%d%d",&op,&x);
		if(op==1){
			a[x]^=1,update(x);
		}else{
			scanf("%d",&y);
			vi ans;
			query(x,y,ans);
			int len=ans.size();
			// debug(a+1,x,y,ans);
			if(ans.empty()){
				puts("-1");continue;
			}
			ll sum=0;
			for(int i=0;i<len;i++)sum+=dist(ans[i],ans[(i+1)%len]);
			// sum*=2;
			// debug(sum);
			// for(int i=0;i<len;i++){
			// 	for(int j=i+1;j<len;j++){
			// 		mx=max(mx,dist(ans[i],ans[j]));
			// 	}
			// }
			printf("%lld\n",sum);
		}
	}
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 3ms
memory: 35644kb

input:

5 6
10110
1 2 1
1 3 10
2 4 100
3 5 1000
2 1 5
1 3
2 1 5
2 2 4
2 5 5
2 1 1

output:

222
202
0
-1
0

result:

ok 5 number(s): "222 202 0 -1 0"

Test #2:

score: 0
Accepted
time: 88ms
memory: 39676kb

input:

50 200000
00100100100001101010110100000111100011101110011010
14 47 940241413
11 43 331483591
37 38 496247070
47 46 832459694
7 15 16479291
1 30 402388666
30 8 513064064
46 50 739311480
5 4 761894947
32 41 631669659
17 24 715786564
35 20 763151642
32 33 492466005
39 11 186023146
9 7 805081251
3 42 25...

output:

17149847378
-1
26540740138
29613692754
21307948558
27003443184
11893407374
18332625722
20412196350
20281573062
29727468956
9593307160
9380710234
23682775470
16688997988
2856655228
14982588156
0
-1
9140136614
26193602866
22558599316
24807163344
19126284190
8533875940
7695830712
18079494744
0
27004673...

result:

ok 100000 numbers

Test #3:

score: 0
Accepted
time: 107ms
memory: 39808kb

input:

50 200000
10010001110011101101101011010011100101101010111001
1 25 560163135
2 7 696374536
33 39 14485266
39 22 456690113
4 5 267811886
18 6 657680382
3 43 865617406
25 14 885515220
41 34 919525052
42 50 410634144
8 3 487403277
3 30 701549676
2 43 54223104
7 34 691078766
14 23 323352590
26 48 4936558...

output:

17177676326
31373486130
15290175638
8192974494
22734716092
27802380120
6315957348
0
15780401446
15929384564
26423899248
9639532596
21199366790
26413065782
-1
29063665908
29925313598
28651879288
17144176262
16526083688
28206620550
26873163342
14840246174
32414950818
29985336496
0
11937422088
11131990...

result:

ok 100000 numbers

Test #4:

score: 0
Accepted
time: 111ms
memory: 41880kb

input:

50 200000
01011001001010000100001101100111011001101011101000
34 29 654100339
33 5 947063765
45 25 962067151
11 13 509130797
26 47 988757358
49 22 75267557
7 11 431530851
46 1 531969122
22 43 449891945
34 6 526679193
50 17 499004364
22 23 226725950
26 48 203414490
11 44 900725507
10 29 451714017
35 2...

output:

24080362406
0
0
21418182584
28358635244
28257750030
24520294678
21418182584
0
15335211126
28621468542
18664505530
19335499776
32374868794
23618866752
26801803500
24116134918
27676993638
30222353942
25612316674
20504702130
28400398734
29472795250
24400110084
20586186786
25612316674
0
30067400886
1297...

result:

ok 100000 numbers

Test #5:

score: 0
Accepted
time: 1ms
memory: 31480kb

input:

2 10
01
1 2 340134039
2 1 2
1 1
2 1 2
1 2
2 1 1
1 2
2 2 2
1 2
2 2 2
1 1

output:

0
680268078
0
0
-1

result:

ok 5 number(s): "0 680268078 0 0 -1"

Test #6:

score: 0
Accepted
time: 129ms
memory: 84232kb

input:

200000 100
1100001001001101010000111111011011101010001011011011011010101111010001111010101100101001010000110100100011111010011100101010010001011010111100101110010000101010000100111100000011001100111101110011000011010011011011100101100111101010111101110111001111111010001010010000110110100000111000111...

output:

187263442365796
187267199881816
187176203274470
187269896250018
187239740690858
186974761323092
187257776119514
187269896250018
187035239640930
186911636122472
187263030332128
187121605387264
187264313877130
187263442365796
187269896250018
187249588971104
187263442365796
187263442365796
187264313877...

result:

ok 50 numbers

Test #7:

score: 0
Accepted
time: 96ms
memory: 84408kb

input:

200000 100
1000100001000101011000010111101000110001110111010000000010100100001110001110011001001011000010001000101111000111000100111101111111011111101101011110010101110000011011000101010000101110000100101000101110011111110000010011010010001001010001101000001111001001011111110100100011011100010100101...

output:

187406582272754
187713357625510
187713357625510
187710409039730
187708440524170
187705546874918
187675370061160
187696435101958
187704004975728
187708440524170
187708440524170
187490194913408
186797006090958
187708440524170
187708440524170
187694259450196
187691068337432
187699562335668
187708440524...

result:

ok 50 numbers

Test #8:

score: 0
Accepted
time: 132ms
memory: 78748kb

input:

200000 100
1101110101111010101100101110111101001010101100011111011010101101001011000101011011110110110001000000110000100110101010001011100110100101010110001111000100011010101011100011111010111001011110110001001010000001010100000000100010010000110100101010000111010100100111001011101001000011010101011...

output:

187071935465024
186902015424650
186944515923806
187083386398370
187083386398370
186176053533638
187210565613960
186840136921858
187059112646348
186963648681914
187157614978100
187171857507720
186687953621656
187037985042418
184267618052908
185811051686090
186716949587794
186666528269428
186754258305...

result:

ok 50 numbers

Test #9:

score: 0
Accepted
time: 1574ms
memory: 79036kb

input:

200000 200000
1010011001010010101000001000111111110110111100000011000110010101000001101110111000100011010101100011001011101100010100000010100000100110100001000111010000011001010111001001000000111001100110010100101010111000000000011110101110010101110110110101100001011001101010101001000010000010000000...

output:

185874943612396
186901189463748
185325592077116
187007806200644
185723936146376
186683200699722
186830061692652
186256265895174
186860903405924
186810412385682
186744028102060
186994420108608
186831837842360
180459525430870
186966649455016
186952309712742
185810351127924
186849618327982
186494273101...

result:

ok 100000 numbers

Test #10:

score: 0
Accepted
time: 1550ms
memory: 79048kb

input:

200000 200000
1101100101010001011001101010110111010000001100111000100010001111101101110111001101000001101011010000001110101101001010011000001011000101010111001101100100101001100111010001101010011100101100010110000011110101101011000011101101010111101000000111100100011101000110011100011000010010001011...

output:

187559700459682
187535810670694
187366757549978
187509694959444
186405180245408
187572993046976
186802217032708
186278525122374
187171989295434
187404069323808
187366390326582
184670301024044
186230793287498
187530780070456
187597311483370
187406310330638
187384636670170
187047338416520
187544270920...

result:

ok 100000 numbers

Test #11:

score: 0
Accepted
time: 1540ms
memory: 78512kb

input:

200000 200000
0011111000111101101011111111000010101011010000100000110110010110010000011010101011101001100001001001000001100110010100101101001111000111010011110100000100000001111111000001000101000011110001101101111000101001100010010011001101100111110000110001100001100011110011001100100010000010001101...

output:

187057082821034
187050489592834
185798962075874
186490497612254
185547643085476
185839649755426
186731725449660
186845143722558
186446910671932
186830913714546
186903848544526
186827856700414
187012840145598
187030896936824
186738571374322
186338959389628
186977751482606
187075649881228
186978915850...

result:

ok 100000 numbers

Test #12:

score: 0
Accepted
time: 1ms
memory: 29492kb

input:

1 3
0
2 1 1
1 1
2 1 1

output:

-1
0

result:

ok 2 number(s): "-1 0"

Test #13:

score: 0
Accepted
time: 3ms
memory: 35668kb

input:

7 2
0001100
1 2 1
2 3 10
3 4 100
4 5 1000
3 6 10000
6 7 100000
2 1 7
2 2 6

output:

2000
2000

result:

ok 2 number(s): "2000 2000"