#include<stdio.h>
#include<assert.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][2],ne,y[N],id,pp[N],jj[N],ee[N],dd[N],w[N],tin[N],tout[N],timer;
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){ for(;p<N;p+=p&-p)t[p]+=k; }
int __q(int*t,int p){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][1])-p&&y[(j+1)/2]){
dd[v]=dd[pp[v]=u]+1;
ee[v]=(j+1)/2;
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;
int c1(int i,int j){return ee[i]<ee[j]?-1:ee[i]>ee[j]?1:0;}
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);
int ord = 1;
for(int j=1;j<=m;++j){
int u=e[j*2-1][0],v=e[j*2][0],lca;
if(dd[v]+1==dd[u]){int t=u;u=v;v=t;}
if(w[j])continue;
if(!y[j]){
int lca=qq(u,v);
int left=__q(ttt,tin[u])+__q(ttt,tin[v])-__q(ttt,tin[lca])*2;
for(int ii=nx(u,lca);dd[ii]>dd[lca];ii=nx(ii,lca)) doedge(ii,-1),need[np++]=ii;
for(int ii=nx(v,lca);dd[ii]>dd[lca];ii=nx(ii,lca)) doedge(ii,-1),need[np++]=ii;
compar=c1;sort(need,0,np);
for(int i=0;i<np;++i) w[ee[need[i]]]=ord++;
np=0;
w[j]=ord++;
}else{
assert(dd[u]+1==dd[v]);
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:71:17: warning: unused variable 'left' [-Wunused-variable]
71 | int left=__q(ttt,tin[u])+__q(ttt,tin[v])-__q(ttt,tin[lca])*2;
| ^~~~
riggedroads.cpp:66:39: warning: unused variable 'lca' [-Wunused-variable]
66 | int u=e[j*2-1][0],v=e[j*2][0],lca;
| ^~~
riggedroads.cpp:59:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
59 | scanf("%d%d",&n,&m);
| ~~~~~^~~~~~~~~~~~~~
riggedroads.cpp:60:35: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
60 | for(int u,v,i=1;i<=m;++i)scanf("%d%d",&u,&v),_l(u,v),_l(v,u);
| ~~~~~^~~~~~~~~~~~~~
riggedroads.cpp:61:32: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
61 | for(int j,i=1;i<n;++i)scanf("%d",&j),y[j]=1;
| ~~~~~^~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
5 ms |
8796 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
5 ms |
8796 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
35 ms |
19448 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
47 ms |
15700 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
55 ms |
17744 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
207 ms |
262144 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
5 ms |
8796 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
