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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 |
---|---|---|---|---|---|---|---|---|---|
#109991 | #6404. Shuttle Tour | grass8cow | AC ✓ | 2927ms | 46168kb | C++14 | 2.7kb | 2023-05-31 09:16:49 | 2023-05-31 09:16:50 |
Judging History
answer
#include<bits/stdc++.h>
#define ll long long
using namespace std;
ll d[201000];
int fa[201000],top[201000],sz[201000],dfn[201000],n,q,bel[200100];
struct ed{int v,w;};
vector<ed>g[200100];
int son[201000],a[201000],di[200100];
char C[200100];
#define pb push_back
void dfs(int x){
sz[x]=1;int mt=-1;
for(ed t:g[x])if(t.v!=fa[x]){
fa[t.v]=x,d[t.v]=d[x]+t.w,di[t.v]=di[x]+1,dfs(t.v),sz[x]+=sz[t.v];
if(mt<sz[t.v])mt=sz[t.v],son[x]=t.v;
}
}
int lca(int a,int b){
if(a==-1)return b;
if(b==-1)return a;
while(top[a]!=top[b]){
if(di[top[a]]<di[top[b]])swap(a,b);
a=fa[top[a]];
}
if(di[a]>di[b])swap(a,b);return a;
}
vector<int>zb;
void dfs2(int x,int ff){
top[x]=ff,bel[dfn[x]=++dfn[0]]=x;
if(x==top[x])zb.pb(x);
if(!son[x])return;
dfs2(son[x],ff);
for(ed t:g[x])if(t.v!=son[x]&&t.v!=fa[x])dfs2(t.v,t.v);
}
int lc[800100];
void build(int p,int l,int r){
if(l==r){lc[p]=(a[l]?l:-1);return;}
int mid=(l+r)>>1;
build(p<<1,l,mid),build(p<<1|1,mid+1,r);
lc[p]=lca(lc[p<<1],lc[p<<1|1]);
}
void ud(int p,int l,int r,int x){
if(l==r){lc[p]=(a[l]?l:-1);return;}
int mid=(l+r)>>1;
if(x<=mid)ud(p<<1,l,mid,x);
else ud(p<<1|1,mid+1,r,x);
lc[p]=lca(lc[p<<1],lc[p<<1|1]);
}
int as(int p,int l,int r,int x,int y){
if(y<l||x>r||lc[p]==-1)return -1;
if(x<=l&&r<=y)return lc[p];int mid=(l+r)>>1;
return lca(as(p<<1,l,mid,x,y),as(p<<1|1,mid+1,r,x,y));
}
int T[201000],cn,ls[20010000],rs[20010000],mx[20100000];
void up(int &o,int l,int r,int x,int z){
if(!o)o=++cn;
if(l==r){mx[o]=z;return;}
int mid=(l+r)>>1;if(x<=mid)up(ls[o],l,mid,x,z);
else up(rs[o],mid+1,r,x,z);
mx[o]=max(mx[ls[o]],mx[rs[o]]);
}
int ask(int p,int l,int r,int x,int y){
if(y<l||x>r||!p)return 0;
if(x<=l&&r<=y)return mx[p];
int mid=(l+r)>>1;
return max(ask(ls[p],l,mid,x,y),ask(rs[p],mid+1,r,x,y));
}
int main(){
scanf("%d%d%s",&n,&q,C+1);
for(int i=1;i<=n;i++)a[i]=C[i]-'0';
for(int i=1,u,v,w;i<n;i++){
scanf("%d%d%d",&u,&v,&w);
g[u].pb((ed){v,w}),g[v].pb((ed){u,w});
}
dfs(1),dfs2(1,1);
build(1,1,n);
for(int x=1;x<=n;x++)if(a[x]){
int u=x;
while(u)up(T[top[u]],1,n,x,dfn[u]),u=fa[top[u]];
}
//维护区间最大值。
for(int i=1,op,l,r,x;i<=q;i++){
scanf("%d",&op);
if(op==2){
//对于每个链维护出来最大的被搞的点
scanf("%d%d",&l,&r);int u=as(1,1,n,l,r);
if(u==-1)puts("-1");
else{
ll ans=-d[u];
for(int x:zb){
int si=ask(T[x],1,n,l,r);
if(si>0)ans+=d[bel[si]]-d[fa[x]];
}
printf("%lld\n",ans*2);
}
}
else{
scanf("%d",&x),a[x]^=1;
ud(1,1,n,x);int u=x;
while(u)up(T[top[u]],1,n,x,a[x]?dfn[u]:0),u=fa[top[u]];
}
}
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 4ms
memory: 13884kb
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: 172ms
memory: 10424kb
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: 128ms
memory: 12104kb
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: 133ms
memory: 9832kb
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: 4ms
memory: 12104kb
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: 175ms
memory: 42776kb
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: 164ms
memory: 43680kb
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: 194ms
memory: 40788kb
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: 2410ms
memory: 44776kb
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: 2927ms
memory: 45452kb
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: 2497ms
memory: 46168kb
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: 13880kb
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: 4ms
memory: 13844kb
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"