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QOJ
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 Tour | qzez | AC ✓ | 1574ms | 84408kb | C++14 | 3.3kb | 2023-08-31 10:50:09 | 2023-08-31 10:50:10 |
Judging History
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"