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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 |
---|---|---|---|---|---|---|---|---|---|
#187784 | #6404. Shuttle Tour | UESTC_Guest_WiFi | AC ✓ | 781ms | 149868kb | C++20 | 4.2kb | 2023-09-24 22:26:20 | 2023-09-24 22:26:20 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
using ll=long long;
const int N=2e5;
int n,q;
char s[N+5];
struct E{
int v,w;
E(int v=0,int w=0):v(v),w(w){}
};
vector<E> e[N+5];
int fa[N+5],dep[N+5];
ll dw[N+5];
int sz[N+5],son[N+5],top[N+5];
int dfn[N+5],dfns;
int tot,bl[N+5];
void dfs1(int u,int tf){
dfn[u]=++dfns;
fa[u]=tf; sz[u]=1;
dep[u]=dep[tf]+1;
for(auto it:e[u]){
int v=it.v;
if(v==tf) continue;
dw[v]=dw[u]+it.w;
dfs1(v,u);
if(sz[v]>sz[son[u]]) son[u]=v;
sz[u]+=sz[v];
}
}
void dfs2(int u,int tf){
top[u]=tf;
if(!son[u]) return;
dfs2(son[u],tf);
for(auto it:e[u]){
int v=it.v;
if(v!=son[u]&&v!=fa[u])
dfs2(v,v);
}
}
int LCA(int u,int v){
if(!u||!v) return u+v;
// printf("%d %d\n",u,v);
while(top[u]!=top[v]){
if(dep[top[u]]<dep[top[v]]) swap(u,v);
u=fa[top[u]];
}
return dep[u]<dep[v]?u:v;
}
namespace Segtr{
#define lc id<<1
#define rc id<<1|1
int mx[N*4+5][55],lca[N*4+5];
int cmp(int x,int y){ return !x||!y?x+y:dep[x]<dep[y]?y:x; }
void push_up(int id){
// printf("%d %d ",lca[lc],lca[rc]);
lca[id]=LCA(lca[lc],lca[rc]);
// printf("%d\n",lca[id]);
for(int i=1;i<=tot;i++)
mx[id][i]=cmp(mx[lc][i],mx[rc][i]);
}
void build(int l,int r,int id){
if(l==r){
if(s[l]) lca[id]=mx[id][bl[l]]=l;
return;
}
int mid=l+r>>1;
build(l,mid,lc); build(mid+1,r,rc);
push_up(id);
}
void upd(int l,int r,int p,int id){
if(l==r){
s[l]^=1;
if(s[l]) lca[id]=mx[id][bl[l]]=l;
else lca[id]=mx[id][bl[l]]=0;
return;
}
int mid=l+r>>1;
if(p<=mid) upd(l,mid,p,lc);
else upd(mid+1,r,p,rc);
push_up(id);
}
int res[55];
void update(int val[],int vlca){
res[0]=LCA(res[0],vlca);
for(int i=1;i<=tot;i++)
res[i]=cmp(res[i],val[i]);
}
void query(int l,int r,int st,int en,int id){
if(st<=l&&en>=r){
// printf("%d %d\n",l,r);
update(mx[id],lca[id]); return;
}
int mid=l+r>>1;
if(st<=mid) query(l,mid,st,en,lc);
if(en>mid) query(mid+1,r,st,en,rc);
}
}
using namespace Segtr;
bool used[N+5];
void prep(){
dfs1(1,0); dfs2(1,1);
bl[1]=1;
for(int i=2;i<=n;i++)
if(e[i].size()==1){
tot++;
for(int j=i;j&&!used[j];j=fa[j]){
bl[j]=tot; used[j]=1;
}
}
build(1,n,1);
}
bool cmpv(int x,int y){ return dfn[x]<dfn[y]; }
ll calc(vector<int> ver){
if(!ver.size()) return -1;
sort(ver.begin(),ver.end(),cmpv);
// fprintf(stderr,"ok\n");
static int st[55];
int s=0; ll ans=0;
st[++s]=ver[0];
// fprintf(stderr,"ok");
for(int i=1;i<ver.size();i++){
int u=ver[i],lca=LCA(u,st[s]);
while(s>1&&dep[st[s-1]]>dep[lca]){
ans+=dw[st[s]]-dw[st[s-1]];
s--;
}
if(dep[st[s]]>dep[lca]){
ans+=dw[st[s]]-dw[lca];
s--;
}
if(st[s]!=lca) st[++s]=lca;
st[++s]=u;
}
// puts("");
while(s>1){
ans+=dw[st[s]]-dw[st[s-1]];
s--;
}
return ans<<1;
}
int main(){
scanf("%d %d",&n,&q);
scanf("%s",s+1);
for(int i=1;i<=n;i++) s[i]-='0';
for(int i=1,u,v,w;i<n;i++){
scanf("%d %d %d",&u,&v,&w);
e[u].push_back(E(v,w));
e[v].push_back(E(u,w));
}
prep();
// fprintf(stderr,"%d\n",tot);
while(q--){
int tp,l,r;
scanf("%d %d",&tp,&l);
if(tp==1) upd(1,n,l,1);
else{
scanf("%d",&r);
memset(res,0,sizeof res);
query(1,n,l,r,1);
vector<int> ver;
for(int i=0;i<=tot;i++)
if(res[i]){
// fprintf(stderr,"%d ",res[i]);
ver.push_back(res[i]);
}
// fprintf(stderr,"\n");
printf("%lld\n",calc(ver));
}
}
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 14356kb
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: 125ms
memory: 12356kb
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: 120ms
memory: 13804kb
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: 119ms
memory: 15396kb
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: 3ms
memory: 13652kb
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: 84ms
memory: 149868kb
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: 94ms
memory: 149712kb
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: 95ms
memory: 143444kb
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: 756ms
memory: 141528kb
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: 757ms
memory: 139388kb
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: 781ms
memory: 139472kb
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: 0ms
memory: 13772kb
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: 2ms
memory: 12032kb
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"