QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#19941 | #2214. Link Cut Digraph | wxp# | AC ✓ | 496ms | 49336kb | C++14 | 2.3kb | 2022-02-14 08:52:56 | 2022-05-08 01:39:33 |
Judging History
answer
#include<bits/stdc++.h>
#define rep(i,x,y) for(int i=x;i<=y;++i)
#define vep(i,x) for(int i=0;i<x.size();++i)
#define per(i,x,y) for(int i=x;i>=y;--i)
#define mar(o) for(int E=fst[o];E;E=e[E].nxt)
#define v e[E].to
#define lon long long
#define vi vector <int>
#define pb emplace_back
using namespace std;
const int n7=2012345,m7=10123456;
struct dino{int to,nxt;}e[m7];
int n,m,t,dfn[n7],low[n7],top,sak[n7],in[n7],col[n7],tim,colc;
int vis[n7],lad[n7],ep[n7],eq[n7],fa[n7],siz[n7],ecnt,fst[n7];
lon ans[n7];
vector <int> rab;
int rd(){
int shu=0;bool fu=0;char ch=getchar();
while( !isdigit(ch) ){if(ch=='-')fu=1;ch=getchar();}
while( isdigit(ch) )shu=(shu<<1)+(shu<<3)+ch-'0',ch=getchar();
return fu?-shu:shu;
}
void edge(int p,int q){
int ecntz;
if( rab.size() )ecntz=rab.back(),rab.pop_back();
else ecnt++,ecntz=ecnt;
e[ecntz]=(dino){q,fst[p]};
fst[p]=ecntz;
}
void tarjan(int o){
t++,dfn[o]=low[o]=t;
top++,sak[top]=o,sak[top+1]=0,in[o]=1;
mar(o){
if(!dfn[v])tarjan(v),low[o]=min(low[o],low[v]);
else if(in[v])low[o]=min(low[o],dfn[v]);
}
if(dfn[o]^low[o])return;
colc++,lad[colc]=o;
while(sak[top+1]^o){
in[ sak[top] ]=0;
col[ sak[top] ]=colc;
top--;
}
}
void clear(int o){
mar(o)rab.pb(E);
vis[o]=tim,fst[o]=dfn[o]=low[o]=0;
}
int getf(int z){
while(z^fa[z])z=fa[z]=fa[ fa[z] ];
return z;
}
void dopart(int l,int r,vi now){
tim++;int mid=(l+r)>>1;
vi nev;
vep(i,now){
if(now[i]>mid)continue;
int d1=getf(ep[ now[i] ]),d2=getf(eq[ now[i] ]);
if(vis[d1]^tim)clear(d1),nev.pb(d1);
if(vis[d2]^tim)clear(d2),nev.pb(d2);
edge(d1,d2);
}
vep(i,nev)if(!dfn[ nev[i] ])tarjan(nev[i]);
if(l==r){
vep(i,nev){
int fa1=getf(nev[i]),fa2=getf(lad[ col[ nev[i] ] ]);
if(fa1==fa2)continue;
ans[l]=ans[l]+1ll*siz[fa1]*siz[fa2];
fa[fa1]=fa2,siz[fa2]+=siz[fa1];
}
}
else{
vi nowl,nowr;
vep(i,now){
int d1=getf(ep[ now[i] ]),d2=getf(eq[ now[i] ]);
if(vis[d1]==tim&&vis[d2]==tim&&col[d1]==col[d2])nowl.pb(now[i]);
else nowr.pb(now[i]);
}
dopart(l,mid,nowl),dopart(mid+1,r,nowr);
}
}
int main(){
n=rd(),m=rd();
rep(i,1,m)ep[i]=rd(),eq[i]=rd();
rep(i,1,n)fa[i]=i,siz[i]=1;
vi tmp;
rep(i,1,m)tmp.pb(i);
dopart(1,m,tmp);
rep(i,1,m)ans[i]+=ans[i-1],printf("%lld\n",ans[i]);
return 0;
return 0;
}
Details
Test #1:
score: 100
Accepted
time: 461ms
memory: 43020kb
Test #2:
score: 0
Accepted
time: 460ms
memory: 43148kb
Test #3:
score: 0
Accepted
time: 494ms
memory: 43104kb
Test #4:
score: 0
Accepted
time: 383ms
memory: 47856kb
Test #5:
score: 0
Accepted
time: 491ms
memory: 43340kb
Test #6:
score: 0
Accepted
time: 433ms
memory: 43296kb
Test #7:
score: 0
Accepted
time: 437ms
memory: 42268kb
Test #8:
score: 0
Accepted
time: 433ms
memory: 43436kb
Test #9:
score: 0
Accepted
time: 320ms
memory: 49132kb
Test #10:
score: 0
Accepted
time: 428ms
memory: 43904kb
Test #11:
score: 0
Accepted
time: 465ms
memory: 42800kb
Test #12:
score: 0
Accepted
time: 457ms
memory: 43108kb
Test #13:
score: 0
Accepted
time: 368ms
memory: 49336kb
Test #14:
score: 0
Accepted
time: 379ms
memory: 49248kb
Test #15:
score: 0
Accepted
time: 192ms
memory: 33680kb
Test #16:
score: 0
Accepted
time: 412ms
memory: 36812kb
Test #17:
score: 0
Accepted
time: 392ms
memory: 36456kb
Test #18:
score: 0
Accepted
time: 383ms
memory: 37440kb
Test #19:
score: 0
Accepted
time: 496ms
memory: 43840kb
Test #20:
score: 0
Accepted
time: 427ms
memory: 43736kb
Test #21:
score: 0
Accepted
time: 380ms
memory: 44084kb
Test #22:
score: 0
Accepted
time: 406ms
memory: 43832kb
Test #23:
score: 0
Accepted
time: 397ms
memory: 43724kb
Test #24:
score: 0
Accepted
time: 445ms
memory: 43684kb
Test #25:
score: 0
Accepted
time: 423ms
memory: 43924kb
Test #26:
score: 0
Accepted
time: 407ms
memory: 43060kb
Test #27:
score: 0
Accepted
time: 401ms
memory: 42024kb