#include<stdio.h>
int hi(int a,int b){return a>b?a:b;}
unsigned X=12345;int rand_(){return(X*=3)>>1;}
int(*compar)(int,int);void sort(int*aa,int l,int r){ while(l<r){ int i=l,j=l,k=r,t,p=aa[l+rand_()%(r-l)]; while(j<k)switch(compar(aa[j],p)){case 0:++j;break;case -1:t=aa[i],aa[i]=aa[j],aa[j]=t,++i,++j;break;case 1:t=aa[--k],aa[k]=aa[j],aa[j]=t;break;}sort(aa,l,i);l=k; }}
#define N 300005
int ttt[N],n,m,h[N],e[N<<1][2],ne=1,y[N],id,pp[N],jj[N],ee[N],dd[N],w[N],tin[N],tout[N],timer=1;
void _l(int u,int v){e[++ne][0]=v,e[ne][1]=h[u],h[u]=ne;}
void __u(int*t,int p,int k){if(p<1)p=1; for(;p<N;p+=p&-p)t[p]+=k; }
int __q(int*t,int p){if(p<1)return 0;int z=0;for(;p;p-=p&-p)z+=t[p];return z;}
int __s(int*t,int k){int p=0,v=0,j=1<<20;for(;j>>=1;)if(p+j<N&&v+t[p+j]<k)v+=t[p+=j];return p+1;}
void doedge(int v,int k){
__u(ttt,tin[v],k);
__u(ttt,tout[v]+1,-k);
}
void dfs(int u,int p){
tin[u]=timer++;
for(int v,j=h[u];j;j=e[j][1])if((v=e[j][0])!=p&&y[j>>1]){
dd[v]=dd[pp[v]=u]+1;
ee[v]=j>>1;
pp[v]=u;
jj[v]=(dd[p]-dd[jj[u]]==dd[jj[u]]-dd[jj[jj[u]]])?jj[jj[u]]:u;
dfs(v,u);
doedge(v,1);
}
tout[u]=timer-1;
}
int qq(int u,int v){
if(dd[u]>dd[v])return qq(v,u);
while(dd[v]>dd[u])
if(dd[jj[v]]>=dd[u]) v=jj[v];
else v=pp[v];
while(u-v)
if(jj[v]-jj[u])u=jj[u],v=jj[v];
else u=pp[u],v=pp[v];
return u;
}
int nx(int u,int aa){
int base=__q(ttt,tin[u]);
while(dd[u]>dd[aa]&&__q(ttt,tin[pp[u]])==base){
u=(dd[jj[u]]>dd[aa]&&__q(ttt,tin[jj[u]])==base)?jj[u]:pp[u];
}
return u;
}
int need[N],np,ord=1;
int c1(int i,int j){return i<j?-1:1;}
int main(){
scanf("%d%d",&n,&m);
for(int u,v,i=1;i<=m;++i)scanf("%d%d",&u,&v),_l(u,v),_l(v,u);
for(int j,i=1;i<n;++i)scanf("%d",&j),y[j]=1;
pp[1]=jj[1]=1;dfs(1,1);
for(int j=1;j<=m;++j)if(w[j]){
int u=e[j*2][0],v=e[j*2+1][0];
if(dd[v]+1==dd[u]){int t=u;u=v;v=t;}
if(!y[j]){
int lca=qq(u,v),aa[]={u,v};
for(int kk=0;kk<2;++kk){
int ii=nx(aa[kk],lca);
while(dd[ii]>dd[lca])
{
doedge(ii,-1),need[np++]=ee[ii];
ii=nx(ii,lca);
}
}
compar=c1;sort(need,0,np);
for(int i=0;i<np;++i) w[need[i]]=ord++;
np=0;
w[j]=ord++;
}else{
w[j]=ord++;
doedge(v,-1);
}
}
for(int j=1;j<=m;++j)printf("%d ",w[j]);
}
Compilation message
riggedroads.cpp: In function 'int main()':
riggedroads.cpp:58:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
58 | scanf("%d%d",&n,&m);
| ~~~~~^~~~~~~~~~~~~~
riggedroads.cpp:59:35: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
59 | for(int u,v,i=1;i<=m;++i)scanf("%d%d",&u,&v),_l(u,v),_l(v,u);
| ~~~~~^~~~~~~~~~~~~~
riggedroads.cpp:60:32: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
60 | for(int j,i=1;i<n;++i)scanf("%d",&j),y[j]=1;
| ~~~~~^~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
10584 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
10584 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
33 ms |
13404 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
51 ms |
20052 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
80 ms |
23728 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
69 ms |
21748 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
10584 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
