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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
#787058#6404. Shuttle TourASnownAC ✓2658ms787012kbC++174.0kb2024-11-27 09:17:112024-11-27 09:17:13

Judging History

你现在查看的是最新测评结果

  • [2024-11-27 09:17:13]
  • 评测
  • 测评结果:AC
  • 用时:2658ms
  • 内存:787012kb
  • [2024-11-27 09:17:11]
  • 提交

answer

#include<bits/stdc++.h>
#define file(F) freopen(#F".in","r",stdin),freopen(#F".out","w",stdout)
#define lowbit(x) ((x)&-(x))
#define ALL(x) (x).begin(),(x).end()
#define debug(...) fprintf(stderr,__VA_ARGS__)
#define popc(x) (__builtin_popcountll((x)))
#define abs(x) ((x)>=0?(x):-(x))
using namespace std;
using ll=long long;
using uint=uint32_t;
template<typename T>
inline bool Max(T &x,T y) { return std::less<T>()(x,y)&&(x=y,true); }
template<typename T>
inline bool Min(T &x,T y) { return std::less<T>()(y,x)&&(x=y,true); }
void Solve();
const int N = 2e5+25;
int n,Q;
bool lt[N];
vector<pair<int,int>> e[N];
ll dis[N];
int dfn[N],pos[N],dfx,ed[N];
vector<int> top; int tp[N];
int st[N][20];
void dfs(int u,int fa,int t) {
   pos[dfn[u]=++dfx]=u;
   if(u==t) top.emplace_back(t); tp[u]=top.size()-1;
   st[dfn[u]][0]=fa;
   int son=0; for(auto [v,w]:e[u]) if(v!=fa) {
      dis[v]=dis[u]+w; dfs(son=v,u,t); break;
   } ed[u]=dfx;
   for(auto [v,w]:e[u]) if(v!=fa&&v!=son) {
      dis[v]=dis[u]+w; dfs(v,u,v);
   }
}
int LCA(int x,int y) {
   if(x==y) return x;
   if((x=dfn[x])>(y=dfn[y])) swap(x,y);
   int l=__lg(y-x++);
   return min(st[x][l],st[y-(1<<l)+1][l],
    [](int a,int b){ return dfn[a]<dfn[b]; });
}
inline ll dist(int x,int y) { return dis[x]+dis[y]-2*dis[LCA(x,y)]; }
struct SGT {
#define mid ((L+R)>>1)
#define ls (u<<1)
#define rs (ls|1)
int mx[N<<2],mn[N<<2];
set<int> leaf[N];
void build(int u,int L,int R) {
   mx[u]=0,mn[u]=N;
   if(L==R) return void(leaf[L].clear());
   build(ls,L,mid),build(rs,mid+1,R);
}
void insert(int u,int L,int R,int x,int k) {
   if(L==R) {
      leaf[L].insert(k);
      mx[u]=*leaf[L].rbegin();
      mn[u]=*leaf[L].begin();
      return ;
   }
   if(x<=mid) insert(ls,L,mid,x,k);
   else insert(rs,mid+1,R,x,k);
   mx[u]=max(mx[ls],mx[rs]),mn[u]=min(mn[ls],mn[rs]);
}
void erase(int u,int L,int R,int x,int k) {
   if(L==R) {
      leaf[L].erase(k);
      if(leaf[L].empty())
         mx[u]=0,mn[u]=N;
      else {
         mx[u]=*leaf[L].rbegin();
         mn[u]=*leaf[L].begin();
      }
      return ;
   }
   if(x<=mid) erase(ls,L,mid,x,k);
   else erase(rs,mid+1,R,x,k);
   mx[u]=max(mx[ls],mx[rs]),mn[u]=min(mn[ls],mn[rs]);
}
int querymx(int u,int L,int R,int l,int r) {
   if(l<=L&&R<=r) return mx[u];
   if(r<=mid) return querymx(ls,L,mid,l,r);
   if(l> mid) return querymx(rs,mid+1,R,l,r);
   return max(querymx(ls,L,mid,l,r),querymx(rs,mid+1,R,l,r));
}
int querymn(int u,int L,int R,int l,int r) {
   if(l<=L&&R<=r) return mn[u];
   if(r<=mid) return querymn(ls,L,mid,l,r);
   if(l> mid) return querymn(rs,mid+1,R,l,r);
   return min(querymn(ls,L,mid,l,r),querymn(rs,mid+1,R,l,r));
}
#undef mid
#undef ls
#undef rs
} t[55];
signed main() {
#ifndef ONLINE_JUDGE
#endif
   cin.tie(nullptr)->sync_with_stdio(false);
   Solve();
}
void Solve() {
   cin>>n>>Q;
   for(int i=1;i<=n;i++) {
      char ch; cin>>ch;
      lt[i]=ch=='1';
   }
   for(int i=1;i<n;i++) {
      int u,v,w; cin>>u>>v>>w;
      e[u].emplace_back(v,w);
      e[v].emplace_back(u,w);
   }
   dfs(1,0,1);
   for(int l=0;l<19;l++) for(int i=1;i+(1<<l+1)-1<=n;i++)
      st[i][l+1]=min(st[i][l],st[i+(1<<l)][l],
       [](int a,int b){ return dfn[a]<dfn[b]; });
   for(int i=0;i<top.size();i++) t[i].build(1,1,n);
   for(int i=1;i<=n;i++) if(lt[i]) t[tp[i]].insert(1,1,n,i,dfn[i]);
   while(Q--) {
      int op,x,y; cin>>op;
      if(op==1) {
         cin>>x;
         if(lt[x]^=1) t[tp[x]].insert(1,1,n,x,dfn[x]);
         else t[tp[x]].erase(1,1,n,x,dfn[x]);
      } else {
         cin>>x>>y;
         int rt=0,ed=0;
         ll ans=0;
         for(int i=0;i<top.size();i++) {
            int p=t[i].querymn(1,1,n,x,y);
            int q=t[i].querymx(1,1,n,x,y);
            if(p>q) continue; p=pos[p],q=pos[q];
            ans+=dist(p,q); if(!rt) rt=p;
            if(ed) ans+=dist(ed,p); ed=q;
         }
         if(rt) printf("%lld\n",ans+dist(ed,rt));
         else puts("-1");
      }
   }
}

详细

Test #1:

score: 100
Accepted
time: 63ms
memory: 575312kb

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: 196ms
memory: 576524kb

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: 178ms
memory: 578820kb

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: 176ms
memory: 578040kb

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: 64ms
memory: 578792kb

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: 158ms
memory: 622928kb

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: 211ms
memory: 628924kb

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: 269ms
memory: 782600kb

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: 2619ms
memory: 787012kb

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: 2653ms
memory: 784864kb

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: 2658ms
memory: 784460kb

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: 56ms
memory: 584272kb

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: 51ms
memory: 585184kb

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"